[Gluster-users] gluster volume + lvm : recommendation or neccessity ?

[Mohammed Rafi K C]

On 10/11/2017 12:20 PM, ML wrote:
> Hi everyone,
>
> I've read on the gluster & redhat documentation, that it seems
> recommended to use XFS over LVM before creating & using gluster volumes.
>
> Sources :
> https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3/html/Administration_Guide/Formatting_and_Mounting_Bricks.html
>
> http://gluster.readthedocs.io/en/latest/Administrator%20Guide/Setting%20Up%20Volumes/
>
>
> My point is : do we really need LVM ?

This recommendations was added after gluster-snapshot. Gluster snapshot
relays on LVM snapshot. So if you start with out lvm, in future if you
want to use snapshot then it would be difficult, hence the
recommendation to use xfs on top of lvm. 


Regards
Rafi KC

> For example , on a dedicated server with disks & partitions that will
> not change of size, it doesn't seems necessary to use LVM.
>
> I can't understand clearly wich partitioning strategy would be the
> best for "static size" hard drives :
>
> 1 LVM+XFS partition = multiple gluster volumes
> or 1 LVM+XFS partition = 1 gluster volume per LVM+XFS partition
> or 1 XFS partition = multiple gluster volumes
> or 1 XFS partition = 1 gluster volume per XFS partition
>
> What do you use on your servers ?
>
> Thanks for your help! :)
>
> Quentin
>
>
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