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Question about cleanup/deletion of snapshots when using SPS/FCM on a SVC

  • 1.  Question about cleanup/deletion of snapshots when using SPS/FCM on a SVC

    Posted 10 days ago
    Hi guys

    We are using SPS/FCM 8.1.9 (Spectrum Protect Snapshot/Flashcopy Manager) to snapshot a couple of quite large filesystems on a SVC. The snapshot is done on a set of 6 LUNs each 32TiB in size. This creates a CG (consistency group) containing 6 FC maps (using NOCOPY parameter). Then the FC volumes start to fill up and sometimes reach a change percentage of up to 10% before being deleted/cleaned up.
    When it's time to delete such a big snaphot (either being deleted by reaching MAX_VERSIONS oder by hand with 'fcmcli -f delete -B <BackupID>') the first thing that happens is the CG needs to be stopped. Now the "delete job" itself returns successfully after a couple of seconds but if the stopping of the CG takes too long (sometimes up to 2 hours depending on the load of the SVC) the CG just gets left behind in a stopped state including the FC volumes going offline. This stays for days without being cleaned up by SPS/FCM - we usually have to do this manually on the SVC.

    My questions now are:
    - how can we convince SPS/FCM to clean up "it's mess"?
    - is there a way to have SPS/FCM look a the storage system and delete any old volumes/CGs/FC maps that it cannot find in the repository anymore


    Thanks and Cheers
    Peter

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    Peter Wyder
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  • 2.  RE: Question about cleanup/deletion of snapshots when using SPS/FCM on a SVC

    Posted 7 days ago
    It is correct that the delete command just marks the objects for deletion. The real delete happens asynchronously by the background monitor. Because this can take quite long as you have observed. Would recommend to open a ticket with support to get this analyzed further.

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    Thomas Prause
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