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I use single disks as a physical volume. Each gluster host is identical. As more space is needed for a mount point, a set of disks is added to the logical volume of each host. As my primary need is HA, all of my host nodes are simply replicates. Prior to this config I had a physical raid6 array of 100TB on each host. Lost 3 drives on the same array out of just bad luck. 2 drives died and while replacing them, the third failed. The subsequent rebuild took months By splitting each mount point into separate physical drives, my plan is to lessen rebuild time. Rebuilding a failed 24TB chunk that had 3 drives fail should take less time than another 100+TB rebuild that slows everyone down. I also added a third host node to retain quorum in the event of a failure. As these are mounts are for independent research groups, they can acquire additional storage by simply buying a triplet of drives. To mitigate drive batch failures, we buy from different vendors and 2 different brands of drives. On August 24, 2018 5:45:15 PM EDT, Brian Andrus <toomuchit@xxxxxxxxx> wrote: You can do that, but you could run into issues with the 'shared' remaining space. Any one of the volumes could eat up the space you planned on using in another volume. Not a huge issue, but could bite you. -- Sent from my Android device with K-9 Mail. All tyopes are thumb related and reflect authenticity. |
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