a udev rule may be easier On Wed, Jun 24, 2020 at 1:17 PM <DHilsbos@xxxxxxxxxxxxxx> wrote: > > All; > > This conversation has been fascinating. > > I'm throwing my hat in the ring, though I know almost nothing about systemd... > > Completely non-portable, but... > Couldn't you write a script to issue the necessary commands to the desired drives, then create a system unit that calls it before OSD initialization? > > Thank you, > > Dominic L. Hilsbos, MBA > Director - Information Technology > Perform Air International, Inc. > DHilsbos@xxxxxxxxxxxxxx > www.PerformAir.com > > > > -----Original Message----- > From: Frank Schilder [mailto:frans@xxxxxx] > Sent: Wednesday, June 24, 2020 9:15 AM > To: Marc Roos; paul.emmerich > Cc: bknecht; ceph-users; s.priebe > Subject: Re: High ceph_osd_commit_latency_ms on Toshiba MG07ACA14TE HDDs > > > I can remember reading this before. I was hoping you maybe had some > > setup with systemd scripts or maybe udev. > > Yeah, doing this on boot up would be ideal. I was looking really hard into tuned and other services that claimed can do it, but required plugins or other stuff did/does not exist and documentation is close to non-existent. > > After spending a couple of days I gave up and went with the simple script-command version. > > If you come across something that allows easy configuration of this at boot-time, please let me know. > > Best regards, > ================= > Frank Schilder > AIT Risø Campus > Bygning 109, rum S14 > > ________________________________________ > From: Marc Roos <M.Roos@xxxxxxxxxxxxxxxxx> > Sent: 24 June 2020 18:08:49 > To: Frank Schilder; paul.emmerich > Cc: bknecht; ceph-users; s.priebe > Subject: RE: Re: High ceph_osd_commit_latency_ms on Toshiba MG07ACA14TE HDDs > > > Sorry for the spam, but I need to add this disclaimer: > > > Although it is documented as safe to disable volatile write cache on a > disk in use, I would > > probably not do it. The required cache flush might be erroneous in the > firmware. > > I can remember reading this before. I was hoping you maybe had some > setup with systemd scripts or maybe udev. > > > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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