Thanks Gregory, One point that was a bit unclear in documentation is whether or not this equation for PGs applies to a single pool, or the entirety of pools. Meaning, if I calculate 3000 PGs, should each pool have 3000 PGs or should all the pools ADD UP to 3000 PGs? Thanks! -- Kevin Weiler IT IMC Financial Markets | 233 S. Wacker Drive, Suite 4300 | Chicago, IL 60606 | http://imc-chicago.com/ Phone: +1 312-204-7439 | Fax: +1 312-244-3301 | E-Mail: kevin.weiler@xxxxxxxxxxxxxxx On 11/7/13 9:59 PM, "Gregory Farnum" <greg@xxxxxxxxxxx> wrote: >It sounds like maybe your PG counts on your pools are too low and so >you're just getting a bad balance. If that's the case, you can >increase the PG count with "ceph osd pool <name> set pgnum <higher >value>". > >OSDs should get data approximately equal to <node weight>/<sum of node >weights>, so higher weights get more data and all its associated >traffic. >-Greg >Software Engineer #42 @ http://inktank.com | http://ceph.com > > >On Tue, Nov 5, 2013 at 8:30 AM, Kevin Weiler ><Kevin.Weiler@xxxxxxxxxxxxxxx> wrote: >> All of the disks in my cluster are identical and therefore all have the >>same >> weight (each drive is 2TB and the automatically generated weight is >>1.82 for >> each one). >> >> Would the procedure here be to reduce the weight, let it rebal, and >>then put >> the weight back to where it was? >> >> >> -- >> >> Kevin Weiler >> >> IT >> >> >> >> IMC Financial Markets | 233 S. Wacker Drive, Suite 4300 | Chicago, IL >>60606 >> | http://imc-chicago.com/ >> >> Phone: +1 312-204-7439 | Fax: +1 312-244-3301 | E-Mail: >> kevin.weiler@xxxxxxxxxxxxxxx >> >> >> From: <Aronesty>, Erik <earonesty@xxxxxxxxxxxxxxxxxxxxxx> >> Date: Tuesday, November 5, 2013 10:27 AM >> To: Greg Chavez <greg.chavez@xxxxxxxxx>, Kevin Weiler >> <kevin.weiler@xxxxxxxxxxxxxxx> >> Cc: "ceph-users@xxxxxxxxxxxxxx" <ceph-users@xxxxxxxxxxxxxx> >> Subject: RE: near full osd >> >> If there¹s an underperforming disk, why on earth would more data be put >>on >> it? You¹d think it would be lessŠ. I would think an overperforming >>disk >> should (desirably) cause that case,right? >> >> >> >> From: ceph-users-bounces@xxxxxxxxxxxxxx >> [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Greg Chavez >> Sent: Tuesday, November 05, 2013 11:20 AM >> To: Kevin Weiler >> Cc: ceph-users@xxxxxxxxxxxxxx >> Subject: Re: near full osd >> >> >> >> Kevin, in my experience that usually indicates a bad or underperforming >> disk, or a too-high priority. Try running "ceph osd crush reweight >>osd.<##> >> 1.0. If that doesn't do the trick, you may want to just out that guy. >> >> >> >> I don't think the crush algorithm guarantees balancing things out in >>the way >> you're expecting. >> >> >> >> --Greg >> >> On Tue, Nov 5, 2013 at 11:11 AM, Kevin Weiler >><Kevin.Weiler@xxxxxxxxxxxxxxx> >> wrote: >> >> Hi guys, >> >> >> >> I have an OSD in my cluster that is near full at 90%, but we're using a >> little less than half the available storage in the cluster. Shouldn't >>this >> be balanced out? >> >> >> >> -- >> >> Kevin Weiler >> >> IT >> >> >> >> IMC Financial Markets | 233 S. Wacker Drive, Suite 4300 | Chicago, IL >>60606 >> | http://imc-chicago.com/ >> >> Phone: +1 312-204-7439 | Fax: +1 312-244-3301 | E-Mail: >> kevin.weiler@xxxxxxxxxxxxxxx >> >> >> >> ________________________________ >> >> >> The information in this e-mail is intended only for the person or >>entity to >> which it is addressed. >> >> It may contain confidential and /or privileged material. If someone >>other >> than the intended recipient should receive this e-mail, he / she shall >>not >> be entitled to read, disseminate, disclose or duplicate it. >> >> If you receive this e-mail unintentionally, please inform us >>immediately by >> "reply" and then delete it from your system. 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