I would suggest using different partitions for each brick. We use LVM and start off with a relativity small amount allocated space, then grow the partitions as needed. If you were to place 2 bricks on the same partition then the free space is not going to show correctly. Example: 1TB partition 2 bricks on this partition brick: vol-1-a using 200GB brick: vol-2-a using 300GB. Both volumes would show that they have ~500GB free, but in reality there would be ~500GB that either could use. I don't know if there would be any other issues with putting 2 or more bricks on the same partition, but it doesn't seem like a good idea. I had gluster setup that way when I was first testing it, and it seemed to work other than the free space issue, but I quickly realized it would be better to separate out the bricks on to their own partition. Using LVM allows you to easily grow partitions as needed. my 2 cents. On 11/12/13, 9:31 AM, David Gibbons wrote: > Hi All, > > I am interested in some feedback on putting multiple bricks on one > physical disk. Each brick being assigned to a different volume. Here > is the scenario: > > 4 disks per server, 4 servers, 2x2 distribute/replicate > > I would prefer to have just one volume but need to do geo-replication > on some of the data (but not all of it). My thought was to use two > volumes, which would allow me to selectively geo-replicate just the > data that I need to, by replicating only one volume. > > A couple of questions come to mind: > 1) Any implications of doing two bricks for different volumes on one > physical disk? > 2) Will the "free space" across each volume still calculate correctly? > IE, if one volume takes up 2/3 of the total physical disk space, will > the second volume still reflect the correct amount of used space? > 3) Am I being stupid/missing something obvious? > > Cheers, > Dave > > > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://supercolony.gluster.org/mailman/listinfo/gluster-users -- Eric Johnson 713-968-2546 VP of MIS Internet America www.internetamerica.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://supercolony.gluster.org/pipermail/gluster-users/attachments/20131112/94bd7e71/attachment.html>
