* How do i limit the bandwidth-usage while resyncing on RAID 1?
@ 2007-10-10 15:11 Rustedt, Florian
2007-10-10 15:15 ` Tomasz Chmielewski
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Rustedt, Florian @ 2007-10-10 15:11 UTC (permalink / raw)
To: linux-raid
Hello List,
while resyncing, the process takes the whole bandwidth from disk to disk.
This leads in a VERY unhappy situation, because the system on this raid is
unpractical slow now, because it has to wait for disk-io.
How can i tune this? I want somthing like "nice -n 19 dm-mirror" ;)
Kind regards, Florian
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: How do i limit the bandwidth-usage while resyncing on RAID 1?
2007-10-10 15:11 How do i limit the bandwidth-usage while resyncing on RAID 1? Rustedt, Florian
@ 2007-10-10 15:15 ` Tomasz Chmielewski
2007-10-10 19:45 ` Richard Scobie
2007-10-11 22:27 ` Neil Brown
2 siblings, 0 replies; 4+ messages in thread
From: Tomasz Chmielewski @ 2007-10-10 15:15 UTC (permalink / raw)
To: Rustedt, Florian; +Cc: linux-raid
Rustedt, Florian schrieb:
> Hello List,
>
> while resyncing, the process takes the whole bandwidth from disk to disk.
>
> This leads in a VERY unhappy situation, because the system on this raid is
> unpractical slow now, because it has to wait for disk-io.
>
> How can i tune this? I want somthing like "nice -n 19 dm-mirror" ;)
Look into sync_speed_min and sync_speed_max in /sys/block/mdX/md.
--
Tomasz Chmielewski
http://blog.wpkg.org
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: How do i limit the bandwidth-usage while resyncing on RAID 1?
2007-10-10 15:11 How do i limit the bandwidth-usage while resyncing on RAID 1? Rustedt, Florian
2007-10-10 15:15 ` Tomasz Chmielewski
@ 2007-10-10 19:45 ` Richard Scobie
2007-10-11 22:27 ` Neil Brown
2 siblings, 0 replies; 4+ messages in thread
From: Richard Scobie @ 2007-10-10 19:45 UTC (permalink / raw)
To: Linux RAID Mailing List
Rustedt, Florian wrote:
> How can i tune this? I want somthing like "nice -n 19 dm-mirror" ;)
Have a look at man rsync - the --bwlimit=KBPS option.
Regards,
Richard
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: How do i limit the bandwidth-usage while resyncing on RAID 1?
2007-10-10 15:11 How do i limit the bandwidth-usage while resyncing on RAID 1? Rustedt, Florian
2007-10-10 15:15 ` Tomasz Chmielewski
2007-10-10 19:45 ` Richard Scobie
@ 2007-10-11 22:27 ` Neil Brown
2 siblings, 0 replies; 4+ messages in thread
From: Neil Brown @ 2007-10-11 22:27 UTC (permalink / raw)
To: Rustedt, Florian; +Cc: linux-raid
On Wednesday October 10, florian.rustedt@smartnet.de wrote:
> Hello List,
>
> while resyncing, the process takes the whole bandwidth from disk to disk.
>
> This leads in a VERY unhappy situation, because the system on this raid is
> unpractical slow now, because it has to wait for disk-io.
>
> How can i tune this? I want somthing like "nice -n 19 dm-mirror" ;)
Are you using MD raid, or DM?
If DM, then it is my understanding that you cannot ratelimit.
If DM, then you already have the answer from a previous post.
NeilBrown
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-10-11 22:27 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2007-10-10 15:11 How do i limit the bandwidth-usage while resyncing on RAID 1? Rustedt, Florian
2007-10-10 15:15 ` Tomasz Chmielewski
2007-10-10 19:45 ` Richard Scobie
2007-10-11 22:27 ` Neil Brown
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