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Veritas NetBackup™ Troubleshooting Guide

Last Published: 2019-07-01

Product(s): NetBackup (8.2)

Troubleshooting Auto Image Replication

Auto Image Replication replicates the backups that are generated in one NetBackup domain to another media server in one or more NetBackup domains.

Note:

Although Auto Image Replication supports replication across different master server domains, the Replication Director does not.

Auto Image Replication operates like any duplication job except that its job contains no write side. The job must consume a read resource from the disk volume on which the source images reside. If no media server is available, the job fails with status 800.

The Auto Image Replication job operates at a disk volume level. Within the storage unit that is specified in the storage lifecycle policy for the source copy, some disk volumes may not support replication. Use the Disk Pools interface of the NetBackup Administration Console to verify that the image is on a disk volume that supports replication. If the interface shows that the disk volume is not a replication source, click Update Disk Volume or Refresh to update the disk volume(s) in the disk pool. If the problem persists, check your disk device configuration.

The action to take on the automatic replication job depends on several conditions as shown in the following table.

Action	Condition
AIR replication jobs have not started	Verify the following: The SLP is active. The nbstserv daemon is running. The image has not exceeded the extended retry count.
AIR replication jobs are queued but have not started	No media server or I/O stream is available.
AIR replication jobs fail, for example with status 191	Check the job details for more information about the failure. For more details, review the `bpdm` log on the media server that processed the replication job.

Action

Condition

AIR replication jobs have not started

Verify the following:

The SLP is active.
The nbstserv daemon is running.
The image has not exceeded the extended retry count.

AIR replication jobs are queued but have not started

No media server or I/O stream is available.

AIR replication jobs fail, for example with status 191

Check the job details for more information about the failure.

For more details, review the bpdm log on the media server that processed the replication job.

The following procedure is based on NetBackup that operates in an OpenStorage configuration. This configuration communicates with a Media Server Deduplication Pool (MSDP) that uses Auto Image Replication.

To troubleshoot Auto Image Replication jobs

Display the storage server information by using the following command:

# bpstsinfo -lsuinfo -stype PureDisk -storage_server 
storage_server_name

Example output:

LSU Info:
Server Name: PureDisk:ss1.acme.com
LSU Name: PureDiskVolume
Allocation : STS_LSU_AT_STATIC
Storage: STS_LSU_ST_NONE
Description: PureDisk storage unit (/ss1.acme.com#1/2)
Configuration: 
Media: (STS_LSUF_DISK | STS_LSUF_ACTIVE | STS_LSUF_STORAGE_NOT_FREED 
   | STS_LSUF_REP_ENABLED | STS_LSUF_REP_SOURCE)
Save As : (STS_SA_CLEARF | STS_SA_OPAQUEF | STS_SA_IMAGE)
Replication Sources: 0 ( )
Replication Targets: 1 ( PureDisk:bayside:PureDiskVolume )
...

This output shows the logical storage unit (LSU) flags STS_LSUF_REP_ENABLED and STS_LSUF_REP_SOURCE for PureDiskVolume. PureDiskVolume is enabled for Auto Image Replication and is a replication source.

To verify that NetBackup recognizes these two flags, run the following command:

# nbdevconfig -previewdv -stype PureDisk -storage_server 
storage_server_name -media_server media_server_name -U
Disk Pool Name      : 
Disk Type           : PureDisk
Disk Volume Name    : PureDiskVolume
...
Flag                : ReplicationSource
...

The ReplicationSource flag confirms that NetBackup recognizes the LSU flags.

To display the replication targets by using the raw output, run the following command:

# nbdevconfig -previewdv -stype PureDisk -storage_server 
storage_server_name -media_server media_server_name

V_5_ DiskVolume < "PureDiskVolume" "PureDiskVolume" 46068048064 
   46058373120 0 0 0 16 1 >
V_5_ ReplicationTarget < "bayside:PureDiskVolume" >

The display shows that the replication target is a storage server called bayside and the LSU (volume) name is PureDiskVolume.

To ensure that NetBackup captured this configuration correctly, run the following command:
```
# nbdevquery -listdv -stype PureDisk -U
Disk Pool Name      : PDpool
Disk Type           : PureDisk
Disk Volume Name    : PureDiskVolume
...
Flag                : AdminUp
Flag                : InternalUp
Flag                : ReplicationSource
Num Read Mounts     : 0
...
```
This listing shows that disk volume PureDiskVolume is configured in disk pool PDPool, and that NetBackup recognizes the replication capability on the source side. A similar nbdevquery command on the target side should display ReplicationTarget for its disk volume.
If NetBackup does not recognize the replication capability, run the following command:
```
# nbdevconfig -updatedv -stype PureDisk -dp PDpool
```
To ensure that you have a storage unit that uses this disk pool, run the following command:
```
# bpstulist 
PDstu 0 _STU_NO_DEV_HOST_ 0 -1 -1 1 0 "*NULL*" 
   1 1 51200 *NULL* 2 6 0 0 0 0 PDpool *NULL*
```
The output shows that storage unit PDstu uses disk pool PDpool.

