Re: raid10 is killing me, and applications that aren't willing to wait for it to respond

From	Andy Smith <andy@strugglers.net>
Newsgroups	linux.debian.user
Subject	Re: raid10 is killing me, and applications that aren't willing to wait for it to respond
Date	2023-12-13 22:40 +0100
Message-ID	<HKF7r-dnFt-27@gated-at.bofh.it> (permalink)
References	<HKzlo-dkig-37@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

Hello,

On Wed, Dec 13, 2023 at 10:26:19AM -0500, gene heskett wrote:
> I thought I was doing things right a year back when I built a raid10 for my
> /home partition. but I'm tired of fighting with it for access. Anything that
> wants to open a file on it, is subjected to a freeze of at least 30 seconds
> BEFORE the file requester is drawn on screen.

I haven't chimed in to any of the multiple times you've brought this
to the list, because it's just so bizarre. I've about 20 years'
experience of using mdadm and have never seen anything like what
you're reporting, so I just don't know what the problem could be or
how to find it.

The only times I've seen anything remotely like it have been when
there's been hardware problems with failing writes, but I know
you've been through this with the list several time sand no such low
level issues were ever uncovered.

Would it be correct to say that you only experience these IO delays
from GUI applications? Like, if you do a simple:

$ time echo "test" > ~/foo

does that complete in a normal time?

And if you did a bigger write, again from the command line?

$ dd if=/dev/zero of=/path/to/your/home/dir/zero bs=1m count=100
00+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.0783268 s, 1.3 GB/s

and with sync:

$ dd if=/dev/zero of=/path/to/your/home/dir/zero bs=1m count=100 oflag=sync
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.463356 s, 226 MB/s

But then when you try to use some GUI application to save something
to a file, the initial save file dialog takers ages to appear and
everything seems frozen?

If so then I feel like this may actually be some sort of problem
with your desktop environment, but then I've no idea how to narrow
that down.

