|
On 5/21/2017 7:00 PM, Ravishankar N
wrote:
Great, that worked. ie gluster volume set VOL cluster.server-quorum-type none Although I did get an error of "Volume set: failed: Commit failed on localhost, please check the log files for more details" but then I noticed that volume immediately came back up and I was able to mount the single remaining node and access those files. So you need to do both settings in my scenario. Also, don't disable client quorum for arbiter volumes or you will end up corrupting the files. For instance, if the arbiter brick was the only one that is up, and you disabled client quorum, then a writev from the application will get a success but nothing will ever get written on-disk on the arbiter brick. Yes, I am learning the pro/cons of arbiter and understand their limitations. In this test case, I had taken the arbiter OFFLINE (deliberately) and I was rehearsing a scenario where only one of the two real copies survived and I needed that data. Hopefully that is an unlikely scenario and we would have backups, but I've earned the grey specs in my hair and the Original Poster who started this thread run into that exact scenario. On our older Gluster installs without sharding, the files are simply sitting there on the disk if you need them. That is enormously comforting and means you can be a little less paranoid compared to other distributed storage schemes we use/have used. But then I have my next question: Is it possible to recreate a large file (such as a VM image) from the raw shards outside of the Gluster environment if you only had the raw brick or volume data? From the docs, I see you can identify the shards by the GFID # getfattr -d -m. -e hex path_to_file# ls /bricks/*/.shard -lh | grep GFID Is there a gluster tool/script that will recreate the file? or can you just sort them sort them properly and then simply cat/copy+ them back together? cat shardGFID.1 .. shardGFID.X > thefile Thank You though, the sharding should be a big win. -bill |
_______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://lists.gluster.org/mailman/listinfo/gluster-users