Check the settings on the disk pool by running the following command:

nbdevquery -listdp -stype PureDisk -dp PDpool -U
Disk Pool Name   : PDpool
Disk Pool Id     : PDpool
Disk Type        : PureDisk
Status           : UP
Flag             : Patchwork
...
Flag             : OptimizedImage
Flag             : ReplicationTarget
Raw Size (GB)    : 42.88
Usable Size (GB) : 42.88
Num Volumes      : 1
High Watermark   : 98
Low Watermark    : 80
Max IO Streams   : -1
Comment          : 
Storage Server   : ss1.acme.com (UP)

Max IO Streams is set to -1, which means the disk pool has unlimited input-output streams.

To check the list of media servers that are credentialed to access the storage servers and their disk pools, run the following command:

# tpconfig -dsh -all_hosts
==============================================================
Media Server:                   ss1.acme.com
Storage Server:                 ss1.acme.com
User Id:                        root
    Storage Server Type:        BasicDisk
    Storage Server Type:        SnapVault
    Storage Server Type:        PureDisk
==============================================================

This disk pool only has one media server, ss1.acme.com. You have completed the storage configuration validation.

The last phase of validation is the storage lifecycle policy configuration. To run Auto Image Replication, the source copy must be on storage unit PDstu. Run the following command (for example):

nbstl woodridge2bayside -L
                                Name: woodridge2bayside
                 Data Classification: (none specified)
            Duplication job priority: 0
                               State: active
                             Version: 0
 Destination  1              Use for: backup
                             Storage: PDstu
                         Volume Pool: (none specified)
                        Server Group: (none specified)
                      Retention Type: Fixed
                     Retention Level: 1 (2 weeks)
               Alternate Read Server: (none specified)
               Preserve Multiplexing: false
      Enable Automatic Remote Import: true
                               State: active
                              Source: (client)
                      Destination ID: 0
 Destination  2              Use for: 3 (replication to remote master)
                             Storage: Remote Master
                         Volume Pool: (none specified)
                        Server Group: (none specified)
                                 ...
               Preserve Multiplexing: false
      Enable Automatic Remote Import: false
                               State: active
                              Source: Destination 1 (backup:PDstu)
                      Destination ID: 0

To troubleshoot the Auto Image Replication job flow, use the same command lines as you use for other storage lifecycle policy managed jobs. For example, to list the images that have been duplicated to remote master, run the following:

nbstlutil list -copy_type replica -U -copy_state 3

To list the images that have not been duplicated to remote master (either pending or failed), run the following:

nbstlutil list -copy_type replica -U -copy_incomplete

To show the status for completed replication copies, run the following command:

nbstlutil repllist -U
Image:
 Master Server            : ss1.acme.com
 Backup ID                : woodridge_1287610477
 Client                   : woodridge
 Backup Time              : 1287610477 (Wed Oct 20 16:34:37 2010)
 Policy                   : two-hop-with-dup
 Client Type              : 0
 Schedule Type            : 0
 Storage Lifecycle Policy : woodridge2bayside2pearl_withdup
 Storage Lifecycle State  : 3 (COMPLETE) 
 Time In Process          : 1287610545 (Wed Oct 20 16:35:45 2010)
 Data Classification ID   : (none specified)
 Version Number           : 0
 OriginMasterServer       : (none specified)
 OriginMasterServerID     : 00000000-0000-0000-0000-000000000000
 Import From Replica Time : 0 (Wed Dec 31 18:00:00 1969)
 Required Expiration Date : 0 (Wed Dec 31 18:00:00 1969)
 Created Date Time        : 1287610496 (Wed Oct 20 16:34:56 2010)

 Copy:
   Master Server       : ss1.acme.com
   Backup ID           : woodridge_1287610477
   Copy Number         : 102
   Copy Type           : 3
   Expire Time         : 1290288877 (Sat Nov 20 15:34:37 2010)
   Expire LC Time      : 1290288877 (Sat Nov 20 15:34:37 2010)
   Try To Keep Time    : 1290288877 (Sat Nov 20 15:34:37 2010)
   Residence           : Remote Master
   Copy State          : 3 (COMPLETE) 
   Job ID              : 25
   Retention Type      : 0 (FIXED) 
   MPX State           : 0 (FALSE)
   Source              : 1
   Destination ID      : 
   Last Retry Time     : 1287610614

 Replication Destination:
   Source Master Server: ss1.acme.com
   Backup ID           : woodridge_1287610477
   Copy Number         : 102
   Target Machine      : bayside
   Target Info         : PureDiskVolume
   Remote Master       : (none specified)