Re: [ceph-users] RBD performance test (write) problem

Hi Mark, Sorry, reply too late, because I didn't receive this mail so missed this message in the several days... http://www.mail-archive.com/ceph-users@lists.ceph.com/msg00624.html Your advice are very very helpful to me !!! thanks :) I have done the following test and have some questions 1)

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

On 04/14/2013 08:38 AM, Stas Oskin wrote: 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

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

On 04/14/2013 09:25 AM, Stas Oskin wrote: 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

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

[ceph-users] pg_num (pgp_num) for default pools

Hello! How is pg_num (pgp_num) for default pools (data, metadata and rbd) is calculated? According to following: http://ceph.com/docs/master/rados/operations/placement-groups If my cluster has 30 OSDs and 3 replica per Object (osd pool default size = 3), I should be creating new pools with pg_nu