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storage: optional 'refresh' elemement on pool

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The new 'refresh' element can override the default refresh operations
for a storage pool. The only currently supported override is to set
the volume allocation size to the volume capacity. This can be specified
by adding the following snippet:

<pool>
...
  <refresh>
    <volume allocation='capacity'/>
  </refresh>
...
</pool>

This is useful for certain backends where computing the actual allocation
of a volume might be an expensive operation.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Jason Dillaman
2019-03-19 09:42:17 -04:00
committed by Michal Privoznik
parent 21deeaf02f
commit 669018bc9c
9 changed files with 172 additions and 0 deletions
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18
tests/storagepoolxml2xmlout/pool-rbd-refresh-volume-allocation.xml Normal file
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<pool type='rbd'>
<name>ceph</name>
<uuid>47c1faee-0207-e741-f5ae-d9b019b98fe2</uuid>
<capacity unit='bytes'>0</capacity>
<allocation unit='bytes'>0</allocation>
<available unit='bytes'>0</available>
<source>
<host name='localhost' port='6789'/>
<host name='localhost' port='6790'/>
<name>rbd</name>
<auth type='ceph' username='admin'>
<secret uuid='2ec115d7-3a88-3ceb-bc12-0ac909a6fd87'/>
</auth>
</source>
<refresh>
<volume allocation='capacity'/>
</refresh>
</pool>