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https://issues.apache.org/jira/browse/CLOUDSTACK-9752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15842691#comment-15842691
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rashmidixit commented on CLOUDSTACK-9752:
-----------------------------------------
Github user serg38 commented on the issue:
https://github.com/apache/cloudstack/pull/1913
@rhtyd @karuturi Can we run vmware tests on this PR and merge on success ?
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> [Vmware] Optimization of volume attachness to vm
> ------------------------------------------------
>
> Key: CLOUDSTACK-9752
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9752
> Project: CloudStack
> Issue Type: Improvement
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: VMware
> Affects Versions: 4.10.0.0
> Reporter: Nicolas Vazquez
> Assignee: Nicolas Vazquez
> Fix For: 4.10.0.0
>
>
> This optimization aims to reduce volume attach slowness due to vmdk files
> search on datastore before creating the volume (search for {{.vmdk}},
> {{-flat.vmdk}} and {{-delta.vmdk}} files to delete them if they exist). This
> search is not necessary when attaching a volume in Allocated state, due to
> volume files don't exist on datastore.
> On large datastores, this search can cause volume attachness to be really
> slow, as we can see in this log lines:
> {code}
> 13-mgmt.log:2016-11-02 10:16:33,136 INFO [vmware.mo.DatastoreMO]
> (DirectAgent-931:ctx-5687d68e uscrlpdcsesx240.ads.autodesk.com,
> job-8675314/job-8675315, cmd: CreateObjectCommand) Searching file
> 9ce7731fd38b4045afbb7ce9754abbc1.vmdk in [b5ebda046d613e079b5874b169cd848f]
> 13-mgmt.log:2016-11-02 10:19:42,567 WARN
> [storage.resource.VmwareStorageLayoutHelper] (DirectAgent-931:ctx-5687d68e
> uscrlpdcsesx240.ads.autodesk.com, job-8675314/job-8675315, cmd:
> CreateObjectCommand) Unable to locate VMDK file:
> 9ce7731fd38b4045afbb7ce9754abbc1.vmdk
> 13-mgmt.log:2016-11-02 10:19:42,719 INFO [vmware.mo.DatastoreMO]
> (DirectAgent-931:ctx-5687d68e uscrlpdcsesx240.ads.autodesk.com,
> job-8675314/job-8675315, cmd: CreateObjectCommand) Search file
> 9ce7731fd38b4045afbb7ce9754abbc1-flat.vmdk on
> [b5ebda046d613e079b5874b169cd848f]
> …
> 13-mgmt.log:2016-11-02 10:19:44,399 INFO [vmware.mo.DatastoreMO]
> (DirectAgent-931:ctx-5687d68e uscrlpdcsesx240.ads.autodesk.com,
> job-8675314/job-8675315, cmd: CreateObjectCommand) Searching file
> 9ce7731fd38b4045afbb7ce9754abbc1-flat.vmdk in
> [b5ebda046d613e079b5874b169cd848f]
> 13-mgmt.log:2016-11-02 10:22:07,581 WARN
> [storage.resource.VmwareStorageLayoutHelper] (DirectAgent-931:ctx-5687d68e
> uscrlpdcsesx240.ads.autodesk.com, job-8675314/job-8675315, cmd:
> CreateObjectCommand) Unable to locate VMDK file:
> 9ce7731fd38b4045afbb7ce9754abbc1-flat.vmdk
> 13-mgmt.log:2016-11-02 10:22:07,731 INFO [vmware.mo.DatastoreMO]
> (DirectAgent-931:ctx-5687d68e uscrlpdcsesx240.ads.autodesk.com,
> job-8675314/job-8675315, cmd: CreateObjectCommand) Search file
> 9ce7731fd38b4045afbb7ce9754abbc1-delta.vmdk on
> [b5ebda046d613e079b5874b169cd848f]
> 13-mgmt.log:2016-11-02 10:22:09,745 INFO [vmware.mo.DatastoreMO]
> (DirectAgent-931:ctx-5687d68e uscrlpdcsesx240.ads.autodesk.com,
> job-8675314/job-8675315, cmd: CreateObjectCommand) Searching file
> 9ce7731fd38b4045afbb7ce9754abbc1-delta.vmdk in
> [b5ebda046d613e079b5874b169cd848f]
> 13-mgmt.log:2016-11-02 10:25:06,362 WARN
> [storage.resource.VmwareStorageLayoutHelper] (DirectAgent-931:ctx-5687d68e
> uscrlpdcsesx240.ads.autodesk.com, job-8675314/job-8675315, cmd:
> CreateObjectCommand) Unable to locate VMDK file:
> 9ce7731fd38b4045afbb7ce9754abbc1-delta.vmdk
> {code}
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