On 01/29/2013 05:34 AM, Joao Eduardo Luis wrote: > On 01/29/2013 11:25 AM, Chen, Xiaoxi wrote: >> [The following views only behalf of myself, not relate with Intel..] >> Looking forward for the performance data on Atom. >> Atom perform badly in Swift, but since Ceph is slightly efficient than Swift, it must be better. >> I have some concern about weather Atom can support such high throughput( you have 16 disks, assuming 50MB/s per disk, you would like to have 50*16 *2(include journal write)=1600MB/s ,together with corresponding network throughput, say 10GbE. The total IO throughput seems too high for Atom. Baidu (www.baidu.com) use Arm based storage node(not using ceph,but their own DFS), a node with a quad-core Arm together with 4 disks, and a 2U box can put up to 6 nodes, the 6 nodes share a 10Gb NIC. Although Atom is different with Arm, but you can take Baidu as a reference. >> >> >> -----Original Message----- >> From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel-owner@xxxxxxxxxxxxxxx] On Behalf Of Gandalf Corvotempesta >> Sent: 2013年1月29日 17:25 >> To: femi anjorin >> Cc: ceph-devel@xxxxxxxxxxxxxxx; Ross Turk >> Subject: Re: Ceph Production Environment Setup and Configurations? >> >> 2013/1/29 femi anjorin <femi.anjorin@xxxxxxxxx>: >>> CPU - Intel(R) Atom(TM) CPU D525 @ 1.80GHz >> >> Atom? For which kind of role ? >> -- >> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html >> N?叉??y??b??千v??)藓{.n?+???z鳐?ay? ???,j?f＂???? ?ア? ⒎?:+v????????赙zZ+????"?!tml= >> > > > FWIW, Wido had been testing Ceph on Atoms a while back. I don't know > what conclusions he reached, or even if he has already reached any > conclusions at all. I, for one, would be really interested in knowing > how well (or how poorly) Atoms deal with Ceph. > > Maybe Wido can share some thoughts on this one? :-) > > -Joao > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Just FYI, I don't expect you'll be able to get anywhere close to 10GbE performance on the Atom. You'll almost certainly be CPU bound long before that. I actually would be curious how much throughput you could push to those disks just doing straight fio tests and how much CPU overhead you'd see. I imagine you could max out the CPU without even having Ceph involved. I'm guessing you probably are going to be limited to about 0.75-1 OSD per atom core, and that's assuming that your network and SAS controllers aren't CPU hogs. Mark -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
