These are availabe on FreeBSD as well via sysctls:
* vfs.zfs.resilver_delay
* vfs.zfs.scrub_delay
* vfs.zfs.top_maxinflight
* vfs.zfs.resilver_min_time_ms
Regards
Steve
On 21/10/2015 02:35, Fred Liu wrote:
Yeah. I want to go the other way. Plus, these settings are only
applicable in illumos.
Therefore I decide to give up the hybrid( ssd+sata) solution to
underpin applications which need decent RAS.
I am gonna go all-flash array.
Thanks.
Fred
*From:*Jason Matthews [mailto:[email protected]]
*Sent:* 星期三, 十月21, 2015 9:05
*To:* [email protected]; Fred Liu;
[email protected]; developer; freebsd-fs; zfs-discuss
*Subject:* Re: [zfs] RE: granularity of performance penalty from
resilvering
you could look at these tunables (not the settings themselves)...
these settings actually make resilvers have a higher priority. You
obviously would want to go the other way.
j.
|* Prioritize resilvering by setting the delay to zero|
|set zfs:zfs_resilver_delay = 0 |
* Prioritize scrubs by setting the delay to zero
set zfs:zfs_scrub_delay = 0
|* resilver for five seconds per TXG|
|set zfs:zfs_resilver_min_time_ms = 5000|
|echo zfs_resilver_delay/w0 | mdb -kw|
|echo zfs_scrub_delay/w0 |mdb -kw|
|echo zfs_top_maxinflight/w7f |mdb -kw|
|echo zfs_resilver_min_time_ms/w1388 |mdb -kw|
On 10/19/2015 11:49 PM, Fred Liu wrote:
Yes, “zpool scrub –s” can stop the resilvering.
*From:*Fred Liu
*Sent:* 星 期二, 十月20, 2015 12:15
*To:* '[email protected]
<mailto:[email protected]>'; developer; illumos-zfs;
freebsd-fs; zfs-discuss
*Subject:* granularity of performance penalty from resilvering
Sorry if is a duplicate thread.
The last suffering has been lasted for two weeks for we replaced a
6TB HDD.
There should be some IO throttle measure from ZFS software stack.
At least, we can try to stop resilvering like scrubbing
if the realization is quiet complicated.
Besides that, will nice zil/cache be relief?
Thanks.
Fred
*illumos-developer* | Archives
<https://www.listbox.com/member/archive/182179/=now>
<https://www.listbox.com/member/archive/rss/182179/23734114-fd87e47b>
| Modify
<https://www.listbox.com/member/?member_id=23734114&id_secret=23734114-6c4c32d4>
Your Subscription [Powered by Listbox] <http://www.listbox.com>
_______________________________________________
developer mailing list
[email protected]
http://lists.open-zfs.org/mailman/listinfo/developer
