|Subject:||xfs_growfs / planned resize / performance impact|
|From:||Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx>|
|Date:||Tue, 31 Jul 2012 15:56:54 +0200|
|User-agent:||Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120714 Thunderbird/14.0|
Hello list,i'm planning to create a couple of VMs with just 30GB of space while using xfs as the main filesystem.
Now i alreay know that some of the VMs will grow up to 250GB while resizing the block device and using xfs_growfs.
Should i take care of that and format these disks with special parameters?I've discovered that a 500GB volume has agcount=4 and 64000 blocks of internal log - while a 300GB volume resized to 500GB has agcount 7 ad only 40960 blocks of internal log.
Is it a problem if this grow will happen in small portions (30GB => 50GB => 75GB => 100GB => ... 300GB)?
Thanks! Greets, Stefan
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