* Re: [pve-devel] less cores more iops / speed [not found] <9c1ce666-795e-4611-8f2c-af1d85270533@mailpro> @ 2012-11-12 15:33 ` Stefan Priebe - Profihost AG [not found] ` <50A116DC.2020509-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> 2012-11-12 18:50 ` [pve-devel] " Josh Durgin 0 siblings, 2 replies; 4+ messages in thread From: Stefan Priebe - Profihost AG @ 2012-11-12 15:33 UTC (permalink / raw) To: Alexandre DERUMIER; +Cc: pve-devel, ceph-devel@vger.kernel.org Adding this to ceph.conf on kvm host adds another 2000 iops (20.000 iop/s with one VM). I'm sure most of them are useless on a client kvm / rbd host but i don't know which one makes sense ;-) [global] debug ms = 0/0 debug rbd = 0/0 debug lockdep = 0/0 debug context = 0/0 debug crush = 0/0 debug buffer = 0/0 debug timer = 0/0 debug journaler = 0/0 debug osd = 0/0 debug optracker = 0/0 debug objclass = 0/0 debug filestore = 0/0 debug journal = 0/0 debug ms = 0/0 debug monc = 0/0 debug tp = 0/0 debug auth = 0/0 debug finisher = 0/0 debug heartbeatmap = 0/0 debug perfcounter = 0/0 debug asok = 0/0 debug throttle = 0/0 [client] debug ms = 0/0 debug rbd = 0/0 debug lockdep = 0/0 debug context = 0/0 debug crush = 0/0 debug buffer = 0/0 debug timer = 0/0 debug journaler = 0/0 debug osd = 0/0 debug optracker = 0/0 debug objclass = 0/0 debug filestore = 0/0 debug journal = 0/0 debug ms = 0/0 debug monc = 0/0 debug tp = 0/0 debug auth = 0/0 debug finisher = 0/0 debug heartbeatmap = 0/0 debug perfcounter = 0/0 debug asok = 0/0 debug throttle = 0/0 Stefan Am 12.11.2012 15:35, schrieb Alexandre DERUMIER: > Another idea, > > do you have tried to put >>>>> debug lockdep = 0/0 >>>>> debug context = 0/0 >>>>> debug crush = 0/0 >>>>> debug buffer = 0/0 >>>>> debug timer = 0/0 >>>>> debug journaler = 0/0 >>>>> debug osd = 0/0 >>>>> debug optracker = 0/0 >>>>> debug objclass = 0/0 >>>>> debug filestore = 0/0 >>>>> debug journal = 0/0 >>>>> debug ms = 0/0 >>>>> debug monc = 0/0 >>>>> debug tp = 0/0 >>>>> debug auth = 0/0 >>>>> debug finisher = 0/0 >>>>> debug heartbeatmap = 0/0 >>>>> debug perfcounter = 0/0 >>>>> debug asok = 0/0 >>>>> debug throttle = 0/0 > > in a ceph.conf on your kvm host ? > > > ----- Mail original ----- > > De: "Alexandre DERUMIER" <aderumier@odiso.com> > À: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> > Cc: pve-devel@pve.proxmox.com > Envoyé: Lundi 12 Novembre 2012 15:26:36 > Objet: Re: [pve-devel] less cores more iops / speed > > Maybe some tracing on kvm process could give us clues to find where the cpu is used ? > > Also another idea, can you try with "auth supported=none" ? maybe they are some overhead with ceph authenfication ? > > > > > ----- Mail original ----- > > De: "Alexandre DERUMIER" <aderumier@odiso.com> > À: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> > Cc: pve-devel@pve.proxmox.com > Envoyé: Lundi 12 Novembre 2012 15:20:07 > Objet: Re: [pve-devel] less cores more iops / speed > > Ok thanks. > > Seem to use a lot of cpu vs nfs,iscsi ... > > I hope that ceph dev will work on this soon ! > > > ----- Mail original ----- > > De: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> > À: "Alexandre DERUMIER" <aderumier@odiso.com> > Cc: "eric" <eric@netwalk.com>, pve-devel@pve.proxmox.com > Envoyé: Lundi 12 Novembre 2012 15:05:08 > Objet: Re: [pve-devel] less cores more iops / speed > > Am 12.11.2012 13:49, schrieb Alexandre DERUMIER: >>>> One VM on one Host: 18.000 IOP/s >>>> Two VM on one Host: 