From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Mueller Subject: Re: pg 0.xxxx on [] is laggy Date: Wed, 30 Jun 2010 15:45:48 +0000 (UTC) Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from lo.gmane.org ([80.91.229.12]:41642 "EHLO lo.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754150Ab0F3Pp5 (ORCPT ); Wed, 30 Jun 2010 11:45:57 -0400 Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1OTzU3-0004xN-UO for ceph-devel@vger.kernel.org; Wed, 30 Jun 2010 17:45:55 +0200 Received: from 80-219-106-215.dclient.hispeed.ch ([80.219.106.215]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 30 Jun 2010 17:45:55 +0200 Received: from thomas by 80-219-106-215.dclient.hispeed.ch with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 30 Jun 2010 17:45:55 +0200 Sender: ceph-devel-owner@vger.kernel.org List-ID: To: ceph-devel@vger.kernel.org Am Wed, 30 Jun 2010 14:05:34 +0200 schrieb S=C3=A9bastien Paolacci: > Hello Sage, >=20 > It actually works better when removing the old deb pacakge;)... thank= s! >=20 > The "pg 0.xxxx on [] is laggy" messages have also now disappeared. >=20 > Here is, just for information, the obtained two processes dbench outp= ut > (which is not so bad given the vm the system in running into): Operat= ion > Count AvgLat MaxLat > ---------------------------------------- NTCreateX 1632 8.= 835 > 213.966 Close 1237 0.377 157.360 Rename = 73 > 24.290 195.969 Unlink 291 6.514 244.166 Qpathin= fo=20 > 1455 4.544 237.949 Qfileinfo 311 0.233 5.7= 23 > Qfsinfo 270 1.854 110.355 Sfileinfo 168 3.= 090 > 34.291 Find 552 11.182 192.610 WriteX 1= 076 > 4.916 409.798 ReadX 2437 0.408 61.635 LockX = =20 > 4 0.011 0.017 UnlockX 4 0.006 0.0= 09 > Flush 140 8.630 175.423 >=20 > Throughput 2.88849 MB/sec 2 clients 2 procs max_latency=3D409.805 = ms >=20 > I however get the a bunch of metadata sync warnings on the cfuse side > "10.06.30_13:16:20.556187 7f2bc5817720 client4100 fsync - not syncing > metadata yet.. implement me" give the kclient a try? git://ceph.newdream.net/ceph-client- standalone.git branch unstable-backport for use with "older" kernels. > [osd] > debug ms =3D 1 > sudo =3D true > osd data =3D /data/osd$id > osd journal =3D /ceph-journal/osd$id why not let ceph manage the whole partition without a fs inbetween ? li= ke osd journal =3D /dev/sdX1 (and remove "journal size") > filestore journal writeahead =3D true seems to be true by default (http://ceph.newdream.net/wiki/Ceph.conf ->= =20 filestore_journal_parallel) - Thomas -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html