Le 11/09/2015 00:20, Robert LeBlanc a écrit : > I don't think the script will help our situation as it is just setting > osd_max_backfill from 1 to 0. It looks like that change doesn't go > into effect until after it finishes the PG.
That was what I was afraid of. Note that it should help a little anyway (if not that's worrying, setting backfills to 0 completely should solve your clients IO problems in a matter of minutes). You may have better results by allowing backfills on only a few of your OSD at a time. For example deep-scrubs were a problem on our installation when at times there were several going on. We implemented a scheduler that enforces limits on simultaneous deep-scrubs and these problems are gone. That's a last resort and rough around the edges but if every other means of reducing the impact on your clients has failed, that's the best you can hope for. Lionel _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
