Storage Foundation 7.3 Administrator's Guide - AIX

Last Published:
Product(s): InfoScale & Storage Foundation (7.3)
  1. Section I. Introducing Storage Foundation
    1. Overview of Storage Foundation
      1.  
        About Storage Foundation
      2.  
        About Dynamic Multi-Pathing (DMP)
      3.  
        About Veritas Volume Manager
      4. About Veritas File System
        1.  
          About the Veritas File System intent log
        2.  
          About extents
        3.  
          About file system disk layouts
      5. About Storage Foundation Cluster File System (SFCFS)
        1. About Veritas File System features supported in cluster file systems
          1.  
            Veritas File System features not in cluster file systems
      6.  
        About Veritas InfoScale Operations Manager
      7.  
        Use cases for Storage Foundation
    2. How Dynamic Multi-Pathing works
      1. How DMP works
        1. Device discovery
          1.  
            About enclosure-based naming
        2. How DMP monitors I/O on paths
          1. Path failover mechanism
            1.  
              Subpaths Failover Group (SFG)
            2.  
              Low Impact Path Probing (LIPP)
          2.  
            I/O throttling
        3.  
          Load balancing
        4.  
          Using DMP with LVM boot disks
        5.  
          Disabling MPIO
        6. DMP in a clustered environment
          1.  
            About enabling or disabling controllers with shared disk groups
      2.  
        Veritas Volume Manager co-existence with Oracle Automatic Storage Management disks
    3. How Veritas Volume Manager works
      1. How Veritas Volume Manager works with the operating system
        1.  
          How data is stored
      2. How Veritas Volume Manager handles storage management
        1. Physical objects
          1.  
            Disk arrays
        2. Virtual objects
          1.  
            Combining virtual objects in Veritas Volume Manager
        3.  
          About the configuration daemon in Veritas Volume Manager
        4.  
          Multiple paths to disk arrays
      3. Volume layouts in Veritas Volume Manager
        1.  
          Non-layered volumes
        2.  
          Layered volumes
        3.  
          Layout methods
        4.  
          Concatenation, spanning, and carving
        5.  
          Striping (RAID-0)
        6.  
          Mirroring (RAID-1)
        7.  
          Striping plus mirroring (mirrored-stripe or RAID-0+1)
        8.  
          Mirroring plus striping (striped-mirror, RAID-1+0, or RAID-10)
        9. RAID-5 (striping with parity)
          1.  
            Traditional RAID-5 arrays
          2.  
            Veritas Volume Manager RAID-5 arrays
          3.  
            Left-symmetric layout
          4.  
            RAID-5 logging
          5.  
            About layered volumes
      4. Online relayout
        1.  
          How online relayout works
        2.  
          Limitations of online relayout
        3.  
          Transformation characteristics
        4.  
          Transformations and volume length
      5. Volume resynchronization
        1.  
          Dirty flags
        2.  
          Resynchronization process
      6.  
        Hot-relocation
      7. Dirty region logging
        1.  
          Log subdisks and plexes
        2.  
          Sequential DRL
      8. Volume snapshots
        1.  
          Comparison of snapshot features
      9. FastResync
        1.  
          How FastResync works
        2.  
          How non-persistent FastResync works with snapshots
        3.  
          How persistent FastResync works with snapshots
        4. DCO volume versioning
          1.  
            Instant snap (version 20) DCO volume layout
          2.  
            Version 0 DCO volume layout
        5.  
          Effect of growing a volume on the FastResync map
        6.  
          FastResync limitations
      10.  
        Volume sets
      11. How VxVM handles hardware clones or snapshots
        1.  
          How VxVM uses the unique disk identifier (UDID)
    4. How Veritas File System works
      1.  
        Veritas File System features
      2. Veritas File System performance enhancements
        1. Enhanced I/O performance
          1.  
            Enhanced I/O clustering
          2.  
            Veritas Volume Manager integration with Veritas File System for enhanced I/O performance
          3.  
            Application-specific parameters for enhanced I/O performance
        2.  
          Delayed allocation for extending writes
      3. Using Veritas File System
        1.  
          VxFS Administration using SMIT
        2. Online system administration
          1.  
            About defragmentation
          2.  
            About file system resizing
        3. Application program interface
          1.  
            Expanded application facilities
  2. Section II. Provisioning storage
    1. Provisioning new storage
      1.  
        Provisioning new storage
      2.  
        Growing the existing storage by adding a new LUN
      3.  
        Growing the existing storage by growing the LUN
      4.  
        Displaying SF information with vxlist
    2. Advanced allocation methods for configuring storage
      1. Customizing allocation behavior
        1.  
          Setting default values for vxassist
        2. Using rules to make volume allocation more efficient
          1.  
            Rule file format
          2.  
            Using rules to create a volume
        3. Understanding persistent attributes
          1.  
            Using persistent attributes
        4. Customizing disk classes for allocation
          1.  
            User-defined alias names for disk classes
          2.  
            User-defined precedence order for disk classes
          3.  
            User-defined disk classes
        5. Specifying allocation constraints for vxassist operations with the use clause and the require clause
          1.  
            About require constraints
          2.  
            About use constraints
          3.  
            Interaction of multiple require and use constraints
          4.  
            Examples of use and require constraints
        6.  
          Management of the use and require type of persistent attributes
      2. Creating volumes of a specific layout
        1.  
          Types of volume layouts
        2. Creating a mirrored volume
          1.  
            Creating a mirrored-concatenated volume
          2.  
            Creating a concatenated-mirror volume