Thanks,
Andy

-- 
https://bitfolk.com/ -- No-nonsense VPS hosting

Thread

raid10 is killing me, and applications that aren't willing to wait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-13 16:30 +0100
  Re: raid10 is killing me, and applications that aren't willing to  wait for it to respond Tom Furie <tom@furie.org.uk> - 2023-12-13 16:50 +0100
    Re: raid10 is killing me, and applications that aren't willing towait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-13 19:20 +0100
      Re: raid10 is killing me, and applications that aren't willing  towait for it to respond Tom Furie <tom@furie.org.uk> - 2023-12-13 20:00 +0100
        Re: raid10 is killing me, and applications that aren't willingtowait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-13 20:30 +0100
  Re: raid10 is killing me, and applications that aren't willing to  wait for it to respond Pocket <pocket@columbus.rr.com> - 2023-12-13 18:00 +0100
    Re: raid10 is killing me, and applications that aren't willing towait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-13 19:30 +0100
      Re: raid10 is killing me, and applications that aren't willing  towait for it to respond Nicolas George <george@nsup.org> - 2023-12-13 19:50 +0100
        Re: raid10 is killing me, and applications that aren't willing towait  for it to respond Pocket <pocket@columbus.rr.com> - 2023-12-13 20:10 +0100
      Re: raid10 is killing me, and applications that aren't willing towait  for it to respond Pocket <pocket@columbus.rr.com> - 2023-12-13 19:50 +0100
        Re: raid10 is killing me, and applications that aren't willing  towait for it to respond Dan Ritter <dsr@randomstring.org> - 2023-12-13 20:10 +0100
          Re: raid10 is killing me, and applications that aren't willing towait  for it to respond Pocket <pocket@columbus.rr.com> - 2023-12-13 20:20 +0100
          Re: raid10 is killing me, and applications that aren't willingtowait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-13 20:30 +0100
  Re: raid10 is killing me, and applications that aren't willing to  wait for it to respond "Andrew M.A. Cater" <amacater@einval.com> - 2023-12-13 19:30 +0100
    Re: raid10 is killing me, and applications that aren't willing  towait for it to respond "Andrew M.A. Cater" <amacater@einval.com> - 2023-12-13 23:00 +0100
      Re: raid10 is killing me, and applications that aren't willingtowait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-14 01:10 +0100
  Re: raid10 is killing me, and applications that aren't willing to  wait for it to respond Andy Smith <andy@strugglers.net> - 2023-12-13 22:40 +0100
    Re: raid10 is killing me, and applications that aren't willing to  wait for it to respond Andy Smith <andy@strugglers.net> - 2023-12-14 00:10 +0100
    Re: raid10 is killing me, and applications that aren't willing towait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-14 00:40 +0100
      Re: raid10 is killing me, and applications that aren't willing towait  for it to respond David Christensen <dpchrist@holgerdanske.com> - 2023-12-14 04:20 +0100
  Re: raid10 is killing me, and applications that aren't willing to  wait for it to respond <tomas@tuxteam.de> - 2023-12-14 06:50 +0100
    Re: raid10 is killing me, and applications that aren't willing to  wait for it to respond Nicolas George <george@nsup.org> - 2023-12-14 10:20 +0100
      Re: raid10 is killing me, and applications that aren't willing to  wait for it to respond <tomas@tuxteam.de> - 2023-12-14 10:40 +0100
      Re: raid10 is killing me, and applications that aren't willing towait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-14 13:10 +0100
    Re: raid10 is killing me, and applications that aren't willing towait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-14 12:00 +0100
      Re: raid10 is killing me, and applications that aren't willing towait for it to respond Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-12-14 22:40 +0100
        Re: raid10 is killing me, and applications that aren't willing towait  for it to respond gene heskett <gheskett@shentel.net> - 2023-12-15 03:40 +0100
          Re: raid10 is killing me, and applications that aren't willing towait  for it to respond David Christensen <dpchrist@holgerdanske.com> - 2023-12-15 09:10 +0100
            Re: raid10 is killing me, and applications that aren't willing  towait for it to respond Andy Smith <andy@strugglers.net> - 2023-12-15 13:30 +0100
              Re: raid10 is killing me, and applications that aren't willing towait for it to respond Stefan Monnier <monnier@iro.umontreal.ca> - 2023-12-15 16:00 +0100
            Re: raid10 is killing me, and applications that aren't willing  towaitfor it to respond gene heskett <gheskett@shentel.net> - 2023-12-16 03:30 +0100
              Re: raid10 is killing me, and applications that aren't willing  towaitfor it to respond David Christensen <dpchrist@holgerdanske.com> - 2023-12-16 05:00 +0100
                Re: raid10 is killing me, and applications that aren't  willingtowaitfor it to respond gene heskett <gheskett@shentel.net> - 2023-12-16 16:10 +0100
                Re: raid10 is killing me, and applications that aren't  willingtowaitfor it to respond David Christensen <dpchrist@holgerdanske.com> - 2023-12-16 21:30 +0100
              Re: raid10 is killing me, and applications that aren't willing  towaitfor it to respond David Christensen <dpchrist@holgerdanske.com> - 2023-12-16 05:10 +0100
                Re: raid10 is killing me, and applications that aren't willing  towaitfor it to respond Matt <matt@jmgresham.xyz> - 2023-12-16 05:20 +0100
                Re: raid10 is killing me, and applications that aren't willing  towaitfor it to respond Greg Wooledge <greg@wooledge.org> - 2023-12-16 05:30 +0100
                Re: raid10 is killing me, and applications that aren't willing  towaitfor it to respond Matt <matt@jmgresham.xyz> - 2023-12-16 05:30 +0100
                Re: raid10 is killing me, and applications that aren't willing towaitfor it to respond Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-12-16 09:30 +0100
                Re: raid10 is killing me, and applications that aren't willing  towaitfor it to respond David Christensen <dpchrist@holgerdanske.com> - 2023-12-16 20:20 +0100
          Re: raid10 is killing me, and applications that aren't willing towait for it to respond Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-12-16 09:50 +0100

csiph-web