Hi Gregory,
The latency is under my ceph test environment. It has only 1 host
with 16 2T SATA disks(16 OSDs) and 10Gb/s NIC，
journal and data are on the same disk which fs type is ext4.
my cluster config is like this. is it normal under this
configuration ? or how can i improve performance ?
Thanks.
[root@storage1 ~]# ceph -s
cluster 3429fd17-4a92-4d3b-a7fa-04adedb0da82
health HEALTH_OK
monmap e1: 1 mons at {storage1=193.168.1.100:6789/0}, election epoch
1, quorum 0 storage1
osdmap e373: 16 osds: 16 up, 16 in
pgmap v3515: 1024 pgs, 1 pools, 15635 MB data, 3946 objects
87220 MB used, 27764 GB / 29340 GB avail
1024 active+clean
[root@storage1 ~]# ceph osd tree
# id weight type name up/down reweight
-1 16 root default
-2 16 host storage1
0 1 osd.0 up 1
1 1 osd.1 up 1
2 1 osd.2 up 1
3 1 osd.3 up 1
4 1 osd.4 up 1
5 1 osd.5 up 1
6 1 osd.6 up 1
7 1 osd.7 up 1
8 1 osd.8 up 1
9 1 osd.9 up 1
10 1 osd.10 up 1
11 1 osd.11 up 1
12 1 osd.12 up 1
13 1 osd.13 up 1
14 1 osd.14 up 1
15 1 osd.15 up 1
[root@storage1 ~]# cat /etc/ceph/ceph.conf
[global]
fsid = 3429fd17-4a92-4d3b-a7fa-04adedb0da82
public network = 193.168.1.0/24
auth cluster required = cephx
auth service required = cephx
auth client required = cephx
filestore xattr use omap = true
[mon]
debug paxos = 0/5
[mon.storage1]
host = storage1
mon addr = 193.168.1.100:6789
[osd.0]
host = storage1
[osd.1]
host = storage1
[osd.2]
host = storage1
[osd.3]
host = storage1
[osd.4]
host = storage1
[osd.5]
host = storage1
[osd.6]
host = storage1
[osd.7]
host = storage1
[osd.8]
host = storage1
[osd.9]
host = storage1
[osd.10]
host = storage1
[osd.11]
host = storage1
[osd.12]
host = storage1
[osd.13]
host = storage1
[osd.14]
host = storage1
[osd.15]
host = storage1
Re: [ceph-users] why my "fs_commit_latency" is so high ? is it normal ?
Gregory Farnum
收件人:
duan.xufeng
2014/03/17 13:08
抄送:
"ceph-users@lists.ceph.com"
That seems a little high; how do you have your system configured? That
latency is how long it takes for the hard drive to durably write out
something to the journal.
-Greg
Software Engineer #42 @ http://inktank.com | http://ceph.com
On Sun, Mar 16, 2014 at 9:59 PM, <duan.xuf...@zte.com.cn> wrote:
>
> [root@storage1 ~]# ceph osd perf
> osdid fs_commit_latency(ms) fs_apply_latency(ms)
> 0 149 52
> 1 201 61
> 2 176 166
> 3 240 57
> 4 219 49
> 5 167 56
> 6 201 54
> 7 175 188
> 8 192 124
> 9 367 193
> 10 343 160
> 11 183 110
> 12 158 143
> 13 267 147
> 14 150 155
> 15 159 54
>
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