5 Feb
2021
5 Feb
'21
9:06 a.m.
Hi,
My disk latency is 25ms because of the high block size
that rocksdb is
using.
should I provide a high-performance disk than I'm using for my monitor
nodes?
what are you currently using on the MON nodes? There are
recommendations out there [1] to setup MONs with SSDs:
An SSD or other sufficiently fast storage type is
highly recommended
for monitors, specifically for the /var/lib/ceph path on each
monitor node, as quorum may be unstable with high disk latencies.
Two disks in RAID 1 configuration is recommended for redundancy. It
is recommended that separate disks or at least separate disk
partitions are used for the monitor processes to protect the
monitor's available disk space from things like log file creep.
Regards,
Eugen
[1]
https://documentation.suse.com/ses/7/single-html/ses-deployment/#sysreq-mon
Zitat von Seena Fallah <seenafallah(a)gmail.com>om>:
> This is my osdmap commit diff:
> report 4231583130
> "osdmap_first_committed": 300814,
> "osdmap_last_committed": 304062,
>
My disk latency is 25ms because of the high block size
that rocksdb is
using.
should I provide a high-performance disk than I'm using for my monitor
nodes?
>
> On Thu, Feb 4, 2021 at 3:09 AM Seena Fallah <seenafallah(a)gmail.com> wrote:
>
>> Hi all,
>>
>> My monitor nodes are getting up and down because of paxos lease timeout
>> and there is a high iops (2k iops) and 500MB/s throughput on
>> /var/lib/ceph/mon/ceph.../store.db/.
>> My cluster is in a recovery state and there is a bunch of degraded pgs on
>> my cluster.
>>
>> It seems it's doing a 200k block size io on rocksdb. Is that okay?!
>> Also is there any solution to fix these downtimes for monitors?
>>
>> Thanks for your help!
>>
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