2x11.000 IOP/s >>>> Three VM on one Host: 3x7.000 IOP/s >> >> And host cpu is 100% ? > > No. For three VMs yes. For one and two no. I think librbd / rbd > implementation in kvm is the bottleneck here. > > Stefan > >> ----- Mail original ----- >> >> De: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> >> À: "Alexandre DERUMIER" <aderumier@odiso.com> >> Cc: "eric" <eric@netwalk.com>, pve-devel@pve.proxmox.com >> Envoyé: Lundi 12 Novembre 2012 12:58:35 >> Objet: Re: [pve-devel] less cores more iops / speed >> >> Am 12.11.2012 08:51, schrieb Alexandre DERUMIER: >>>>> Right now RBD in KVM is limited by CPU speed. >>> >>> Good to known, so it's seem lack of threading, or maybe somes locks. (so faster cpu give more iops). >>> >>> If you lauch parallel fio on same host on different guest, do you get more total iops ? (for me it's scale) >> >> One VM on one Host: 18.000 IOP/s >> Two VM on one Host: 2x11.000 IOP/s >> Three VM on one Host: 3x7.000 IOP/s >> >>> if you launch 2 parallel fio, on same guest (on differents disk), do you get more iops ? (for me, it doesn't scale, so raid0 in guest doesn't help). >> No it doesn't scale. >> >> Stefan >> >>> ----- Mail original ----- >>> >>> De: "Stefan Priebe" <s.priebe@profihost.ag> >>> À: "Alexandre DERUMIER" <aderumier@odiso.com> >>> Cc: "eric" <eric@netwalk.com>, pve-devel@pve.proxmox.com >>> Envoyé: Dimanche 11 Novembre 2012 13:07:36 >>> Objet: Re: [pve-devel] less cores more iops / speed >>> >>> Am 11.11.2012 12:12, schrieb Alexandre DERUMIER: >>>> If I remember good, stefan can achieve 100.000 iops with iscsi with same kvm host. >>> >>> Correct but this was always with scsi-generic and I/O multipathing on >>> host. rbd does not support scsi-generic ;-( >>> >>>> I have checked ceph mailing, stefan seem to have resolved his problem with dual core with bios update ! >>> Correct. So speed on Dual Xeon is now 14.000 IOP/s and 18.000 IOP/s on >>> Single Xeon. But the difference is an issue of the CPU Speed. 3,6Ghz >>> Single Xeon vs. 2.5Ghz Dual Xeon. >>> >>> Right now RBD in KVM is limited by CPU speed. >>> >>> Greets, >>> Stefan >>> > _______________________________________________ > pve-devel mailing list > pve-devel@pve.proxmox.com > http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel > _______________________________________________ > pve-devel mailing list > pve-devel@pve.proxmox.com > http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 4+ messages in thread
[parent not found: <50A116DC.2020509-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org>]
* Re: less cores more iops / speed [not found] ` <50A116DC.2020509-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> @ 2012-11-12 15:39 ` Alexandre DERUMIER 0 siblings, 0 replies; 4+ messages in thread From: Alexandre DERUMIER @ 2012-11-12 15:39 UTC (permalink / raw) To: Stefan Priebe - Profihost AG Cc: ceph-devel-u79uwXL29TY76Z2rM5mHXA, pve-devel-KmHT29P9Uc/4CZzEM2C48g [-- Attachment #1.1.1: Type: text/plain, Size: 6603 bytes --] maybe this is debug perfcounter ? ----- Mail original ----- De: "Stefan Priebe - Profihost AG" <s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> À: "Alexandre DERUMIER" <aderumier-U/x3PoR4x10AvxtiuMwx3w@public.gmane.org> Cc: pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org, ceph-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Envoyé: Lundi 12 Novembre 2012 16:33:48 Objet: Re: [pve-devel] less cores more iops / speed Adding this to