[ceph-users] SL4500 as a storage machine

Hi. First of all, nice to meet you, and thanks for the great software! I've thoroughly read the benchmarks on the SuperMicro hardware with and without SSD combinations, and wondered if there were any tests done on HP file server. According to this article: http://www.theregister.co.uk/2012/11/15

Re: [ceph-users] SL4500 as a storage machine

Hi Mark. > The SL4500 series looks like it should be a good option for large > deployments, though you may want to consider going with the 2-node > configuration with 25 drives each. The drive density is a bit lower but > you'll have a better CPU/drive ratio and can get away with much cheaper >

Re: [ceph-users] SL4500 as a storage machine

> For me,We have seem a supermicro machine,which is 2U with 2 CPU and 24 2.5 > inch sata/sas drives,together with 2 onboard 10Gb Nic. I think it's good > enough for both density and computing power. > > This configuration can also hold 12 3.5 drives? What model you use?

[ceph-users] Lazy deletion takes a lot of resources

Hi, When erasing a lot of small files (4kb - 32mb), Ceph starts to eat a lot of CPU. Any idea how to resolve it? Thanks. ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

Re: [ceph-users] Lazy deletion takes a lot of resources

On Sun, Apr 7, 2013 at 4:43 PM, Stas Oskin wrote: > Hi, > > When erasing a lot of small files (4kb - 32mb), Ceph starts to eat a lot > of CPU. > > To be more exact, the CPU loads on storage node climb up to 35%-40% (iowait slightly above it, but it might be due to slow disks

Re: [ceph-users] SL4500 as a storage machine

1) If data availability and redundancy is most important, you would go > with multiple 2U boxes to minimize cluster impacts in case of any >> downtime? >> > > My general feeling here is that it depends on the size of the cluster. For > small clusters, 2U or even 1U boxes may be ideal. For very l

Re: [ceph-users] SL4500 as a storage machine

Hi. > I mean the sl4500 can have 2 nodes with 50 drives instead of 1 node with > 60 drives. See this: > > http://h18000.www1.hp.com/**products/quickspecs/14406_div/**14406_div.HTML > > That lets you use cheaper CPUs and also

Re: [ceph-users] SL4500 as a storage machine

Hi, Like I said, it's just my instinct. For a 180TB (raw) cluster you've got > some tough choices to make. Some options might include: > > 1) high density and low cost by just stick a bunch of 3GB drives in 5 2U > nodes and make sure you don't fill the cluster past ~75% (which you > probably don