Re: OSD per disk.

[Alexandre DERUMIER <aderumier@odiso.com>]

maybe try 

[osd.0] 
host = testnode 
osd data = /data/osd0 
osd journal = /data/osd0/osd0journal 
osd journal size = 1000 

[osd.1] 
host = testnode 
osd data = /data/osd1 
osd journal = /data/osd1/osd1journal 
osd journal size = 1000 
[osd.2] 
host = testnode 
osd data = /data/osd2 
osd journal = /data/osd2/osd2journal 
osd journal size = 1000 
[osd.3] 
host = testnode 
osd data = /data/osd3 
osd journal = /data/osd3/osd3journal 
osd journal size = 1000 



you can start osd with

/etc/init.d/ceph start osd0
/etc/init.d/ceph start osd1
/etc/init.d/ceph start osd2
/etc/init.d/ceph start osd3

----- Mail original ----- 

De: "chandrashekhar" <chandubigc@gmail.com> 
À: ceph-devel@vger.kernel.org 
Envoyé: Lundi 28 Mai 2012 11:25:36 
Objet: Re: OSD per disk. 


Alexandre DERUMIER <aderumier <at> odiso.com> writes: 

> 
> Hi, just defined osds in ceph.conf, they mount each disk in correct mountpoint. 
> 
> this example : 
> 1st server : 
> /dev/sdb1 -> /data/osd0 
> /dev/sdc1 -> /data/osd1 
> /dev/sdd1 -> /data/osd2 
> .... 
> same for journal.(you can use differents disk for journal or use another 
partition on same disk) 
> 
> ceph.conf 
> [osd] 
> 
> osd data = /data/osd$id 
> osd journal = /data/osd$id/journal 
> osd journal size = 512 
> 
> [osd.0] 
> host = ceph-node-1 
> 
> [osd.1] 
> host = ceph-node-1 
> 
> [osd.2] 
> host = ceph-node-1 
> 
> [osd.3] 
> host = ceph-node-2 
> 
> [osd.4] 
> host = ceph-node-2 
> 
> ----- Mail original ----- 
> 
> De: "chandrashekhar" <chandubigc <at> gmail.com> 
> À: ceph-devel <at> vger.kernel.org 
> Envoyé: Lundi 28 Mai 2012 08:19:17 
> Objet: OSD per disk. 
> 
> Hi, 
> 
> I want to setup a ceph cluster with 4 osds ( one OSD per disk), 2 mons, 1 
> mds. Please help me to configure this. 
> 
> I have a machine with following hardware: 
> 
> 4 hard disks ( each 500GB). 
> 
> /dev/sda - 500G ( OS ) 
> /dev/sdb - 500G 
> /dev/sdc - 500G 
> /dev/sdd - 500G 
> 
> OS: ubuntu 12.O4 server ( 64 bit ) 
> 
> Thanks, 
> Chandra. 
> 

Thanks Alexandre, I created four directories in /data (osd0,osd1,osd2,osd3) 
and mounted as below: 

/dev/sdb1 -> /data/osd1 
/dev/sdc1 -> /data/osd2 
/dev/sdd1 -> /data/osd3 


But when I start ceph its starting mons and md daemons but not osds. Please help 
me to get this working. 

>ceph -w 
2012-05-28 14:43:23.756895 pg v2: 792 pgs: 792 creating; 0 bytes data, 0 KB 
used, 0 KB / 0 KB avail 
2012-05-28 14:43:23.762160 mds e1: 0/0/1 up 
2012-05-28 14:43:23.762296 osd e1: 0 osds: 0 up, 0 in 
2012-05-28 14:43:23.762586 log 2012-05-28 14:24:15.391671 mon.0 
192.168.7.10:6789/0 4 : [INF] mon.a@0 won leader election with quorum 0,1 
2012-05-28 14:43:23.762741 mon e1: 2 mons at 
{a=192.168.7.10:6789/0,b=192.168.7.10:6790/0} 




Here is my ceph.conf: 
------------------------------------------------- 
[global] 
auth supported = cephx 
keyring = /etc/ceph/keyring.admin 

[mon] 
mon data = /data/mon.$id 

[mds] 

[osd] 
osd data = /data/osd$id 
osd journal = /data/osd$id/osd.$id.journal 
osd journal size = 1000 



[mon.a] 
host = testnode 
mon addr = 192.168.7.10:6789 
[mon.b] 
host = testnode 
mon addr = 192.168.7.10:6790 

[osd.0] 
host = testnode 

[osd.1] 
host = testnode 

[osd.2] 
host = testnode 

[osd.3] 
host = testnode 
[mds.a] 
host = testnode 




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-- 

-- 




	Alexandre D erumier 
Ingénieur Système 
Fixe : 03 20 68 88 90 
Fax : 03 20 68 90 81 
45 Bvd du Général Leclerc 59100 Roubaix - France 
12 rue Marivaux 75002 Paris - France 
	
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