        3. Creating a striped volume
          1.  
            Creating a mirrored-stripe volume
          2.  
            Creating a striped-mirror volume
        4.  
          Creating a RAID-5 volume
      3.  
        Creating a volume on specific disks
      4.  
        Creating volumes on specific media types
      5.  
        Specifying ordered allocation of storage to volumes
      6.  
        Site-based allocation
      7.  
        Changing the read policy for mirrored volumes
    3. Creating and mounting VxFS file systems
      1. Creating a VxFS file system
        1.  
          File system block size
        2.  
          Intent log size
      2.  
        Converting a file system to VxFS
      3. Mounting a VxFS file system
        1.  
          log mount option
        2.  
          delaylog mount option
        3. tmplog mount option
          1.  
            Logging mode persistence guarantees
        4.  
          logiosize mount option
        5.  
          nodatainlog mount option
        6.  
          blkclear mount option
        7.  
          mincache mount option
        8.  
          convosync mount option
        9. ioerror mount option
          1.  
            disable policy
          2.  
            wdisable policy and mwdisable policy
          3.  
            mdisable policy
        10. largefiles and nolargefiles mount options
          1.  
            Creating a file system with large files
          2.  
            Mounting a file system with large files
          3.  
            Managing a file system with large files
        11.  
          cio mount option
        12.  
          mntlock mount option
        13.  
          ckptautomnt mount option
        14.  
          Combining mount command options
      4.  
        Unmounting a file system
      5. Resizing a file system
        1.  
          Extending a file system using fsadm
        2.  
          Shrinking a file system
        3.  
          Reorganizing a file system
      6.  
        Displaying information on mounted file systems
      7. Monitoring free space
        1.  
          Monitoring fragmentation
    4. Extent attributes
      1. About extent attributes
        1.  
          Reservation: preallocating space to a file
        2.  
          Fixed extent size
        3.  
          How the fixed extent size works with the shared extents
        4. Other extent attribute controls
          1.  
            Extent attribute alignment
          2.  
            Extent attribute contiguity
          3.  
            Write operations beyond extent attribute reservation
          4.  
            Extent attribute reservation trimming
          5.  
            Extent attribute reservation persistence
          6.  
            Including an extent attribute reservation in the file
      2. Commands related to extent attributes
        1.  
          About failing to preserve extent attributes
  3. Section III. Administering multi-pathing with DMP
    1. Administering Dynamic Multi-Pathing
      1. Discovering and configuring newly added disk devices
        1.  
          Partial device discovery
        2. About discovering disks and dynamically adding disk arrays
          1.  
            How DMP claims devices
          2.  
            Disk categories
          3.  
            Adding DMP support for a new disk array
          4.  
            Enabling discovery of new disk arrays
          5.  
            Discovering renamed devices on AIX
        3.  
          About third-party driver coexistence
        4. How to administer the Device Discovery Layer
          1.  
            Listing all the devices including iSCSI
          2.  
            Listing all the Host Bus Adapters including iSCSI
          3.  
            Listing the ports configured on a Host Bus Adapter
          4.  
            Listing the targets configured from a Host Bus Adapter or a port
          5.  
            Listing the devices configured from a Host Bus Adapter and target
          6.  
            Getting or setting the iSCSI operational parameters
          7.  
            Listing all supported disk arrays
          8.  
            Displaying details about an Array Support Library
          9.  
            Excluding support for a disk array library
          10.  
            Re-including support for an excluded disk array library
          11.  
            Listing excluded disk arrays
          12.  
            Listing disks claimed in the DISKS category
          13.  
            Adding unsupported disk arrays to the DISKS category
          14.  
            Removing disks from the DISKS category
          15.  
            Foreign devices
      2.  
        Making devices invisible to VxVM
      3.  
        Making devices visible to VxVM
      4.  
        About enabling and disabling I/O for controllers and storage processors
      5.  
        About displaying DMP database information
      6.  
        Displaying the paths to a disk
      7. Administering DMP using the vxdmpadm utility
        1.  
          Retrieving information about a DMP node
        2.  
          Displaying consolidated information about the DMP nodes
        3.  
          Displaying the members of a LUN group
        4.  
          Displaying paths controlled by a DMP node, controller, enclosure, or array port
        5.  
          Displaying information about controllers
        6.  
          Displaying information about enclosures
        7.  
          Displaying information about array ports
        8.  
          Displaying information about devices controlled by third-party drivers
        9.  
          Displaying extended device attributes
        10.  
          Suppressing or including devices from VxVM control
        11. Gathering and displaying I/O statistics
          1.  
            Displaying cumulative I/O statistics
          2.  
            Displaying statistics for queued or erroneous I/Os
          3.  
            Examples of using the vxdmpadm iostat command
        12.  
          Setting the attributes of the paths to an enclosure
        13.  
          Displaying the redundancy level of a device or enclosure
        14.  
          Specifying the minimum number of active paths
        15.  
          Displaying the I/O policy
        16. Specifying the I/O policy
          1.  
            Scheduling I/O on the paths of an Asymmetric Active/Active or an ALUA array
          2.  
            Example of applying load balancing in a SAN
        17.  
          Disabling I/O for paths, controllers, array ports, or DMP nodes