ceph.conf on kvm host adds another 2000 iops (20.000 iop/s with one VM). I'm sure most of them are useless on a client kvm / rbd host but i don't know which one makes sense ;-) [global] debug ms = 0/0 debug rbd = 0/0 debug lockdep = 0/0 debug context = 0/0 debug crush = 0/0 debug buffer = 0/0 debug timer = 0/0 debug journaler = 0/0 debug osd = 0/0 debug optracker = 0/0 debug objclass = 0/0 debug filestore = 0/0 debug journal = 0/0 debug ms = 0/0 debug monc = 0/0 debug tp = 0/0 debug auth = 0/0 debug finisher = 0/0 debug heartbeatmap = 0/0 debug perfcounter = 0/0 debug asok = 0/0 debug throttle = 0/0 [client] debug ms = 0/0 debug rbd = 0/0 debug lockdep = 0/0 debug context = 0/0 debug crush = 0/0 debug buffer = 0/0 debug timer = 0/0 debug journaler = 0/0 debug osd = 0/0 debug optracker = 0/0 debug objclass = 0/0 debug filestore = 0/0 debug journal = 0/0 debug ms = 0/0 debug monc = 0/0 debug tp = 0/0 debug auth = 0/0 debug finisher = 0/0 debug heartbeatmap = 0/0 debug perfcounter = 0/0 debug asok = 0/0 debug throttle = 0/0 Stefan Am 12.11.2012 15:35, schrieb Alexandre DERUMIER: > Another idea, > > do you have tried to put >>>>> debug lockdep = 0/0 >>>>> debug context = 0/0 >>>>> debug crush = 0/0 >>>>> debug buffer = 0/0 >>>>> debug timer = 0/0 >>>>> debug journaler = 0/0 >>>>> debug osd = 0/0 >>>>> debug optracker = 0/0 >>>>> debug objclass = 0/0 >>>>> debug filestore = 0/0 >>>>> debug journal = 0/0 >>>>> debug ms = 0/0 >>>>> debug monc = 0/0 >>>>> debug tp = 0/0 >>>>> debug auth = 0/0 >>>>> debug finisher = 0/0 >>>>> debug heartbeatmap = 0/0 >>>>> debug perfcounter = 0/0 >>>>> debug asok = 0/0 >>>>> debug throttle = 0/0 > > in a ceph.conf on your kvm host ? > > > ----- Mail original ----- > > De: "Alexandre DERUMIER" <aderumier-U/x3PoR4x10AvxtiuMwx3w@public.gmane.org> > À: "Stefan Priebe - Profihost AG" <s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> > Cc: pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org > Envoyé: Lundi 12 Novembre 2012 15:26:36 > Objet: Re: [pve-devel] less cores more iops / speed > > Maybe some tracing on kvm process could give us clues to find where the cpu is used ? > > Also another idea, can you try with "auth supported=none" ? maybe they are some overhead with ceph authenfication ? > > > > > ----- Mail original ----- > > De: "Alexandre DERUMIER" <aderumier-U/x3PoR4x10AvxtiuMwx3w@public.gmane.org> > À: "Stefan Priebe - Profihost AG" <s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> > Cc: pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org > Envoyé: Lundi 12 Novembre 2012 15:20:07 > Objet: Re: [pve-devel] less cores more iops / speed > > Ok thanks. > > Seem to use a lot of cpu vs nfs,iscsi ... > > I hope that ceph dev will work on this soon ! > > > ----- Mail original ----- > > De: "Stefan Priebe - Profihost AG" <s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> > À: "Alexandre DERUMIER" <aderumier-U/x3PoR4x10AvxtiuMwx3w@public.gmane.org> > Cc: "eric" <eric-9y2FTvk76rRBDgjK7y7TUQ@public.gmane.org>, pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org > Envoyé: Lundi 12 Novembre 2012 15:05:08 > Objet: Re: [pve-devel] less cores more iops / speed > > Am 12.11.2012 13:49, schrieb Alexandre DERUMIER: >>>> One VM on one Host: 18.000 IOP/s >>>> Two VM on one Host: 2x11.000 IOP/s >>>> Three VM on one Host: 3x7.000 IOP/s >> >> And host cpu is 100% ? > > No. For three VMs yes. For one and two no. I think librbd / rbd > implementation in kvm