On 08/19/2015 10:58 AM, Nick Fisk wrote:
-----Original Message-----
From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of
Jacek Jarosiewicz
Sent: 19 August 2015 09:29
To: ceph-us...@ceph.com
Subject: [ceph-users] requests are blocked - problem
I would suggest running the fio tests again, just to make sure that there isn't
a problem with your newer config, but I suspect you will see equally bad
performance with the fio tests now that the cache tier has begun to be more
populated.
Ok, I did the tests and You're right - the full cache was the problem.
After flushing cache and running fio results are again good (fast).
Is there a way to tune the cache parameters so that the whole cluster
doesn't slow down that much and doesn't block requests?
We use defaults for the cache pool from the documentation:
hit_set_period 3600
cache_min_flush_age 600
cache_min_evict_age 1800
J
--
Jacek Jarosiewicz
Administrator Systemów Informatycznych
----------------------------------------------------------------------------------------
SUPERMEDIA Sp. z o.o. z siedzibą w Warszawie
ul. Senatorska 13/15, 00-075 Warszawa
Sąd Rejonowy dla m.st.Warszawy, XII Wydział Gospodarczy Krajowego
Rejestru Sądowego,
nr KRS 0000029537; kapitał zakładowy 42.756.000 zł
NIP: 957-05-49-503
Adres korespondencyjny: ul. Jubilerska 10, 04-190 Warszawa
----------------------------------------------------------------------------------------
SUPERMEDIA -> http://www.supermedia.pl
dostep do internetu - hosting - kolokacja - lacza - telefonia
_______________________________________________
ceph-users mailing list
ceph-users@lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