        18.  
          Enabling I/O for paths, controllers, array ports, or DMP nodes
        19.  
          Renaming an enclosure
        20.  
          Configuring the response to I/O failures
        21.  
          Configuring the I/O throttling mechanism
        22.  
          Configuring Low Impact Path Probing (LIPP)
        23.  
          Configuring Subpaths Failover Groups (SFG)
        24.  
          Displaying recovery option values
        25.  
          Configuring DMP path restoration policies
        26.  
          Stopping the DMP path restoration thread
        27.  
          Displaying the status of the DMP path restoration thread
        28.  
          Configuring Array Policy Modules
    2. Dynamic Reconfiguration of devices
      1.  
        About online dynamic reconfiguration
      2. Reconfiguring a LUN online that is under DMP control using the Dynamic Reconfiguration tool
        1.  
          Removing LUNs dynamically from an existing target ID
        2.  
          Adding new LUNs dynamically to a target ID
        3.  
          Replacing LUNs dynamically from an existing target ID
        4.  
          Replacing a host bus adapter online
      3. Manually reconfiguring a LUN online that is under DMP control
        1.  
          Overview of manually reconfiguring a LUN
        2.  
          Manually removing LUNs dynamically from an existing target ID
        3.  
          Manually adding new LUNs dynamically to a new target ID
        4.  
          About detecting target ID reuse if the operating system device tree is not cleaned up
        5.  
          Scanning an operating system device tree after adding or removing LUNs
        6.  
          Manually cleaning up the operating system device tree after removing LUNs
        7.  
          Manually replacing a host bus adapter online
      4.  
        Changing the characteristics of a LUN from the array side
      5.  
        Upgrading the array controller firmware online
    3. Managing devices
      1. Displaying disk information
        1.  
          About Media Format Discovery
        2.  
          Viewing information about the native layouts of operating system
        3. Viewing information about the disk sector size
          1.  
            Supported operating systems
        4.  
          Displaying disk information with vxdiskadm
      2. Changing the disk device naming scheme
        1.  
          Displaying the disk-naming scheme
        2.  
          Setting customized names for DMP nodes
        3.  
          Regenerating persistent device names
        4.  
          Changing device naming for enclosures controlled by third-party drivers
        5. About the Array Volume Identifier (AVID) attribute
          1.  
            Enclosure based naming with the Array Volume Identifier (AVID) attribute
      3.  
        About disk installation and formatting
      4. Adding and removing disks
        1. Adding a disk to VxVM
          1.  
            Disk reinitialization
          2.  
            Using vxdiskadd to put a disk under VxVM control
        2. Removing disks
          1.  
            Removing a disk with subdisks
          2.  
            Removing a disk with no subdisks
      5.  
        Renaming a disk
    4. Event monitoring
      1.  
        About the Dynamic Multi-Pathing (DMP) event source daemon (vxesd)
      2.  
        Fabric Monitoring and proactive error detection
      3.  
        Dynamic Multi-Pathing (DMP) discovery of iSCSI and SAN Fibre Channel topology
      4.  
        DMP event logging
      5.  
        Starting and stopping the Dynamic Multi-Pathing (DMP) event source daemon
  4. Section IV. Administering Storage Foundation
    1. Administering sites and remote mirrors
      1. About sites and remote mirrors
        1.  
          About site-based allocation
        2.  
          About site consistency
        3.  
          About site tags
        4.  
          About the site read policy
      2.  
        Making an existing disk group site consistent
      3.  
        Configuring a new disk group as a Remote Mirror configuration
      4. Fire drill - testing the configuration
        1.  
          Simulating site failure
        2.  
          Verifying the secondary site
        3.  
          Recovery from simulated site failure
      5. Changing the site name
        1.  
          Resetting the site name for a host
      6. Administering the Remote Mirror configuration
        1.  
          Configuring site tagging for disks or enclosures
        2.  
          Configuring automatic site tagging for a disk group
        3.  
          Configuring site consistency on a volume
      7.  
        Examples of storage allocation by specifying sites
      8.  
        Displaying site information
      9. Failure and recovery scenarios
        1.  
          Recovering from a loss of site connectivity
        2.  
          Recovering from storage failure
        3.  
          Recovering from site failure
        4.  
          Recovering from disruption to connectivity to storage at all sites from the hosts at a site
        5.  
          Automatic site reattachment
  5. Section V. Optimizing I/O performance
    1. Veritas File System I/O
      1.  
        About Veritas File System I/O
      2. Buffered and Direct I/O
        1. Direct I/O
          1.  
            Direct I/O requirements
          2.  
            Direct I/O versus synchronous I/O
          3.  
            Direct I/O CPU overhead
          4.  
            Discovered Direct I/O
        2.  
          Unbuffered I/O
        3. Data synchronous I/O
          1.  
            Data synchronous I/O vs. synchronous I/O
      3.  
        Concurrent I/O
      4.  
        Cache advisories
      5.  
        Freezing and thawing a file system
      6.  
        Getting the I/O size
      7.  
        About Veritas InfoScale product components database accelerators
    2. Veritas Volume Manager I/O
      1.  
        Veritas Volume Manager throttling of administrative I/O
  6. Section VI. Using Point-in-time copies
    1. Understanding point-in-time copy methods
      1.  
        About point-in-time copies
      2. When to use point-in-time copies
        1.  
          Implementing point-in time copy solutions on a primary host
        2.  
          Implementing off-host point-in-time copy solutions
      3. About Storage Foundation point-in-time copy technologies
        1.  
          Comparison of Point-in-time copy solutions
      4. Volume-level snapshots
        1.  