is the bottleneck here. > > Stefan > >> ----- Mail original ----- >> >> De: "Stefan Priebe - Profihost AG" <s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> >> À: "Alexandre DERUMIER" <aderumier-U/x3PoR4x10AvxtiuMwx3w@public.gmane.org> >> Cc: "eric" <eric-9y2FTvk76rRBDgjK7y7TUQ@public.gmane.org>, pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org >> Envoyé: Lundi 12 Novembre 2012 12:58:35 >> Objet: Re: [pve-devel] less cores more iops / speed >> >> Am 12.11.2012 08:51, schrieb Alexandre DERUMIER: >>>>> Right now RBD in KVM is limited by CPU speed. >>> >>> Good to known, so it's seem lack of threading, or maybe somes locks. (so faster cpu give more iops). >>> >>> If you lauch parallel fio on same host on different guest, do you get more total iops ? (for me it's scale) >> >> One VM on one Host: 18.000 IOP/s >> Two VM on one Host: 2x11.000 IOP/s >> Three VM on one Host: 3x7.000 IOP/s >> >>> if you launch 2 parallel fio, on same guest (on differents disk), do you get more iops ? (for me, it doesn't scale, so raid0 in guest doesn't help). >> No it doesn't scale. >> >> Stefan >> >>> ----- Mail original ----- >>> >>> De: "Stefan Priebe" <s.priebe-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> >>> À: "Alexandre DERUMIER" <aderumier-U/x3PoR4x10AvxtiuMwx3w@public.gmane.org> >>> Cc: "eric" <eric-9y2FTvk76rRBDgjK7y7TUQ@public.gmane.org>, pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org >>> Envoyé: Dimanche 11 Novembre 2012 13:07:36 >>> Objet: Re: [pve-devel] less cores more iops / speed >>> >>> Am 11.11.2012 12:12, schrieb Alexandre DERUMIER: >>>> If I remember good, stefan can achieve 100.000 iops with iscsi with same kvm host. >>> >>> Correct but this was always with scsi-generic and I/O multipathing on >>> host. rbd does not support scsi-generic ;-( >>> >>>> I have checked ceph mailing, stefan seem to have resolved his problem with dual core with bios update ! >>> Correct. So speed on Dual Xeon is now 14.000 IOP/s and 18.000 IOP/s on >>> Single Xeon. But the difference is an issue of the CPU Speed. 3,6Ghz >>> Single Xeon vs. 2.5Ghz Dual Xeon. >>> >>> Right now RBD in KVM is limited by CPU speed. >>> >>> Greets, >>> Stefan >>> > _______________________________________________ > pve-devel mailing list > pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org > http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel > _______________________________________________ > pve-devel mailing list > pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org > http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel > [-- Attachment #2: Type: text/plain, Size: 179 bytes --] _______________________________________________ pve-devel mailing list pve-devel-KmHT29P9Uc/4CZzEM2C48g@public.gmane.org http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [pve-devel] less cores more iops / speed 2012-11-12 15:33 ` [pve-devel] less cores more iops / speed Stefan Priebe - Profihost AG [not found] ` <50A116DC.2020509-2Lf/h1ldwEHR5kwTpVNS9A@public.gmane.org> @ 2012-11-12 18:50 ` Josh Durgin 2012-11-12 19:12 ` Stefan Priebe 1 sibling, 1 reply; 4+ messages in thread From: Josh Durgin @ 2012-11-12 18:50 UTC (permalink / raw) To: Stefan Priebe - Profihost AG Cc: Alexandre DERUMIER, pve-devel, ceph-devel@vger.kernel.org On 11/12/2012 07:33 AM, Stefan Priebe - Profihost AG wrote: > Adding this to ceph.conf on kvm host adds another 2000 iops (20.000 > iop/s with one VM). I'm sure most of them