Hi Eric,
Once the backups have been deleted in HANA Studio, then HANA will delay
the actual deletion of the objects in Spectrum Protect. It is not known or
documented by SAP how long this delay may be or on what it depends. We
have seen a delay of several minutes. If you delete a large number of
objects, HANA will delete them in chunks of 500 objects.
The actual deletion can be checked in the 'backint.log' file. After some
time there will be entries like this:
BKI2003I: File R26___A0HZTF1HWY_RZ_TSM_SERVER@MC_DISK#160701 00000
/usr/sap/R26/SYS/global/hdb/backint/2016_09_20_databackup_4_1 deleted.
#DELETED "R26___A0HZTF1HWY"
"/usr/sap/R26/SYS/global/hdb/backint/2016_09_20_databackup_4_1"
BKI2003I: File R26___A0HZTF1HWY_RZ_TSM_SERVER@MC_DISK#150700 00000
/usr/sap/R26/SYS/global/hdb/backint/2016_09_20_databackup_2_1 deleted.
#DELETED "R26___A0HZTF1HWY"
"/usr/sap/R26/SYS/global/hdb/backint/2016_09_20_databackup_2_1"
BKI2003I: File R26___A0HZTF1HWY_RZ_TSM_SERVER@MC_DISK#140699 00000
/usr/sap/R26/SYS/global/hdb/backint/2016_09_20_databackup_3_1 deleted.
#DELETED "R26___A0HZTF1HWY"
"/usr/sap/R26/SYS/global/hdb/backint/2016_09_20_databackup_3_1"
BKI2003I: File R26___A0HZTF1HWY_RZ_TSM_SERVER@MC_DISK#130698 00000
/usr/sap/R26/SYS/global/hdb/backint/2016_09_20_databackup_1_1 deleted.
#DELETED "R26___A0HZTF1HWY"
"/usr/sap/R26/SYS/global/hdb/backint/2016_09_20_databackup_1_1"
IBM does plan to add support for expiration based on version limit in a
future delivery.
Del
"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 06/19/2017
05:22:33 AM:
> From: "Loon, Eric van (ITOPT3) - KLM" <Eric-van.Loon AT KLM DOT COM>
> To: ADSM-L AT VM.MARIST DOT EDU
> Date: 06/19/2017 05:23 AM
> Subject: SAP HANA backup expiration
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
> Dear Del,
> About a year ago you explained why TDP for HANA backup versioning is
> no longer working (see your mail down below), do you know if SAP has
> fixed this issue by now?
> I'm still struggling with this in our environment. The only
> documentation I can find on the IBM site about this issue is
> IT11810. It contains two options:
>
> 1) Create a new domain and use the retver option, which could
> cause all you backups to expire when no backup is made during that
> period (so not acceptable for us).
>
> 2) Remove obsolete backup manually through SAP Studio.
> When we use option 2, the backups seem to be removed from SAP, but I
> still see the archive objects in TSM... Is this circumvention maybe
> documented somewhere in more detail?
> Thank you very much for your help in advance!
> Kind regards,
> Eric van Loon
> Air France/KLM Storage Engineering
>
>
> Eric,
> This "design change" is a "change" from the Data Protection for ERP
> perspective, but not from the Data Protection for ERP for SAP HANA
> perspective, which has always worked this way.
> This design "change" is a result of a current limitation in the SAP
> HANA BACKINT API and is expected to be temporary. This backup API
streams the
> backup data to the DP for SAP HANA client via named pipes and today
> it gives no indication whether the data stream was complete or the pipe
was
> closed prematurely due to some error.
> We don't want to expire a prior/older backup version unless we know
> we have a successful new backup version so we do not currently offer
> expiration of backups based on version limit. However, we do plan
> to provide that capability once SAP implements the enhancement to the
backup
> API we have requested (to indicate whether or not all the data was
> streamed successfully). SAP did indicate they plan to provide that
> enhancement but we do not yet have a target date for that.
> Thank you,
> Del
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