          Persistent FastResync of volume snapshots
        2.  
          Data integrity in volume snapshots
        3.  
          Third-mirror break-off snapshots
        4. Space-optimized instant volume snapshots
          1.  
            How space-optimized instant snapshots work
        5.  
          Choices for snapshot resynchronization
        6.  
          Disk group split/join
      5. Storage Checkpoints
        1.  
          How Storage Checkpoints differ from snapshots
        2. How a Storage Checkpoint works
          1.  
            Copy-on-write
          2. Storage Checkpoint visibility
            1.  
              Storage Checkpoints and 64-bit inode numbers
        3. Types of Storage Checkpoints
          1.  
            Data Storage Checkpoints
          2.  
            Nodata Storage Checkpoints
          3.  
            Removable Storage Checkpoints
          4.  
            Non-mountable Storage Checkpoints
      6. About FileSnaps
        1.  
          Properties of FileSnaps
        2.  
          Concurrent I/O to FileSnaps
        3.  
          Copy-on-write and FileSnaps
        4.  
          Reading from FileSnaps
        5.  
          Block map fragmentation and FileSnaps
        6.  
          Backup and FileSnaps
      7. About snapshot file systems
        1.  
          How a snapshot file system works
    2. Administering volume snapshots
      1.  
        About volume snapshots
      2. Traditional third-mirror break-off snapshots
        1. Creating traditional third-mirror break-off snapshots
          1.  
            Converting a plex into a snapshot plex
          2.  
            Creating multiple snapshots with the vxassist command
          3.  
            Reattaching a snapshot volume
          4.  
            Adding plexes to a snapshot volume
          5.  
            Dissociating a snapshot volume
          6.  
            Displaying snapshot information
      3. Full-sized instant snapshots
        1. Creating instant snapshots
          1. Adding an instant snap DCO and DCO volume
            1.  
              Creating a shared cache object
            2.  
              Creating a volume for use as a full-sized instant or linked break-off snapshot
            3.  
              Upgrading the instant snap Data Change Objects (DCOs) and DCO volumes for a VxVM volume
          2.  
            Creating and managing space-optimized instant snapshots
          3.  
            Creating and managing full-sized instant snapshots
          4.  
            Creating and managing third-mirror break-off snapshots
          5.  
            Creating and managing linked break-off snapshot volumes
          6.  
            Creating multiple instant snapshots
          7.  
            Creating instant snapshots of volume sets
          8.  
            Adding snapshot mirrors to a volume
          9.  
            Removing a snapshot mirror
          10.  
            Removing a linked break-off snapshot volume
          11.  
            Adding a snapshot to a cascaded snapshot hierarchy
          12.  
            Refreshing an instant space-optimized snapshot
          13.  
            Reattaching an instant full-sized or plex break-off snapshot
          14.  
            Reattaching a linked break-off snapshot volume
          15.  
            Restoring a volume from an instant space-optimized snapshot
          16.  
            Dissociating an instant snapshot
          17.  
            Removing an instant snapshot
          18.  
            Splitting an instant snapshot hierarchy
          19.  
            Displaying instant snapshot information
          20. Controlling instant snapshot synchronization
            1.  
              Improving the performance of snapshot synchronization
          21.  
            Listing the snapshots created on a cache
          22.  
            Tuning the autogrow attributes of a cache
          23.  
            Monitoring and displaying cache usage
          24.  
            Growing and shrinking a cache
          25.  
            Removing a cache
      4.  
        Linked break-off snapshots
      5. Cascaded snapshots
        1.  
          Creating a snapshot of a snapshot
      6.  
        Creating multiple snapshots
      7.  
        Restoring the original volume from a snapshot
      8. Adding a version 0 DCO and DCO volume
        1.  
          Specifying storage for version 0 DCO plexes
        2.  
          Removing a version 0 DCO and DCO volume
        3.  
          Reattaching a version 0 DCO and DCO volume
    3. Administering Storage Checkpoints
      1.  
        About Storage Checkpoints
      2. Storage Checkpoint administration
        1.  
          Creating a Storage Checkpoint
        2.  
          Removing a Storage Checkpoint
        3.  
          Accessing a Storage Checkpoint
        4. Converting a data Storage Checkpoint to a nodata Storage Checkpoint
          1.  
            Showing the difference between a data and a nodata Storage Checkpoint
          2.  
            Converting multiple Storage Checkpoints
          3.  
            Creating a delayed nodata Storage Checkpoint
        5.  
          Enabling and disabling Storage Checkpoint visibility
      3.  
        Storage Checkpoint space management considerations
      4.  
        Restoring from a Storage Checkpoint
      5.  
        Storage Checkpoint quotas
    4. Administering FileSnaps
      1.  
        FileSnap creation
      2.  
        Using FileSnaps
      3. Using FileSnaps to create point-in-time copies of files
        1.  
          Using FileSnaps to provision virtual desktops
        2.  
          Using FileSnaps to optimize write intensive applications for virtual machines
        3.  
          Using FileSnaps to create multiple copies of data instantly
        4.  
          An example to perform FileSnap
      4.  
        Comparison of the logical size output of the fsadm -S shared, du, and df commands
    5. Administering snapshot file systems
      1.  
        Snapshot file system backups
      2.  
        Snapshot file system performance
      3.  
        About snapshot file system disk structure
      4.  
        Differences between snapshots and Storage Checkpoints
      5.  
        Creating a snapshot file system
  7. Section VII. Optimizing storage with Storage Foundation
    1. Understanding storage optimization solutions in Storage Foundation
      1.  
        About thin provisioning
      2.  
        About thin optimization solutions in Storage Foundation
      3. About SmartMove
