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https://issues.apache.org/jira/browse/CLOUDSTACK-4489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
edison su resolved CLOUDSTACK-4489.
-----------------------------------
Resolution: Fixed
> [object_store_refactor] First snapshot on disk after upgrade is not
> incremental if there was a snapshot taken before upgrade for the disk
> -----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-4489
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-4489
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Snapshot, Storage Controller, XenServer
> Affects Versions: 4.2.1
> Environment: Build is from commit
> :a6bf80216466ada185de7e04d3e64be4e25c11a7
> Upgrade from 3.0.6 to 4.2
> Cluster: Xen
> Reporter: Sanjeev N
> Assignee: edison su
> Priority: Critical
> Fix For: 4.2.1
>
> Attachments: cloud.dmp, management-server.log,
> management-server.log.2013-08-23.gz
>
>
> First snapshot on disk after upgrade is not incremental if there was a
> snapshot taken before upgrade for the disk
> Steps to reproduce:
> ===============
> 1.Install 3.0.6 and bring up CS with xen cluster
> 2.Deploy guest vm with both root and data disk
> 3.Create a snapshot on data disk
> 4.Upgrade to 4.2
> 5.After upgrade again take snapshot on the same data disk
> Result:
> ======
> Snapshot created was full snapshot.
> Observations:
> ===========
> In snapshot_store_ref table parent_snapshot_id was set to 0. Created another
> snapshot on the same data disk for which parent_snapshot_id was set to the
> snapshot_id taken after the upgrade.
> mysql> select id,snapshot_id,volume_id,parent_snapshot_id,install_path from
> snapshot_store_ref where volume_id=11 and store_role='Image';
> +-----+-------------+-----------+--------------------+-----------------------------------------------------+
> | id | snapshot_id | volume_id | parent_snapshot_id | install_path
> |
> +-----+-------------+-----------+--------------------+-----------------------------------------------------+
> | 1 | 1 | 11 | 0 |
> snapshots/2/11/eb957385-d67e-4338-8f24-831a392dba0e |
> | 227 | 115 | 11 | 0 |
> snapshots/2/11/2900f706-c6b8-4ab0-ab5a-a3a4b40d709b |
> | 229 | 116 | 11 | 115 |
> snapshots/2/11/2900f706-c6b8-4ab0-ab5a-a3a4b40d709b |
> +-----+-------------+-----------+--------------------+-----------------------------------------------------+
> snapshot_id 1 was taken before upgrade, 115 and 116 were taken after upgrade.
> For snapshot 115 parent_snapshot_id is 0 and snapshot size is same as
> snapshot 1 i.e. it's a full snapshot.
> Attaching management server log file and cloud db.
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