[Gluster-users] gluster volume + lvm : recommendation or neccessity ?
lists at websiteburo.com
Wed Oct 11 13:37:44 UTC 2017
After some extra reading about LVM snapshots & Gluster, I think I can
conclude it may be a bad idea to use it on big storage bricks.
I understood that the LVM maximum metadata, used to store the snapshots
data, is about 16GB.
So if I have a brick with a volume arount 10TB (for example), daily
snapshots, files changing ~100GB : the LVM snapshot is useless.
LVM's snapshots doesn't seems to be a good idea with very big LVM
Did I missed something ? Hard to find clear documentation on the subject.
Le 11/10/2017 à 09:07, Ric Wheeler a écrit :
> On 10/11/2017 09:50 AM, 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 :
>> My point is : do we really need LVM ?
>> 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! :)
> Hi Quentin,
> Gluster relies on LVM for snapshots - you won't get those unless you
> deploy on LVM.
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