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https://issues.apache.org/jira/browse/CLOUDSTACK-9752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15855359#comment-15855359
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ASF GitHub Bot commented on CLOUDSTACK-9752:
--------------------------------------------
Github user SudharmaJain commented on the issue:
https://github.com/apache/cloudstack/pull/1913
@nvazquez I think in case if connection to vcenter fails there are changes
as the disk may get created on vcenter. In such case we may need to remove the
vmdk. we can improve the logic to search vmdk in specific location of data
store and reduce the delay.
> [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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