are useless on a client kvm / > rbd host but i don't know which one makes sense ;-) > > [global] > debug ms = 0/0 > debug rbd = 0/0 > debug lockdep = 0/0 > debug context = 0/0 > debug crush = 0/0 > debug buffer = 0/0 > debug timer = 0/0 > debug journaler = 0/0 > debug osd = 0/0 > debug optracker = 0/0 > debug objclass = 0/0 > debug filestore = 0/0 > debug journal = 0/0 > debug ms = 0/0 > debug monc = 0/0 > debug tp = 0/0 > debug auth = 0/0 > debug finisher = 0/0 > debug heartbeatmap = 0/0 > debug perfcounter = 0/0 > debug asok = 0/0 > debug throttle = 0/0 > > [client] For the client side you'd these settings to disable all debug logging: [client] debug lockdep = 0/0 debug context = 0/0 debug crush = 0/0 debug buffer = 0/0 debug timer = 0/0 debug filer = 0/0 debug objecter = 0/0 debug rados = 0/0 debug rbd = 0/0 debug objectcacher = 0/0 debug client = 0/0 debug ms = 0/0 debug monc = 0/0 debug tp = 0/0 debug auth = 0/0 debug finisher = 0/0 debug perfcounter = 0/0 debug asok = 0/0 debug throttle = 0/0 Josh > debug ms = 0/0 > debug rbd = 0/0 > debug lockdep = 0/0 > debug context = 0/0 > debug crush = 0/0 > debug buffer = 0/0 > debug timer = 0/0 > debug journaler = 0/0 > debug osd = 0/0 > debug optracker = 0/0 > debug objclass = 0/0 > debug filestore = 0/0 > debug journal = 0/0 > debug ms = 0/0 > debug monc = 0/0 > debug tp = 0/0 > debug auth = 0/0 > debug finisher = 0/0 > debug heartbeatmap = 0/0 > debug perfcounter = 0/0 > debug asok = 0/0 > debug throttle = 0/0 > > Stefan > > Am 12.11.2012 15:35, schrieb Alexandre DERUMIER: >> Another idea, >> >> do you have tried to put >>>>>> debug lockdep = 0/0 >>>>>> debug context = 0/0 >>>>>> debug crush = 0/0 >>>>>> debug buffer = 0/0 >>>>>> debug timer = 0/0 >>>>>> debug journaler = 0/0 >>>>>> debug osd = 0/0 >>>>>> debug optracker = 0/0 >>>>>> debug objclass = 0/0 >>>>>> debug filestore = 0/0 >>>>>> debug journal = 0/0 >>>>>> debug ms = 0/0 >>>>>> debug monc = 0/0 >>>>>> debug tp = 0/0 >>>>>> debug auth = 0/0 >>>>>> debug finisher = 0/0 >>>>>> debug heartbeatmap = 0/0 >>>>>> debug perfcounter = 0/0 >>>>>> debug asok = 0/0 >>>>>> debug throttle = 0/0 >> >> in a ceph.conf on your kvm host ? >> >> >> ----- Mail original ----- >> >> De: "Alexandre DERUMIER" <aderumier@odiso.com> >> À: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> >> Cc: pve-devel@pve.proxmox.com >> Envoyé: Lundi 12 Novembre 2012 15:26:36 >> Objet: Re: [pve-devel] less cores more iops / speed >> >> Maybe some tracing on kvm process could give us clues to find where >> the cpu is used ? >> >> Also another idea, can you try with "auth supported=none" ? maybe they >> are some overhead with ceph authenfication ? >> >> >> >> >> ----- Mail original ----- >> >> De: "Alexandre DERUMIER" <aderumier@odiso.com> >> À: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> >> Cc: pve-devel@pve.proxmox.com >> Envoyé: Lundi 12 Novembre 2012 15:20:07 >> Objet: Re: [pve-devel] less cores more iops / speed >> >> Ok thanks. >> >> Seem to use a lot of cpu vs nfs,iscsi ... >> >> I hope that ceph dev will work on this soon ! >> >> >> ----- Mail original ----- >> >> De: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> >> À: "Alexandre DERUMIER" <aderumier@odiso.com> >> Cc: "eric" <eric@netwalk.com>, pve-devel@pve.proxmox.com >> Envoyé: Lundi 12 Novembre 2012 15:05:08 >> Objet: Re: [pve-devel] less cores more iops / speed >> >> Am 12.11.2012 13:49, schrieb Alexandre DERUMIER: >>>>> One VM on one Host: 