        1.  
          SmartMove for thin provisioning
      4.  
        About the Thin Reclamation feature
      5.  
        Determining when to reclaim space on a thin reclamation LUN
      6.  
        How automatic reclamation works
    2. Migrating data from thick storage to thin storage
      1.  
        About using SmartMove to migrate to Thin Storage
      2.  
        Migrating to thin provisioning
    3. Maintaining Thin Storage with Thin Reclamation
      1. Reclamation of storage on thin reclamation arrays
        1.  
          About Thin Reclamation of a disk, a disk group, or an enclosure
        2.  
          About Thin Reclamation of a file system
      2. Identifying thin and thin reclamation LUNs
        1.  
          Displaying detailed information about reclamation commands
      3.  
        Displaying VxFS file system usage on thin reclamation LUNs
      4.  
        Reclaiming space on a file system
      5.  
        Reclaiming space on a disk, disk group, or enclosure
      6.  
        About the reclamation log file
      7.  
        Monitoring Thin Reclamation using the vxtask command
      8.  
        Configuring automatic reclamation
    4. Veritas InfoScale 4k sector device support solution
      1.  
        About 4K sector size technology
      2.  
        Veritas InfoScale unsupported configurations
      3.  
        Migrating VxFS file system from 512-bytes sector size devices to 4K sector size devices
  8. Section VIII. Maximizing storage utilization
    1. Understanding storage tiering with SmartTier
      1. About SmartTier
        1.  
          About VxFS multi-volume file systems
        2.  
          About VxVM volume sets
        3.  
          About volume tags
        4.  
          SmartTier file management
        5.  
          SmartTier sub-file object management
      2.  
        How the SmartTier policy works with the shared extents
      3.  
        SmartTier in a High Availability (HA) environment
    2. Creating and administering volume sets
      1.  
        About volume sets
      2.  
        Creating a volume set
      3.  
        Adding a volume to a volume set
      4.  
        Removing a volume from a volume set
      5.  
        Listing details of volume sets
      6.  
        Stopping and starting volume sets
      7. Managing raw device nodes of component volumes
        1.  
          Enabling raw device access when creating a volume set
        2.  
          Displaying the raw device access settings for a volume set
        3.  
          Controlling raw device access for an existing volume set
    3. Multi-volume file systems
      1.  
        About multi-volume file systems
      2.  
        About volume types
      3. Features implemented using multi-volume file system (MVFS) support
        1.  
          Volume availability
      4.  
        Creating multi-volume file systems
      5.  
        Converting a single volume file system to a multi-volume file system
      6. Adding a volume to and removing a volume from a multi-volume file system
        1.  
          Adding a volume to a multi-volume file system
        2.  
          Removing a volume from a multi-volume file system
        3.  
          Forcibly removing a volume in a multi-volume file system
        4.  
          Moving volume 0 in a multi-volume file system
      7. Volume encapsulation
        1.  
          Encapsulating a volume
        2.  
          Deencapsulating a volume
      8.  
        Reporting file extents
      9. Load balancing
        1.  
          Defining and assigning a load balancing allocation policy
        2.  
          Rebalancing extents
      10.  
        Converting a multi-volume file system to a single volume file system
    4. Administering SmartTier
      1. About SmartTier
        1.  
          About compressing files with SmartTier
      2.  
        Supported SmartTier document type definitions
      3. Placement classes
        1.  
          Tagging volumes as placement classes
        2.  
          Listing placement classes
      4. Administering placement policies
        1.  
          Assigning a placement policy
        2.  
          Unassigning a placement policy
        3.  
          Analyzing the space impact of enforcing a placement policy
        4.  
          Querying which files will be affected by enforcing a placement policy
        5.  
          Enforcing a placement policy
        6.  
          Validating a placement policy
      5.  
        File placement policy grammar
      6. File placement policy rules
        1.  
          SELECT statement
        2.  
          CREATE statement
        3. RELOCATE statement
          1.  
            Specifying the I/O temperature relocation criterion
          2.  
            Prefer attribute
          3.  
            Average I/O activity criteria
          4.  
            RELOCATE statement examples
        4. DELETE statement
          1.  
            DELETE statement examples
        5. COMPRESS statement
          1.  
            Specifying the I/O temperature compression criterion
          2.  
            Prefer attribute
          3.  
            Average I/O activity criteria
          4.  
            COMPRESS statement examples
        6. UNCOMPRESS statement
          1.  
            Specifying the I/O temperature uncompression criterion
          2.  
            Prefer attribute
          3.  
            Average I/O activity criteria
          4.  
            UNCOMPRESS statement examples
      7.  
        Calculating I/O temperature and access temperature
      8. Multiple criteria in file placement policy rule statements
        1.  
          Multiple file selection criteria in SELECT statement clauses
        2.  
          Multiple placement classes in <ON> clauses of CREATE statements and in <TO> clauses of RELOCATE statements
        3.  
          Multiple placement classes in <FROM> clauses of RELOCATE and DELETE statements
        4.  
          Multiple conditions in <WHEN> clauses of RELOCATE and DELETE statements
      9.  
        File placement policy rule and statement ordering
      10.  
        File placement policies and extending files
      11. Using SmartTier with solid state disks
        1.  
          Fine grain temperatures with solid state disks
        2.  
          Prefer mechanism with solid state disks
        3.  
          Average I/O activity with solid state disks
        4.  
          Frequent SmartTier scans with solid state disks
        5.  
          Quick identification of cold files with solid state disks
