[gpfsug-discuss] mmbackup with own policy

[Ulrich Sibiller]

On 6/23/21 1:31 PM, Frederick Stock wrote:
> The only requirement for your own backup policy is that it finds the files you want to back up and 
> skips those that you do not want to back up.  It is no different than any policy that you would use 
> with the GPFS policy engine.

Have you ever sucessfully done this?

Let me explain again:
With an own policy I know what I want to see in the output and for an arbitrary external rule I know 
where the called script resides and what parameters it expects.

mmbackup however creates a helper script (BAexecScript.<filesys>) on the fly and calls that from its 
autogenerated policy via the external rule line. I assume I need the BAexecScript to make mmbackup 
behave like it should. Is this wrong?

Update: after playing around for quite some time it looks the rule must have a special format, as 
shown below. Replace the placeholders like this:
<backupserver>   the name of the Backupserver as defined in dsm.sys and on the mmbackup command line 
via --tsm-servers
<fsname>         as shown in mmlsfs all_local (without /dev/)
<mountpoint>     as shown in mmlsfs -T

--------------------------------------------------------------------------------------------
RULE EXTERNAL LIST 'mmbackup.1.<backupserver>' EXEC 
'<mountpoint>/.mmbackupCfg/BAexecScript.<fsname>' OPTS 
'"<mountpoint>/.mmbackupShadow.1.<backupserver>.filesys.update" "-servername=<backupserver>" 
"-auditlogname=<mountpoint>/mmbackup.audit.<fsname>.<backupserver>" "NONE"'

RULE 'BackupRule' LIST 'mmbackup.1.<backupserver>' DIRECTORIES_PLUS
      SHOW(VARCHAR(MODIFICATION_TIME) || ' ' || VARCHAR(CHANGE_TIME) || ' ' ||
           VARCHAR(FILE_SIZE)         || ' ' || VARCHAR(FILESET_NAME) ||
           ' ' || 'resdnt' )
   WHERE ( KB_ALLOCATED > 1024 )
--------------------------------------------------------------------------------------------

Call it like this:

/usr/lpp/mmfs/bin/mmbackup  <mountpoint> --tsm-servers <backupserver> -P <policyfile>


As this non-trivial it should be mentioned in the documentation!

Uli

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