Hello MJ,
Perhaps your PGs are a unbalanced?
Ceph osd df tree
Greetz
Mehmet
Am 10. Februar 2020 14:58:25 MEZ schrieb lists :
>Hi,
>
>We would like to replace the current seagate ST4000NM0034 HDDs in our
>ceph cluster with SSDs, and before doing that, we would like to
>checkout
>the typical u
try from admin node
ceph osd df
ceph osd status
thanks Joe
>>> 2/10/2020 10:44 AM >>>
Hello MJ,
Perhaps your PGs are a unbalanced?
Ceph osd df tree
Greetz
Mehmet
Am 10. Februar 2020 14:58:25 MEZ schrieb lists :
>Hi,
>
>We would like to replace the current seagate ST4000NM0034 HDDs in our
Hi Joe and Mehmet!
Thanks for your responses!
The requested outputs at the end of the message.
But to make my question more clear:
What we are actually after, is not about CURRENT usage of our OSDs, but
stats on total GBs written in the cluster, per OSD, and read/write ratio.
With those num
>>>And it seems smartctl on our seagate ST4000NM0034 drives do not give us
data on total bytes written or read
If it's a SAS device, it's not always obvious where to find this information.
You can use Seagate's openseachest toolset.
For any (SAS/SATA, HDD/SSD) device, the --deviceInfo will give
Hi Muhammad,
Yes, that tool helps! Thank you for pointing it out!
With a combination of openSeaChest_Info and smartctl I was able to
extract the following stats of our cluster, and the numbers are very
surprising to me. I hope someone here can explain the what we see below:
node1 AnnualWr
On 2/12/20 11:23 AM, mj wrote:
Better layout for the disks usage stats:
https://pastebin.com/8V5VDXNt
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Hi,
I would like to understand why the OSD HDDs on node2 of my three
identical ceph hosts claim to have processed 10 times more reads/writes
than the other two nodes.
OSD weights are all the similar, disk usage in space also, same disk
sizes, same reported disk usage hours etc, etc. All data