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Mainframe Enablers TimeFinder SnapVX and zDP 8.5 Product Guide

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Summary of operations

Managing VDGs

Table 1. Managing VDGsThe following table lists operations for managing VDGs.
Operation Control
Define VDG DEFINE VDG command
Add or remove devices in VDG. MODIFY VDG ADD|REMOVE command
Bypass sort of VDG devices by PowerMax or VMAX device number.
Enable or disable dynamic VDG updates
Delete VDG DELETE VDG command

Managing target sets

Table 2. Managing target setsThe following table lists operations for managing target sets.
Operation Control
Define a target set. DEFINE TGT command
Add or remove devices in target set. MODIFY TGT ADD|REMOVE command
Bypass sort of target devices by PowerMax or VMAX device number during linking. DEFINE TGT command, NOSORT parameter
Unlink a target set. UNLINK TGT command
Free a target device tracks from SRP. UNLINK TGT command, FREE parameter
Stop freeing a target device tracks from SRP.
Wait for a target track definition before unlinking. UNLINK TGT command, WAIT_FOR_Definition parameter
Determine whether to make target set devices Ready to the host.
Delete a target set. DELETE TGT command

Managing snapsets

Table 3. Managing snapsetsThe following table lists operations for managing snapsets.
Operation Control
Link snapset volumes to a target set. LINK VDG command
Set the background copy mode. LINK VDG command, MODE parameter
Set or reset apersistent attribute for snapset. PERSISTENT command, SET or RESET parameter
Create asecure snapsets.
Restore all source volumes in snapset. RESTORE VDG command
Unlink a restored snapset from VDG. UNLINK VDG command
Wait for a target track definition before unlinking. UNLINK VDG command, WAIT_FOR_Definition parameter
Terminate snapsets. TERMINATE VDG command
Simulate a snapset termination by date and time. GLOBAL command, SIMulate_TERMinate parameter

Setting VDG snapset-related options

Table 4. Setting VDG snapset-related optionsThe following table lists operations for setting VDG snapset-related settings.
Operation Control
Determine whether consistency for all snapshots in a snapset is required.
Set a timeout interval and action for consistency operations.
Specify how often and for how many cycles to create snapsets.
Determine when to create the next snapset if the cycle time is exceeded.

Set the snapset limit.

Determine the action if the snapset limit is reached.
Set the maximum number of persistent snapsets to be created.
Create saved snapsets
Create secure saved snapsets

Setting space utilization parameters

Table 5. Setting SRP usage and RDP cache utilization parametersThe following table lists operations for setting space utilization parameters.
Operation Control
Define the maximum percentage of the SRP that can be allocated for SnapVX.
Define the threshold of SRP usage to initiate automatic termination of snapsets.
Define the threshold to issue a warning message when the total SRP usage exceeds this value.
Monitor RDP cache utilization.

Managing copy-once devices

Table 6. Managing copy-once devicesThe following table lists operations for managing copy-once devices.
Operation Control
Define copy-once devices MODIFY VDG ADD|REMOVE command, COPY_ONCE parameter
List snapsets with copy-once devices. QUERY VDG command, SNAPSET parameter, COPY_ONCE option
View last snapset with copy-once device. QUERY VDG command, DEVICE parameter, COPY_ONCE option
Include copy-once devices for a LINK of snapset that does not contain the copy-once devices. LINK VDG command, COPY_ONCE(INCLUDE) parameter
Link snapset’s copy-once devices manually. LINK VDG command, COPY_ONCE(ONLY) parameter
Include copy-once devices for a RESTORE of snapset that does not contain the copy-once devices. RESTORE VDG command, COPY_ONCE(INCLUDE) parameter
Restore snapset’s copy-once devices manually. RESTORE VDG command, COPY_ONCE(ONLY) parameter

Exporting and importing zDP definitions

Table 7. Exporting and importing zDP definitionsThe following table lists operations for zDP definition export and import.
Operation Control
Enable or disable zDP definition export and import capabilities. GLOBAL command, EXPortDEF parameter
Export VDG and target set definitions. EXPORT command
Import VDG and target set definitions. IMPORT command
View VDG and target set definitions that are saved to SFS. LISTEXP command
Create or keep exported definitions when deleting VDGs or target sets from running zDP instance.
Delete exported VDG or target set definition from SFS.

Monitoring zDP status

Table 8. Monitoring zDP statusThe following table lists operations for monitoring zDP status.
Operation Control
Display VDG status. QUERY VDG command, STATUS parameter
Display VDG devices. QUERY VDG command, DEVICE parameter
Display VDG snapsets. QUERY VDG command, SNAPSET parameter
Display target set status. QUERY TGT command, STATUS parameter
Display target set devices. QUERY TGT command, DEVICE parameter
Display FREE task status.
Display zDP global options. QUERY GLOBAL command

Controlling zDP messaging and SMF records

Table 9. zDP messaging and SMF recordsThe following table lists operations to control zDP messaging and SMF records.
Operation Control
Set whether to display (extended) status messages.
Set whether to issue WTOR for TERMINATE VDG,Date command.
Where to route zDP messages.
Set the maximum allowable return code.

GLOBAL command, MAX_RC parameter

Enable SMF recording. DEFINE VDG command, SMF parameter

Setting zDP runtime task options

Table 10. Setting zDP runtime task optionsThe following table lists operations for setting zDP runtime task options.
Operation Control
Set the maximum number of allowed VDG definitions. GLOBAL command, MAX_VDG parameter
Set the maximum number of allowed target set definitions. GLOBAL command, MAX_TGT parameter
Run commands in NORUN mode. GLOBAL command, NORUN parameter
Set the maximum allowable return code.

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