Sanjeev N created CLOUDSTACK-4489:
-------------------------------------
Summary: [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
Priority: Critical
Fix For: 4.2.1
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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