2.6.18, not sure about the IO schedulers. The default scheduler could be different. Is the expected performance between the schedulers supposed to be that dramatically different?
Mukul -----Original Message----- From: Jones, Richard (Mr. Netperf) Sent: Tuesday, December 10, 2013 4:17 PM To: Kotwani, Mukul; Pete Zaitcev Cc: OpenStack Mailing List Subject: Re: [Openstack] [Swift] Swift on RHEL On 12/10/2013 04:12 PM, Rick Jones wrote: > On 12/10/2013 03:23 PM, Kotwani, Mukul wrote: >> A new piece of data.. >> >> We used the disable_fallocate configurable on Ubuntu, and the numbers >> do reduce, but they are nowhere near the numbers for Redhat (5.8). >> >> As an example, for a specific test: >> PUT for Ubuntu, default parameters: ~140 ops/sec PUT for Ubuntu, >> disable_fallocate=true: ~100 ops/sec PUT for Redhat 5.8, default >> parameters: ~15 ops/sec >> >> Has anyone seen this? We are not able to find anything that can >> explain this kind of discrepancy. FYI, this is the same hardware(we >> are switching between Ubuntu and RH, to keep things the same) and >> software(Swift and xfs, same versions for both), same ring >> configuration, same test scripts. It seems like Ubuntu is far ahead, >> and we don't have any root cause ATM. PUTs are written though to the >> disk and not cached, so I am not sure what to attribute this to. > > Are RH 5.8 (2.6.32 with assorted backports) Or is that 2.6.18 and backports? I may have been thinking of RHEL6. rick jones > and what you later say is > Ubuntu 13.04 (3.8 kernel?) using the same I/O scheduler in their drivers? > > rick jones > > >> >> Has anyone run Swift on RH and done comparisons with Ubuntu? >> >> Any help/pointers would be great! >> >> Thanks, >> Mukul >> >> >> -----Original Message----- >> From: Kotwani, Mukul >> Sent: Thursday, December 05, 2013 6:44 PM >> To: Pete Zaitcev >> Cc: OpenStack Mailing List >> Subject: Re: [Openstack] [Swift] Swift on RHEL >> >> Thanks Pete! >> >> We were using Grizzly, which is over a release old, with Folsom >> Keystone for RHEL. So not recent at all. Is there something that >> would be missing in RHEL5.x which would cause performance issues? I >> saw some references to fallocate, but not much beyond that. Is this >> something you would expect to see? >> >> Which was the first RHEL release was Swift supported on officially? >> I tried to find a support matrix or supportable platforms but could >> not find anything.. >> >> Mukul >> >> -----Original Message----- >> From: Pete Zaitcev [mailto:zait...@redhat.com] >> Sent: Thursday, December 05, 2013 4:36 PM >> To: Kotwani, Mukul >> Cc: OpenStack Mailing List >> Subject: Re: [Openstack] [Swift] Swift on RHEL >> >> On Thu, 5 Dec 2013 21:19:49 +0000 >> "Kotwani, Mukul" <mukul.g.kotw...@hp.com> wrote: >> >>> Has anyone used and/or deployed RHEL (5.8) with Swift? >>> I was also looking for a "Supported platforms" for Swift, and I >>> could not find it. >> >> I don't think an RDO for RHEL 5.x ever existed. First packages were >> built a year after RHEL 6 GA shipped. The oldest build in Koji is >> openstack-swift-1.0.2-5.fc15 (a community build by Silas), and the >> oldest RHOS build is openstack-swift-1.4.8-2.el6 from 2012. >> >> Frankly I'm surprised you managed to get it running at all. (Which >> Swift release is that, BTW? We even require PBR nowadays.) >> >> I dimly remember bothering with XFS for RHEL 5, but it was so long >> ago that I cannot even remember if I got that cluster to do anything useful. >> >> -- Pete >> >> _______________________________________________ >> Mailing list: >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> Post to : openstack@lists.openstack.org >> Unsubscribe : >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> >> _______________________________________________ >> Mailing list: >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> Post to : openstack@lists.openstack.org >> Unsubscribe : >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> > _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
