Dear Experts
Can someone please help me , why my cluster is not able write data.
See the below output cur MB/S is 0 and Avg MB/s is decreasing.
Ceph Hammer 0.94.2
CentOS 6 (3.10.69-1)
The Ceph status says OPS are blocked , i have tried checking , what all i know
- System resources ( CPU , net, disk , memory ) -- All normal
- 10G network for public and cluster network -- no saturation
- Add disks are physically healthy
- No messages in /var/log/messages OR dmesg
- Tried restarting OSD which are blocking operation , but no luck
- Tried writing through RBD and Rados bench , both are giving same problemm
Please help me to fix this problem.
# rados bench -p rbd 60 write
Maintaining 16 concurrent writes of 4194304 bytes for up to 60 seconds or 0 objects
Object prefix: benchmark_data_stor1_1791844
sec Cur ops started finished avg MB/s cur MB/s last lat avg lat
0 0 0 0 0 0 - 0
1 16 125 109 435.873 436 0.022076 0.0697864
2 16 139 123 245.948 56 0.246578 0.0674407
3 16 139 123 163.969 0 - 0.0674407
4 16 139 123 122.978 0 - 0.0674407
5 16 139 123 98.383 0 - 0.0674407
6 16 139 123 81.9865 0 - 0.0674407
7 16 139 123 70.2747 0 - 0.0674407
8 16 139 123 61.4903 0 - 0.0674407
9 16 139 123 54.6582 0 - 0.0674407
10 16 139 123 49.1924 0 - 0.0674407
11 16 139 123 44.7201 0 - 0.0674407
12 16 139 123 40.9934 0 - 0.0674407
13 16 139 123 37.8401 0 - 0.0674407
14 16 139 123 35.1373 0 - 0.0674407
15 16 139 123 32.7949 0 - 0.0674407
16 16 139 123 30.7451 0 - 0.0674407
17 16 139 123 28.9364 0 - 0.0674407
18 16 139 123 27.3289 0 - 0.0674407
19 16 139 123 25.8905 0 - 0.0674407
2015-09-07 15:54:52.694071min lat: 0.022076 max lat: 0.46117 avg lat: 0.0674407
sec Cur ops started finished avg MB/s cur MB/s last lat avg lat
20 16 139 123 24.596 0 - 0.0674407
21 16 139 123 23.4247 0 - 0.0674407
22 16 139 123 22.36 0 - 0.0674407
23 16 139 123 21.3878 0 - 0.0674407
24 16 139 123 20.4966 0 - 0.0674407
25 16 139 123 19.6768 0 - 0.0674407
26 16 139 123 18.92 0 - 0.0674407
27 16 139 123 18.2192 0 - 0.0674407
28 16 139 123 17.5686 0 - 0.0674407
29 16 139 123 16.9628 0 - 0.0674407
30 16 139 123 16.3973 0 - 0.0674407
31 16 139 123 15.8684 0 - 0.0674407
32 16 139 123 15.3725 0 - 0.0674407
33 16 139 123 14.9067 0 - 0.0674407
34 16 139 123 14.4683 0 - 0.0674407
35 16 139 123 14.0549 0 - 0.0674407
36 16 139 123 13.6645 0 - 0.0674407
37 16 139 123 13.2952 0 - 0.0674407
38 16 139 123 12.9453 0 - 0.0674407
39 16 139 123 12.6134 0 - 0.0674407
2015-09-07 15:55:12.697124min lat: 0.022076 max lat: 0.46117 avg lat: 0.0674407
sec Cur ops started finished avg MB/s cur MB/s last lat avg lat
40 16 139 123 12.2981 0 - 0.0674407
41 16 139 123 11.9981 0 - 0.0674407
cluster 86edf8b8-b353-49f1-ab0a-a4827a9ea5e8
health HEALTH_WARN
1 requests are blocked > 32 sec
monmap e3: 3 mons at {stor0111=10.100.1.111:6789/0,stor0113=10.100.1.113:6789/0,stor011
election epoch 32, quorum 0,1,2 stor0111,stor0113,stor0115
osdmap e19536: 50 osds: 50 up, 50 in
pgmap v928610: 2752 pgs, 9 pools, 30476 GB data, 4183 kobjects
91513 GB used, 47642 GB / 135 TB avail
2752 active+clean
Tried using RBD
# dd if=/dev/zero of=file1 bs=4K count=10000 oflag=direct
10000+0 records in
10000+0 records out
40960000 bytes (41 MB) copied, 24.5529 s, 1.7 MB/s
# dd if=/dev/zero of=file1 bs=1M count=100 oflag=direct
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 1.05602 s, 9.3 MB/s
# dd if=/dev/zero of=file1 bs=1G count=1 oflag=direct
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB) copied, 293.551 s, 3.7 MB/s
]#
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