        6.  
          Example placement policy when using solid state disks
      12. Sub-file relocation
        1.  
          Moving sub-file data of files to specific target tiers
    5. Administering hot-relocation
      1.  
        About hot-relocation
      2. How hot-relocation works
        1.  
          Partial disk failure mail messages
        2.  
          Complete disk failure mail messages
        3.  
          How space is chosen for relocation
      3.  
        Configuring a system for hot-relocation
      4.  
        Displaying spare disk information
      5.  
        Marking a disk as a hot-relocation spare
      6.  
        Removing a disk from use as a hot-relocation spare
      7.  
        Excluding a disk from hot-relocation use
      8.  
        Making a disk available for hot-relocation use
      9.  
        Configuring hot-relocation to use only spare disks
      10. Moving relocated subdisks
        1. Moving relocated subdisks using vxunreloc
          1.  
            Moving hot-relocated subdisks back to their original disk
          2.  
            Moving hot-relocated subdisks back to a different disk
          3.  
            Forcing hot-relocated subdisks to accept different offsets
          4.  
            Examining which subdisks were hot-relocated from a disk
        2.  
          Restarting vxunreloc after errors
      11.  
        Modifying the behavior of hot-relocation
    6. Deduplicating data
      1. About deduplicating data
        1.  
          About deduplication chunk size
        2.  
          Deduplication and file system performance
        3.  
          About the deduplication scheduler
      2. Deduplicating data
        1.  
          Enabling and disabling deduplication on a file system
        2.  
          Scheduling deduplication of a file system
        3.  
          Performing a deduplication dry run
        4.  
          Querying the deduplication status of a file system
        5.  
          Starting and stopping the deduplication scheduler daemon
      3.  
        Deduplication results
      4.  
        Deduplication supportability
      5.  
        Deduplication use cases
      6.  
        Deduplication limitations
    7. Compressing files
      1. About compressing files
        1.  
          About the compressed file format
        2.  
          About the file compression attributes
        3.  
          About the file compression block size
      2.  
        Compressing files with the vxcompress command
      3.  
        Interaction of compressed files and other commands
      4.  
        Interaction of compressed files and other features
      5.  
        Interaction of compressed files and applications
      6. Use cases for compressing files
        1. Compressed files and databases
          1.  
            Supported database versions and environment
          2.  
            Compressing archive logs
          3.  
            Compressing read-only tablespaces
          4.  
            Compressing infrequently accessed table partitions
          5.  
            Compressing infrequently accessed datafiles
          6.  
            Best practices for compressing files in an Oracle database
        2.  
          Compressing all files that meet the specified criteria
  9. Section IX. Administering storage
    1. Administering VxVM volumes as paging devices
      1.  
        About VxVM volumes as paging devices
      2.  
        Configuring VxVM volumes as secondary paging devices
      3.  
        Listing the VxVM paging volumes
      4. Changing the characteristics of VxVM paging volumes
        1.  
          Resizing the VxVM paging volume
        2.  
          Activating or deactivating the paging volume
      5.  
        Removing VxVM paging volumes
      6.  
        Administering VxVM pagespace through System Management Interface Tool (SMIT)
    2. Managing volumes and disk groups
      1. Rules for determining the default disk group
        1.  
          Displaying the system-wide boot disk group
        2.  
          Displaying and specifying the system-wide default disk group
      2. Moving volumes or disks
        1.  
          Moving volumes from a VxVM disk
        2.  
          Moving disks between disk groups
        3. Reorganizing the contents of disk groups
          1.  
            Limitations of disk group split and join
          2. Listing objects potentially affected by a move
            1.  
              Moving DCO volumes between disk groups
          3.  
            Moving objects between disk groups
          4.  
            Splitting disk groups
          5.  
            Joining disk groups
      3. Monitoring and controlling tasks
        1.  
          Specifying task tags
        2. Managing tasks with vxtask
          1.  
            vxtask operations
          2.  
            Using the vxtask command
      4.  
        Using vxnotify to monitor configuration changes
      5. Performing online relayout
        1.  
          Permitted relayout transformations
        2.  
          Specifying a non-default layout
        3.  
          Specifying a plex for relayout
        4.  
          Tagging a relayout operation
        5.  
          Viewing the status of a relayout
        6.  
          Controlling the progress of a relayout
      6. Adding a mirror to a volume
        1.  
          Mirroring all volumes
        2.  
          Mirroring volumes on a VxVM disk
      7.  
        Configuring SmartMove
      8.  
        Removing a mirror
      9.  
        Setting tags on volumes
      10. Managing disk groups
        1. Disk group versions
          1.  
            Upgrading the disk group version
          2.  
            Creating a disk group with an earlier disk group version
        2. Displaying disk group information
          1.  
            Displaying free space in a disk group
        3.  
          Creating a disk group
        4.  
          Removing a disk from a disk group
        5.  
          Deporting a disk group
        6. Importing a disk group
          1.  
            Setting the automatic recovery of volumes
        7.  
          Handling of minor number conflicts
        8. Moving disk groups between systems
          1.  
            Handling errors when importing disks
          2.  
            Reserving minor numbers for disk groups
          3.  
            Compatibility of disk groups between platforms
        9. Importing a disk group containing hardware cloned disks
          1.  
            Considerations when using EMC CLARiiON SNAPSHOT LUNs