18.000 IOP/s >>>>> Two VM on one Host: 2x11.000 IOP/s >>>>> Three VM on one Host: 3x7.000 IOP/s >>> >>> And host cpu is 100% ? >> >> No. For three VMs yes. For one and two no. I think librbd / rbd >> implementation in kvm is the bottleneck here. >> >> Stefan >> >>> ----- Mail original ----- >>> >>> De: "Stefan Priebe - Profihost AG" <s.priebe@profihost.ag> >>> À: "Alexandre DERUMIER" <aderumier@odiso.com> >>> Cc: "eric" <eric@netwalk.com>, pve-devel@pve.proxmox.com >>> Envoyé: Lundi 12 Novembre 2012 12:58:35 >>> Objet: Re: [pve-devel] less cores more iops / speed >>> >>> Am 12.11.2012 08:51, schrieb Alexandre DERUMIER: >>>>>> Right now RBD in KVM is limited by CPU speed. >>>> >>>> Good to known, so it's seem lack of threading, or maybe somes locks. >>>> (so faster cpu give more iops). >>>> >>>> If you lauch parallel fio on same host on different guest, do you >>>> get more total iops ? (for me it's scale) >>> >>> One VM on one Host: 18.000 IOP/s >>> Two VM on one Host: 2x11.000 IOP/s >>> Three VM on one Host: 3x7.000 IOP/s >>> >>>> if you launch 2 parallel fio, on same guest (on differents disk), do >>>> you get more iops ? (for me, it doesn't scale, so raid0 in guest >>>> doesn't help). >>> No it doesn't scale. >>> >>> Stefan >>> >>>> ----- Mail original ----- >>>> >>>> De: "Stefan Priebe" <s.priebe@profihost.ag> >>>> À: "Alexandre DERUMIER" <aderumier@odiso.com> >>>> Cc: "eric" <eric@netwalk.com>, pve-devel@pve.proxmox.com >>>> Envoyé: Dimanche 11 Novembre 2012 13:07:36 >>>> Objet: Re: [pve-devel] less cores more iops / speed >>>> >>>> Am 11.11.2012 12:12, schrieb Alexandre DERUMIER: >>>>> If I remember good, stefan can achieve 100.000 iops with iscsi with >>>>> same kvm host. >>>> >>>> Correct but this was always with scsi-generic and I/O multipathing on >>>> host. rbd does not support scsi-generic ;-( >>>> >>>>> I have checked ceph mailing, stefan seem to have resolved his >>>>> problem with dual core with bios update ! >>>> Correct. So speed on Dual Xeon is now 14.000 IOP/s and 18.000 IOP/s on >>>> Single Xeon. But the difference is an issue of the CPU Speed. 3,6Ghz >>>> Single Xeon vs. 2.5Ghz Dual Xeon. >>>> >>>> Right now RBD in KVM is limited by CPU speed. >>>> >>>> Greets, >>>> Stefan >>>> >> _______________________________________________ >> pve-devel mailing list >> pve-devel@pve.proxmox.com >> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel >> _______________________________________________ >> pve-devel mailing list >> pve-devel@pve.proxmox.com >> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel >> > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [pve-devel] less cores more iops / speed 2012-11-12 18:50 ` [pve-devel] " Josh Durgin @ 2012-11-12 19:12 ` Stefan Priebe 0 siblings, 0 replies; 4+ messages in thread From: Stefan Priebe @ 2012-11-12 19:12 UTC (permalink / raw) To: Josh Durgin; +Cc: Alexandre DERUMIER, pve-devel, ceph-devel@vger.kernel.org Hi Josh, > For the client side you'd these settings to disable all debug logging: ... Thanks! Stefan ^ permalink raw reply [flat|nested] 4+ messages in thread
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2012-11-12 15:33 ` [pve-devel] less cores more iops / speed Stefan Priebe - Profihost AG
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2012-11-12 15:39 ` Alexandre DERUMIER
2012-11-12 18:50 ` [pve-devel] " Josh Durgin
2012-11-12 19:12 ` Stefan Priebe
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