> On 19 Mar 2015, at 08:17, Christian Balzer <chibi@xxxxxxx> wrote: > > On Wed, 18 Mar 2015 08:59:14 +0100 Josef Johansson wrote: > >> Hi, >> >>> On 18 Mar 2015, at 05:29, Christian Balzer <chibi@xxxxxxx> wrote: >>> >>> >>> Hello, >>> >>> On Wed, 18 Mar 2015 03:52:22 +0100 Josef Johansson wrote: >> > [snip] >>>> We though of doing a cluster with 3 servers, and any recommendation of >>>> supermicro servers would be appreciated. >>>> >>> Why 3, replication of 3? >>> With Intel SSDs and diligent (SMART/NAGIOS) wear level monitoring I'd >>> personally feel safe with a replication factor of 2. >>> >> I’ve seen recommendations of replication 2! The Intel SSDs are indeed >> endurable. This is only with Intel SSDs I assume? > > From the specifications and reviews I've seen the Samsung 845DC PRO, the > SM 843T and even more so the SV843 > (http://www.samsung.com/global/business/semiconductor/product/flash-ssd/overview > don't you love it when the same company has different, competing > products?) should do just fine when it comes to endurance and performance. > Alas I have no first hand experience with either, just the > (read-optimized) 845DC EVO. > The 845DC Pro does look really nice, comparable with s3700 with TDW even. The price is what really does it, as it’s almost a third compared with s3700.. With replication set of 3 it’s the same price as s3610 with replication set of 2. How enterprise-ish is it to run with replication set of 2 according to the Inktank-guys? Really thinking of going with 845DC Pro here actually. > >> This 1U >> http://www.supermicro.com.tw/products/system/1U/1028/SYS-1028U-TR4T_.cfm >> <http://www.supermicro.com.tw/products/system/1U/1028/SYS-1028U-TR4T_.cfm> >> is really nice, missing the SuperDOM peripherals though.. > While I certainly see use cases for SuperDOM, not all models have 2 > connectors, so no chance to RAID1 things, thus the need to _definitely_ > have to pull the server out (and re-install the OS) should it fail. Yeah, I fancy using hot swap for OS disks, and with 24 front hot swap there’s plenty room to have a couple of OS drives =) The 2U also has possibility to have an extra 2x10GbE-card totalling in 4x10GbE, which is needed. > >> so you really >> get 8 drives if you need two for OS. And the rails.. don’t get me >> started, but lately they do just snap into the racks! No screws needed. >> That’s a refresh from earlier 1U SM rails. >> > Ah, the only 1U servers I'm currently deploying from SM are older ones, so > still no snap-in rails. Everything 2U has been that way for at least 2 > years, though. ^^ It’s awesome I tell you. :) Cheers, Josef > > Christian > -- > Christian Balzer Network/Systems Engineer > chibi@xxxxxxx Global OnLine Japan/Fusion Communications > http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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