Volumes are aggregation of bricks, so I would consider bricks as a unique entity here rather than volumes. Taking the constraints from the blog [1]. * All bricks should be carved out from an independent thinly provisioned logical volume (LV). In other words, no two brick should share a common LV. More details about thin provisioning and thin provisioned snapshot can be found here. * This thinly provisioned LV should only be used for forming a brick. * Thin pool from which the thin LVs are created should have sufficient space and also it should have sufficient space for pool metadata. You can refer the blog post here [1]. [1] : http://rajesh-joseph.blogspot.in/p/gluster-volume-snapshot-howto.html Regards Rafi KC On 10/11/2017 01:23 PM, ML wrote: > Thanks Rafi, that's understood now :) > > I'm considering to deploy gluster on a 4 x 40 TB bricks, do you think > it would better to make 1 LVM partition for each Volume I need or to > make one Big LVM partition and start multiple volumes on it ? > > We'll store mostly big files (videos) on this environement. > > > > > Le 11/10/2017 à 09:34, Mohammed Rafi K C a écrit : >> >> 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 >>> >>> >>> _______________________________________________ >>> Gluster-users mailing list >>> Gluster-users@xxxxxxxxxxx >>> http://lists.gluster.org/mailman/listinfo/gluster-users > _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://lists.gluster.org/mailman/listinfo/gluster-users
