> Op 20 december 2016 om 5:19 schreef Shubhendu Tripathi <shtripat@xxxxxxxxxx>: > > > Hi Team, > > Our team is currently working on project named "tendrl" [1][2]. > Tendrl is a management platform for software defined storage system like > Ceph, Gluster etc. > > As part of tendrl we are integrating with collectd to collect > performance data and we maintain the time series data in graphite. > > I have a question at this juncture regarding pool utilization data. > As our thought process goes, we think of using output from command "ceph > df" and parse it to figure out pool utilization data and push it to > graphite using collectd. > The question here is what is/would be performance impact of running > "ceph df" command on ceph nodes. We should be running this command only > on mon nodes I feel. > Correct, that data comes from the MONs and is not that heavy. > Wanted to verify with the team here if this thought process is in right > direction and if so what ideally should be frequency of running the > command "ceph df" from collectd. > Running the command means forking a process every time and also going through the whole cephx authentication and client <> MON process. > This is just from our point of view and we are open to any other > foolproof solution (if any). The best would be to keep a open connection to a MON and run the 'df' command directly on the MONs in a loop. I wrote something like that in Python a while ago for 'ceph status': https://gist.github.com/wido/ac53ae01d661dd57f4a8 cmd = {"prefix":"status", "format":"json"} If you change that to: cmd = {"prefix":"df", "format":"json"} You ask the MON for 'df' and get back a JSON. Run that in a loop where you sleep every 1 or 5 seconds and you should have very real-time information. Wido > > Kindly guide us. > > Regards, > Shubhendu Tripathi > > [1] http://tendrl.org/ > [2] https://github.com/tendrl/ > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
