Commands for managing SSI options
These commands include:
SSI commands syntax
The basic syntax for these options is as follows.
ssid optionName keyword
The following figure displays the syntax for the commands.
Syntax for SSI override options
SSI commands descriptions
The following table describes the commands in more detail.
Commands for setting SSI override settings
Displays the SSI override settings that are enabled for the specified XBM subsystem identifier (SSID)
The following example illustrates how this information is displayed:
Sets the DATAMOVER option for hardware devices
Sets the ENQWAIT option for hardware devices
Sets the EXTALLOC option for hardware devices
For EMC devices, the AUTO value specifies to try the snapshot with the OFF value first. If the snapshot fails, it falls back to using the ON mode.
Specifies whether to generate the FCTOPPRCPRIMARY DFDSS keyword
The command keyword differs based on the vendor of the storage device to which XBM is issuing the command:
Before using this command, review the vendor documentation to determine which settings your hardware supports.
To use these commands, you must have the appropriate support in the DASD controller.
Enable vendorFCTOPPRCPRIMARY only if your controller and storage device software support this feature. Otherwise, Instant Snapshot requests might fail.
If you specify the PMN, PMP, or PMR keyword for this command, all storage devices for the specified vendor in your environment must support that feature or jobs will fail. These commands set the option globally for all devices in your environment.
Sets the number of tasks to use for hardware devices during Instant Snapshot processing
Increase this value only in small increments while carefully assessing performance. Setting this value too high for your environment can cause abends or other problems due to insufficient storage in the XBM subsystem.
Any integer from 1 through 9
This value specifies the number of tasks to use during Instant Snapshot processing. Increasing the value might improve performance for Instant Snapshot processing.
Specifies the number of volumes that are available for snapshot processing
The command SET MAXVOLS 32 results in 32 volumes being made available to snapshot jobs that use XBMX subsystem ID.
Any integer from 4 to 56
The default value is 16. If you specify a value of 3 or less, XBM sets the value to 4. If you specify a value of 57 or higher, XBM sets the value to 56.
Sets the NOTIFYWHENCOMPLETE option for EMC hardware devices
This option specifies that EMC devices issue a message when the copy completes.
Specifies whether to generate volume lists during hardware snapshots that use FlashCopy
Specifies whether to generate volume lists during hardware snapshots
For more information about the hardware settings or option keywords, see your hardware vendor’s documentation.