          2.  
            Writing a new UDID to a disk
          3.  
            Importing the existing disk group with only the cloned disks
          4.  
            Importing the cloned disks as a new standard disk group
          5.  
            Importing a set of cloned disks with tags
        10.  
          Setting up configuration database copies (metadata) for a disk group
        11.  
          Renaming a disk group
        12. Handling conflicting configuration copies
          1.  
            Example of a serial split brain condition in a cluster
          2.  
            Correcting conflicting configuration information
        13.  
          Disabling a disk group
        14. Destroying a disk group
          1.  
            Recovering a destroyed disk group
        15. Backing up and restoring disk group configuration data
          1.  
            Backing up and restoring Flexible Storage Sharing disk group configuration data
        16.  
          Working with existing ISP disk groups
      11. Managing plexes and subdisks
        1. Reattaching plexes
          1.  
            Automatic plex reattachment
          2.  
            Reattaching a plex manually
        2.  
          Plex synchronization
      12. Decommissioning storage
        1.  
          Removing a volume
        2.  
          Removing a disk from VxVM control
        3.  
          About shredding data
        4.  
          Shredding a VxVM disk
        5. Removing and replacing disks
          1.  
            Replacing a failed or removed disk
    3. Using DMP with a SAN boot disk
      1. Configuring DMP for SAN booting
        1.  
          Configuring DMP support for booting over a SAN
        2.  
          Migrating an internal root disk to a SAN root disk under DMP control
        3.  
          Migrating a SAN root disk from MPIO to DMP control
        4.  
          Migrating a SAN root disk from EMC PowerPath to DMP control
      2. Administering the root volume group (rootvg) under DMP control
        1.  
          Running the bosboot command when LVM rootvg is enabled for DMP
        2. Extending an LVM rootvg that is enabled for DMP
          1.  
            Extending an LVM rootvg when dmp_native_support is on
          2.  
            Extending an LVM rootvg when dmp_native_support is off
        3.  
          Reducing the native rootvg that is enabled for DMP
        4.  
          Mirroring the root volume group
        5.  
          Removing the mirror for the root volume group (rootvg)
        6.  
          Cloning a LVM rootvg that is enabled for DMP
        7.  
          Cleaning up the alternate disk volume group when LVM rootvg is enabled for DMP
        8.  
          Using mksysb when the root volume group is under DMP control
        9.  
          Upgrading Storage Foundation and AIX on a DMP-enabled rootvg
    4. Quotas
      1.  
        About Veritas File System quota limits
      2.  
        About quota files on Veritas File System
      3.  
        About Veritas File System quota commands
      4.  
        About quota checking with Veritas File System
      5. Using Veritas File System quotas
        1.  
          Turning on Veritas File System quotas
        2.  
          Turning on Veritas File System quotas at mount time
        3.  
          Editing Veritas File System quotas
        4.  
          Modifying Veritas File System quota time limits
        5.  
          Viewing Veritas File System disk quotas and usage
        6.  
          Displaying blocks owned by users or groups
        7.  
          Turning off Veritas File System quotas
        8.  
          Support for 64-bit Quotas
    5. File Change Log
      1.  
        About Veritas File System File Change Log
      2.  
        About the Veritas File System File Change Log file
      3.  
        Veritas File System File Change Log administrative interface
      4.  
        Veritas File System File Change Log programmatic interface
      5.  
        Summary of Veritas File System File Change Log API functions
  10. Section X. Reference
    1. Appendix A. Reverse path name lookup
      1.  
        About reverse path name lookup
    2. Appendix B. Tunable parameters
      1.  
        About tuning Storage Foundation
      2. Tuning the VxFS file system
        1.  
          Tuning performance optimization of inode allocation
        2.  
          Partitioned directories
        3.  
          Global tunable parameters
        4.  
          Global tunable parameter table
        5. Veritas Volume Manager maximum I/O size
          1.  
            vol_maxio
      3.  
        DMP tunable parameters
      4. Methods to change Dynamic Multi-Pathing tunable parameters
        1.  
          Changing the values of DMP parameters with the vxdmpadm settune command line
        2. About tuning Dynamic Multi-Pathing (DMP) with templates
          1.  
            DMP tuning templates
          2.  
            Example DMP tuning template
          3.  
            Tuning a DMP host with a configuration attribute template
          4.  
            Managing the DMP configuration files
          5.  
            Resetting the DMP tunable parameters and attributes to the default values
          6.  
            DMP tunable parameters and attributes that are supported for templates
      5.  
        DMP driver tunables
      6. Tunable parameters for VxVM
        1.  
          Tunable parameters for core VxVM
        2.  
          Tunable parameters for FlashSnap (FMR)
        3.  
          Tunable parameters for CVM
        4.  
          Tunable parameters for VVR
        5.  
          Points to note when changing the values of the VVR tunables
      7. Methods to change Veritas Volume Manager tunable parameters
        1.  
          Changing the values of the Veritas Volume Manager tunable parameters using the vxtune command line
        2.  
          Changing the value of the Veritas Volume Manager tunable parameters using templates
        3.  
          Changing the tunable values using SMIT
    3. Appendix C. Command reference
      1.  
        Command completion for Veritas commands
      2.  
        Veritas Volume Manager command reference
      3. Veritas Volume Manager manual pages
        1.  
          Section 1M - administrative commands
        2.  
          Section 4 - file formats
        3.  
          Section 7 - device driver interfaces
      4.  
        Veritas File System command summary
      5.  
        Veritas File System manual pages
      6.  
        SmartIO command reference

