This feature is really needed. Even in some low-end RAID controllers, the rebuilding penalty is tunable more than the high-end enterprise storage....
> -----Original Message----- > From: [email protected] [mailto:[email protected]] > On Behalf Of Jason Matthews > Sent: 星期三, 十月 21, 2015 9:53 > To: [email protected]; [email protected]; developer; > freebsd-fs; zfs-discuss; [email protected] > Subject: Re: [zfs] RE: granularity of performance penalty from > resilvering > > > That is the only way to fly... > > j. > > On 10/20/2015 6:35 PM, 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-zfs* | Archives > > <https://www.listbox.com/member/archive/182191/=now> > > <https://www.listbox.com/member/archive/rss/182191/22567878-8480fd5f> > > | Modify > > > <https://www.listbox.com/member/?member_id=22567878&id_secret=22567878- > f5b912c9> > > Your Subscription [Powered by Listbox] <http://www.listbox.com> > > > > _______________________________________________ > [email protected] mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "[email protected]" _______________________________________________ developer mailing list [email protected] http://lists.open-zfs.org/mailman/listinfo/developer
