Hi experts,
we have upgraded our cluster to Luminous successfully, no big issues
so far. We are also testing cache tier with only 2 SSDs (we know it's
not recommended), and there's one issue to be resolved:
Evertime we have to restart the cache OSDs we get slow requests with
impacts on our client VMs. We never restart both SSDs at the same
time, of course, so we are wondering why the slow requests? What
exactly is happening with a replication size of 2? We assumed that if
one SSD is restarted the data is still available on the other disc, we
didn't expect any problems. But this occurs everytime we have to
restart them. Can anyone explain what is going on there? We could use
your expertise on this :-)
Best regards,
Eugen
--
Eugen Block voice : +49-40-559 51 75
NDE Netzdesign und -entwicklung AG fax : +49-40-559 51 77
Postfach 61 03 15
D-22423 Hamburg e-mail : [email protected]
Vorsitzende des Aufsichtsrates: Angelika Mozdzen
Sitz und Registergericht: Hamburg, HRB 90934
Vorstand: Jens-U. Mozdzen
USt-IdNr. DE 814 013 983
_______________________________________________
ceph-users mailing list
[email protected]
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
