Steve, Thanks! These tunables can also be found under ZOL from following path: /sys/module/zfs/parameters
Thanks. Fred From: Steven Hartland [mailto:kill...@multiplay.co.uk] Sent: 星期三, 十月 21, 2015 16:08 To: Fred Liu; Jason Matthews; z...@lists.illumos.org; zfs-disc...@list.zfsonlinux.org; developer; freebsd-fs; zfs-discuss; develo...@lists.illumos.org Subject: Re: [developer] RE: [zfs] RE: granularity of performance penalty from resilvering 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:ja...@broken.net] Sent: 星期三, 十月 21, 2015 9:05 To: z...@lists.illumos.org<mailto:z...@lists.illumos.org>; Fred Liu; zfs-disc...@list.zfsonlinux.org<mailto:zfs-disc...@list.zfsonlinux.org>; 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: 'zfs-disc...@list.zfsonlinux.org<mailto:zfs-disc...@list.zfsonlinux.org>'; 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> [http://postlink.www.listbox.com/1980811/833487e62783d55fe81f119fb93ef644/23734114/6fff5236.jpg?uri=aHR0cHM6Ly93d3cubGlzdGJveC5jb20vaW1hZ2VzL2ZlZWQtaWNvbi0xMHgxMC5qcGc] <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 [http://postlink.www.listbox.com/1980812/3379085af0f1cf7fc3708f04b4471ae2/23734114/6fff5236.png?uri=aHR0cHM6Ly93d3cubGlzdGJveC5jb20vaW1hZ2VzL2xpc3Rib3gtbG9nby1zbWFsbC5wbmc]<http://www.listbox.com>
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