Importing the existing disk group with only the cloned disks

If the standard (non-clone) disks in a disk group are not imported, you can import the existing disk group with only the cloned disks. By default, the clone_disk flag is set on the disks so that you can continue to distinguish between the original disks and the cloned disks.

This procedure is useful for temporary scenarios. For example, if you want to import only the clone disks to verify the point-in-time copy. After you have verified the clone disks, you can deport the clone disks and import the standard disks again.

Be sure to import a consistent set of cloned disks, which represent a single point of time copy of the original disks. Each of the disks must have either the udid_mismatch flag or the clone_disk flag or both. No two of the disks should have the same UDID. That is, there must not be two copies of the same original disk.

You must use disk tags if multiple copies of disks in a disk group are present on the system.

VxVM does not support a disk group with both clone and non-clone disks. If you want to import both clone disks and standard disks simultaneously, you must specify a new disk group name for the clone disk group.

To import the disk group with only the cloned disks

  1. Make sure that at least one of the cloned disks has a copy of the current configuration database in its private region.

  2. Import only the cloned disks by specifying the -o useclonedev=on option to the vxdg import command, as shown in this example:
    # vxdg -o useclonedev=on [-o updateid] import mydg

    This form of the command allows only cloned disks to be imported. All non-cloned disks remain unimported.

    Specify the -o updateid option to write new identification attributes to the disks, and to set the clone_disk flag on the disks. (The vxdisk set clone=on command can also be used to set the flag.)

More Information

Importing a set of cloned disks with tags

Importing the cloned disks as a new standard disk group

Setting up configuration database copies (metadata) for a disk group