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From "Marcus Sorensen (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-6191) Volume provisioning type option
Date Sat, 01 Mar 2014 23:36:20 GMT


Marcus Sorensen commented on CLOUDSTACK-6191:

Is this is largely specific to QCOW2-based storage? I think many storage pool types either
aren't capable of some of these features, or don't make a distinction (e.g. thin is often
implemented by using sparse, or there may be a thin option on a storage type but no sparse).
At any rate, it's probably best implemented as a disk offering parameter, that way it doesn't
have to be selected globally, one could run any and all combinations. It would be similar
to the iops tuneables in the disk offerings, and passed along when volumes are created so
that individual storage drivers can choose whether or not to pay attention to the parameters.

> Volume provisioning type option
> -------------------------------
>                 Key: CLOUDSTACK-6191
>                 URL:
>             Project: CloudStack
>          Issue Type: Improvement
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: KVM, Management Server
>            Reporter: Yoshikazu Nojima
>            Assignee: Yoshikazu Nojima
>            Priority: Minor
>             Fix For: Future
> Thin provisioning of a volume saves consumption of a storage, and fat provisioning minimizes
IOPS performance overhead.
> This feature implements a global setting to provide users an option to select how to
provision volumes.
> Design doc:

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