Veritas Access Administrator's Guide
- Section I. Introducing Veritas Access
- Section II. Configuring Veritas Access
- Adding users or roles
- Configuring the network
- Configuring authentication services
- Section III. Managing Veritas Access storage
- Configuring storage
- Configuring data integrity with I/O fencing
- Configuring ISCSI
- Veritas Access as an iSCSI target
- Configuring storage
- Section IV. Managing Veritas Access file access services
- Configuring the NFS server
- Setting up Kerberos authentication for NFS clients
- Using Veritas Access as a CIFS server
- About Active Directory (AD)
- About configuring CIFS for Active Directory (AD) domain mode
- About setting trusted domains
- About managing home directories
- About CIFS clustering modes
- About migrating CIFS shares and home directories
- About managing local users and groups
- Configuring an FTP server
- Using Veritas Access as an Object Store server
- Configuring the NFS server
- Section V. Monitoring and troubleshooting
- Section VI. Provisioning and managing Veritas Access file systems
- Creating and maintaining file systems
- Considerations for creating a file system
- Modifying a file system
- Managing a file system
- Creating and maintaining file systems
- Section VII. Configuring cloud storage
- Section VIII. Provisioning and managing Veritas Access shares
- Creating shares for applications
- Creating and maintaining NFS shares
- Creating and maintaining CIFS shares
- Using Veritas Access with OpenStack
- Integrating Veritas Access with Data Insight
- Section IX. Managing Veritas Access storage services
- Compressing files
- About compressing files
- Compression tasks
- Configuring SmartTier
- Configuring SmartIO
- Configuring episodic replication
- Episodic replication job failover and failback
- Configuring continuous replication
- How Veritas Access continuous replication works
- Continuous replication failover and failback
- Using snapshots
- Using instant rollbacks
- Compressing files
- Section X. Reference
Modifying tunables for iSCSI
You can set the values of the attributes on the targets. You can set or show the default values, the values for all targets, or the values for a specific target.
Table: Attributes for iSCSI targets shows the target attributes that you can modify.
Table: Attributes for iSCSI targets
Attribute | Description |
---|---|
cmds_max | The maximum number of SCSI commands that the session will queue. A session is defined as a connection between the initiator and target portal for accessing a given target. cmds_max defines the commands per target, which could be multiple LUNs. Valid values range from 2 to 2048 and should be a power of 2. |
fast_abort | Defines whether initiator should respond to R2Ts (Request to Transfer) after sending a task management function like an ABORT_TASK or LOGICAL UNIT RESET. A value of Yes causes the initiator to stop responding to R2Ts after an ABORT_TASK request is received. For Equallogic arrays, the recommended value is No. Valid values are Yes or No. |
initial_login_retry_max | The maximum number of times that the iSCSI initiator should try a login to the target during first login. This only affects the initial login. Valid values range from 1 to 16. During each login attempt, wait for login_timeout seconds for the login to succeed. |
login_timeout | The amount of time that the iSCSI initiator service should wait for login to complete. The value of this attribute is in seconds. Valid values range from 10 to 600. |
logout_timeout | The amount of time that the iSCSI initiator service should wait for logout to complete. The value of this attribute is in seconds. Valid values range from 10 to 600. |
noop_interval | The time to wait between subsequent sending of Nop-out requests. The value of this attribute is in seconds. Valid values range from 5 to 600. |
noop_timeout | The amount of time that the iSCSI initiator service should wait for response to a Nop-out request sent to the target, before failing the connection. Failing the connection causes the I/O to be failed and retried on any other available path. The value of this attribute is in seconds. Valid values range from 5 to 600. |
queue_depth | The maximum number of SCSI commands queued per LUN, belonging to a target. The value for queue_depth cannot be greater than cmds_max. Valid values range from 1 to 128. |
replacement_timeout | The amount of time to wait for session re-establishment before failing SCSI commands. The value of this attribute is in seconds. Valid values range from 10 to 86400. |
To display the default value for target attributes
- To display the default value for target attributes, enter the following:
Storage> iscsi target attr showdefault
To display values for target attributes of all known targets
- To display values for target attributes of all known targets, enter the following:
Storage> iscsi target attr showall
To display the attribute values for a specific target
- To display the attribute values for a specific target, enter the following:
Storage> iscsi target attr show target-name
where target-name is the name of the iSCSI target to be displayed.
To set the default value for a target attribute
- To set the default value for a target attribute, enter the following:
Storage> iscsi target attr setdefault attribute value
attribute
The attribute for which to set the value.
value
The default value to be set for the attribute.
The default value is inherited by any new targets that get added.
To set an attribute value for all known targets
- To set an attribute value for all known targets, enter the following:
Storage> iscsi target attr setall attribute value
attribute
The attribute for which to set the value.
value
The value to be set for the attribute.
This command does not change the default value as shown in the Storage> iscsi target attr showdefault command. Changes to values are effective after re-login.
To set the attribute value for a specific target
- To set the attribute value for a specific target, enter the following:
Storage> iscsi target attr set target-name attribute value
target-name
The name of the specific iSCSI target.
attribute
The attribute of the specific target.
value
The value to be set for the target attribute.