Re: [ceph-users] Cores/Memory/GHz recommendation for SSD based OSD servers

www8.hp.com/h20195/v2/GetDocument.aspx?docname=c04128155 > ? > > (60 drives ?) > > I think for a full ssd node, it'll be impossible to reach max performance, > you'll be cpu bound. > > > I think a small node with 6-8 ssd osd for 20cores should be ok. > > > --

Re: [ceph-users] Cores/Memory/GHz recommendation for SSD based OSD servers

Thanks for the tips. Could anyone share their experience building a SSD pool or a SSD cache tier with HP SL4540 server? rgds, Sreenath On 4/2/15, Christian Balzer wrote: > > Hello, > > On Wed, 1 Apr 2015 18:40:10 +0530 Sreenath BH wrote: > >> Hi all, >> >> we

[ceph-users] Cores/Memory/GHz recommendation for SSD based OSD servers

Hi all, we are considering building all SSD OSD servers for RBD pool. Couple of questions: Does Ceph have any recommendation for number of cores/memory/ghz per SSD drive, similar to what is usually followed for hard drives(1 core/1 GB Ram/1Ghz speed)? thanks, Sreenath __

[ceph-users] (no subject)

Thanks for the information. -Sreenath - Date: Wed, 25 Mar 2015 04:11:11 +0100 From: Francois Lafont To: ceph-users Subject: Re: [ceph-users] PG calculator queries Message-ID: <5512274f.1000...@free.fr> Content-Type: text/plain; charset=utf-8 Hi, Sreenath BH

[ceph-users] PG calculator queries

Hi, consider following values for a pool: Size = 3 OSDs = 400 %Data = 100 Target PGs per OSD = 200 (This is default) The PG calculator generates number of PGs for this pool as : 32768. Questions: 1. The Ceph documentation recommends around 100 PGs/OSD, whereas the calculator takes 200 as defau

[ceph-users] Ceiling on number of PGs in a OSD

Hi, Is there a celing on the number for number of placement groups in a OSD beyond which steady state and/or recovery performance will start to suffer? Example: I need to create a pool with 750 osds (25 OSD per server, 50 servers). The PG calculator gives me 65536 placement groups with 300 PGs pe

Re: [ceph-users] Mapping users to different rgw pools

of is the Federation guide ( > http://ceph.com/docs/giant/radosgw/federated-config/), but it only briefly > mentions placement targets. > > > > On Thu, Mar 12, 2015 at 11:48 PM, Sreenath BH wrote: > >> Hi all, >> >> Can one Radow gateway support more than o

[ceph-users] Mapping users to different rgw pools

Hi all, Can one Radow gateway support more than one pool for storing objects? And as a follow-up question, is there a way to map different users to separate rgw pools so that their obejcts get stored in different pools? thanks, Sreenath ___ ceph-users

[ceph-users] Does ceph zero out RBD volumes when deleted?

When a RBD volume is deleted, does Ceph fill used 4 MB chunks with zeros? thanks, Sreenath ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

Re: [ceph-users] private network - VLAN vs separate switch

Thanks for all the help. We will follow the more careful approach! -Sreenath On 11/26/14, Kyle Bader wrote: >> Thanks for all the help. Can the moving over from VLAN to separate >> switches be done on a live cluster? Or does there need to be a down >> time? > > You can do it on a life cluster. T

Re: [ceph-users] private network - VLAN vs separate switch

Thanks for all the help. Can the moving over from VLAN to separate switches be done on a live cluster? Or does there need to be a down time? -Sreenath On 11/26/14, Kyle Bader wrote: >> For a large network (say 100 servers and 2500 disks), are there any >> strong advantages to using separate swit

[ceph-users] private network - VLAN vs separate switch

Hi For a large network (say 100 servers and 2500 disks), are there any strong advantages to using separate switch and physical network instead of VLAN? Also, how difficult it would be to switch from a VLAN to using separate switches later? -Sreenath ___