[jira] [Resolved] (CLOUDSTACK-5370) Xenserver - Snapshots - vhd entries get accumulated on the primary store when snapshot creation fails becasue of not being able to reach the secondary store.

["edison su (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CLOUDSTACK-5370?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

edison su resolved CLOUDSTACK-5370.
-----------------------------------

    Resolution: Fixed

when error happened during snapshot, we need to delete the snapshot on primary storage and also in db.

> Xenserver - Snapshots - vhd entries get accumulated on the primary store when snapshot creation fails becasue of not being able to reach the secondary store.
> -------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-5370
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-5370
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Management Server
>    Affects Versions: 4.3.0
>         Environment: Build from 4.3
>            Reporter: Sangeetha Hariharan
>            Assignee: edison su
>            Priority: Critical
>             Fix For: 4.3.0
>
>
> Set up:
> Advanced Zone with 2 Xenserver 6.2 hosts:
> 1. Deploy 5 Vms in each of the hosts with 10 GB ROOT volume size , so we start with 10 Vms.
> 2. Start concurrent snapshots for ROOT volumes of all the Vms.
> 3. Shutdown the Secondary storage server when the snapshots are in the progress. ( In my case i stopped the nfs server)
> 4. Bring the Secondary storage server up after 12 hours. ( In my case started the nfs server).
> When secondary server was down (NFS server down) for about 12 hours , I see that hourly snapshots get attempted every hour and fail with “CreatedOnPrimary" state . I see many entries being created on the primary store ( I see 120 entries , but I have only 14 vms).
> We accumulate  2 vhd files on the primary store for  every  snapshot that is attempted.
> When secondary store is brought up , and when  another snapshot is attempted and it succeeds, we see the vhd files are all being cleared out.
> This is a problem that we accumulate so many vhd files ( In case of vmware and kvm where there are no delta snapshots this size would be significantly higher) on primary store. 



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