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From "Sanjay Tripathi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-5406) Not able to take snapshot becasue of secondary_storage limit of 400 gb exceeded even though we have not really consumed this limit in secondary store.
Date Wed, 01 Jan 2014 05:13:51 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-5406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13859832#comment-13859832
] 

Sanjay Tripathi commented on CLOUDSTACK-5406:
---------------------------------------------

Hi Edison,

The fix for this issue is to calculate the physical size of snapshot; but the physical size
for snapshots in snapshot_store_ref table is zero and not getting updated. So, i'll file a
separate ticket to track the physical size issue in snapshot_store_ref table. 

> Not able to take snapshot becasue of secondary_storage limit of 400 gb exceeded even
though we have not really consumed this limit in secondary store.
> ------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-5406
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-5406
>             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: Sanjay Tripathi
>            Priority: Critical
>             Fix For: 4.3.0
>
>         Attachments: storage.rar
>
>
> Set up: 
> Xenserver setup with 2 NFS secondary stores.
> 1 account having 21 Vms.
> I am using the the default "secondary_storage" limit which is 400 gb.
>  
> Started hourly snapshot policy for all the ROOT volumes of the Vms which was created
from a template of size 20 gb. The actual used up size is 12 GB. 
> When  snapshot gets created , the full snapshot size is ~6.7 GB. 
>  After only  2  snapshots of ROOT volume , I hit the following excepton:
>  
> “2013-12-06 00:00:48,298 WARN  [c.c.s.s.SnapshotSchedulerImpl] (SnapshotPollTask:ctx-a7ccb50a)
Scheduling snapshot failed due to com.cloud.exception.ResourceAllocationException: Maximum
number of resources of type 'secondary_storage' for account name=test-TestParallelVolumeSnasohots-273V8U
in domain id=1 has been exceeded.”
>  
> How are we calculating this limit ? Do we query the actual secondary store / do we calculate
based on the ROOT volume size and # of Snapshots.
>  
> In case of Xenserve , we have Delta snapshots.We should not be 
>  
> mysql> select count(*) from snapshots where account_id=8 group by volume_id;
> +----------+
> | count(*) |
> +----------+
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        2 |
> |        3 |
> |        3 |
> +----------+
> 21 rows in set (0.00 sec)
>  
>  
> [root@Rack3Host5 secondary]# du -h --max-depth=1
> 28G     ./snapshots
> 13G     ./template
> 4.0K    ./volumes
> 41G     .
>  
>  
> [root@Rack3Host8 secondary]# du -h --max-depth=1
> 12G     ./template
> 29G     ./snapshots
> 4.0K    ./volumes
> 41G     .
> [root@Rack3Host8 secondary]#
> mysql> select * from resource_limit;
> +----+-----------+------------+-------------------+---------------+
> | id | domain_id | account_id | type              | max           |
> +----+-----------+------------+-------------------+---------------+
> | 31 |      NULL |          8 | user_vm           |           200 |
> | 32 |      NULL |          8 | public_ip         |           200 |
> | 33 |      NULL |          8 | volume            |           200 |
> | 34 |      NULL |          8 | snapshot          |           200 |
> | 35 |      NULL |          8 | template          |           200 |
> | 36 |      NULL |          8 | vpc               |           200 |
> | 37 |      NULL |          8 | cpu               |            40 |
> | 38 |      NULL |          8 | memory            |         40960 |
> | 39 |      NULL |          8 | network           |            20 |
> | 40 |      NULL |          8 | primary_storage   |  214748364800 |
> | 41 |      NULL |          8 | secondary_storage | 4294967296000 |
> +----+-----------+------------+-------------------+---------------+
> 11 rows in set (0.00 sec)



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