Date: Tue, 20 Oct 2015 18:04:51 -0700 From: Jason Matthews <jason@broken.net> To: zfs@lists.illumos.org, Fred Liu <Fred_Liu@issi.com>, "zfs-discuss@list.zfsonlinux.org" <zfs-discuss@list.zfsonlinux.org>, developer <developer@open-zfs.org>, freebsd-fs <freebsd-fs@freebsd.org>, zfs-discuss <zfs-discuss@zfsonlinux.org> Subject: Re: [zfs] RE: granularity of performance penalty from resilvering Message-ID: <5626E4B3.2020904@broken.net> In-Reply-To: <A5A6EA4AE9DCC44F8E7FCB4D6317B1D202B43A690DF9@SH-MAIL.ISSI.COM> References: <CAJjvXiG7-MeUvGv4r=80nPfmr2qdhTwx_NtgFw5MpQ-CjkSLbA@mail.gmail.com> <A5A6EA4AE9DCC44F8E7FCB4D6317B1D202B43A690DF9@SH-MAIL.ISSI.COM>
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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-discuss@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-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>; >
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