[
https://issues.apache.org/jira/browse/CLOUDSTACK-9733?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rajani Karuturi updated CLOUDSTACK-9733:
----------------------------------------
Fix Version/s: (was: 4.10.0.0)
4.10.1.0
> Concurrent volume snapshots of a VM are not allowed and are not limited per
> host as per the global configuration parameter
> "concurrent.snapshots.threshold.perhost".
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-9733
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9733
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Snapshot, Volumes
> Reporter: Suresh Kumar Anaparti
> Assignee: Suresh Kumar Anaparti
> Fix For: 4.10.1.0
>
>
> Pre-CloudStack 4.4.0, before the VM job framework changes (CLOUDSTACK-669),
> Concurrent volume (both root and data) snapshots were allowed per host based
> on the value of global config "concurrent.snapshots.threshold.perhost". The
> volumes could belong to the same VM or spread across multiple VMs on a given
> host. The synchronisation was done based on the host (Id).
> As part of the VM job framework changes (CLOUDSTACK-669) in CloudStack 4.4.0,
> a separate job queue was introduced for individual VMs with a concurrency
> level of 1 (i.e. all operations to a given VM are serialized). Volume
> snapshot was also considered as a VM operation as part of these changes and
> goes through the VM job queue. These changes made the config
> "concurrent.snapshots.threshold.perhost" obsolete (it was also no longer
> getting honoured, since there is no single point of enforcement).
> Only one volume snapshot of a VM is allowed at any given point of time as the
> sync object is the VM (id). So concurrent volume snapshots of a VM are not
> allowed and are not limited per host as per the global configuration
> parameter "concurrent.snapshots.threshold.perhost".
> This functionality needs to be re-introduced to execute more than 1 snapshot
> of a VM at a time (when the underlying hypervisor supports) and snapshots
> should be limited per host based on the value of
> "concurrent.snapshots.threshold.perhost" at the cluster level (for more
> flexibility).
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
