We've upgraded ceph to 0.94.4 and kernel to 3.16.0-51-generic
but the problem still persists. Lately we see these crashes on a daily
basis. I'm leaning toward the conclusion that this is a software problem
- this hardware ran stable before and we're seeing all four nodes crash
randomly with
Hello,
There are of course a number of threads in the ML archives about things
like this.
On Sat, 24 Oct 2015 17:48:35 +0200 Mike Miller wrote:
> Hi,
>
> as I am planning to set up a ceph cluster with 6 OSD nodes with 10
> harddisks in each node, could you please give me some advice about
>
Hi,
New information, i think the poor performance is due to too many threads of
qume-system-x86 process.
For normal case, it just use about 200 threads.
For abnormal case, it will use about 400 threads or 700 threads, and the
performance is:
200 threads > 400 threads > 700 threads
Now, i
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I have a 0.94.4 cluster that when I repair/deep-scrub a PG, it comes
back clean, but as soon as I restart any OSD that hosts it, it goes
back to inconsistent. If I deep-scrub that PG it clears up.
I determined that the bad copy was not on the
Quorum can be achieved with one monitor node (for testing purposes this would
be OK, but of course it is a single point of failure) however the default for
the OSD nodes is three way replication (can be changed) but easier to set up
three OSD nodes to start with and one monitor node. For your
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I set debug_osd = 20/20 and restarted the primary osd. The logs are at
http://162.144.87.113/files/ceph-osd.110.log.xz .
The PG in question is 9.e3 and it is one of 15 that have this same
behavior. The cluster is currently idle.
-
Hi all,
When an osd is started, I will get a lot of slow requests from the
corresponding osd log, as follows:
2015-10-26 03:42:51.593961 osd.4 [WRN] slow request 3.967808 seconds
old, received at 2015-10-26 03:42:47.625968:
osd_repop(client.2682003.0:2686048 43.fcf
Hi experts,
When I test io performance of rbd volume in pure ssd pool with fio in
kvm vm, the iops decreased from 15k to 5k, while nums of qemu
threads on host increased from about 200 to about 700, cpu usage
of qemu process on host increased from 600% to 1400%.
My testing scene is as
Hello,
On Sun, 25 Oct 2015 16:17:02 +0100 Hermann Himmelbauer wrote:
> Hi,
> In a little project of mine I plan to start ceph storage with a small
> setup and to be able to scale it up later. Perhaps someone can give me
> any advice if the following (two nodes with OSDs, third node with
>
Hi all,
When an osd is started, I will get a lot of slow requests from the
corresponding osd log, as follows:
2015-10-26 03:42:51.593961 osd.4 [WRN] slow request 3.967808 seconds
old, received at 2015-10-26 03:42:47.625968:
osd_repop(client.2682003.0:2686048 43.fcf
Hi,
we have a Ceph cluster with:
- 12 OSDs on 6 physical nodes, 64 GB RAM
- each OSD has a 6 TB spinning disk and a 10GB journal in ram (tmpfs) [1]
- 3 redundant copies
- 25% space usage so far
- ceph 0.94.2.
- store data via radosgw, using sharded bucket indexes (64 shards).
- 500 PGs per node
Hi,
In a little project of mine I plan to start ceph storage with a small
setup and to be able to scale it up later. Perhaps someone can give me
any advice if the following (two nodes with OSDs, third node with
Monitor only):
- 2 Nodes (enough RAM + CPU), 6*3TB Harddisk for OSDs -> 9TB usable
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