On Mon, Jun 20, 2016 at 04:02:04PM +0000, David Turner wrote: :If you want to watch what a disk is doing while you watch it, use iostat on the journal device. If you want to see it's patterns at all times of the day, use sar. Neither of these are ceph specific commands, just Linux tools that can watch your disk utilization, speeds, etc (among other things. Both tools are well documented and easy to use.
For spot testing, like watching disk I/O during stress testing iostat as mentioned above is something I use frequently. Sar is a simple way to pull historic load info from a single host, but I find it a bit combersome at even my modest scale. We use http://munin-monitoring.org/ to do visual trending of many different server statistics including disk throughput, latency, utilization etc...this is a bit old school and there are plenty of other opensource ways of gathering and dispalying performance metrics. None of this is ceph specific and I agree there's no reason it should be. -Jon :________________________________ :From: ceph-users [[email protected]] on behalf of EP Komarla [[email protected]] :Sent: Friday, June 17, 2016 5:13 PM :To: [email protected] :Subject: [ceph-users] Ceph OSD journal utilization : :Hi, : :I am looking for a way to monitor the utilization of OSD journals – by observing the utilization pattern over time, I can determine if I have over provisioned them or not. Is there a way to do this? : :When I googled on this topic, I saw one similar request about 4 years back. I am wondering if there is some traction on this topic since then. : :Thanks a lot. : :- epk : :Legal Disclaimer: :The information contained in this message may be privileged and confidential. It is intended to be read only by the individual or entity to whom it is addressed or by their designee. If the reader of this message is not the intended recipient, you are on notice that any distribution of this message, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete or destroy any copy of this message! :_______________________________________________ :ceph-users mailing list :[email protected] :http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
