[prev in list] [next in list] [prev in thread] [next in thread] 

List:       ceph-users
Subject:    [ceph-users] Re: High ceph_osd_commit_latency_ms on Toshiba MG07ACA14TE HDDs
From:       Frank Ritchie <frankaritchie () gmail ! com>
Date:       2020-06-24 17:21:37
Message-ID: CAMuVLDOzwaq__eWZbhcCXsssSi9n1JR7UG2NCkYcD5pq6CjsiQ () mail ! gmail ! com
[Download RAW message or body]

a udev rule may be easier

On Wed, Jun 24, 2020 at 1:17 PM <DHilsbos@performair.com> 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@PerformAir.com
> www.PerformAir.com
> 
> 
> 
> -----Original Message-----
> From: Frank Schilder [mailto:frans@dtu.dk]
> Sent: Wednesday, June 24, 2020 9:15 AM
> To: Marc Roos; paul.emmerich
> Cc: bknecht; ceph-users; s.priebe
> Subject: [ceph-users] 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@f1-outsourcing.eu>
> Sent: 24 June 2020 18:08:49
> To: Frank Schilder; paul.emmerich
> Cc: bknecht; ceph-users; s.priebe
> Subject: RE: [ceph-users] 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@ceph.io
> To unsubscribe send an email to ceph-users-leave@ceph.io
> _______________________________________________
> ceph-users mailing list -- ceph-users@ceph.io
> To unsubscribe send an email to ceph-users-leave@ceph.io
_______________________________________________
ceph-users mailing list -- ceph-users@ceph.io
To unsubscribe send an email to ceph-users-leave@ceph.io


[prev in list] [next in list] [prev in thread] [next in thread]