Date: Tue, 20 Oct 2015 18:59:50 -0700 From: Jason Matthews <jason@broken.net> To: zfs@lists.illumos.org, "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>, "developer@lists.illumos.org" <developer@lists.illumos.org>, "zfs-devel@freebsd.org" <zfs-devel@freebsd.org> Subject: Re: [zfs] RE: granularity of performance penalty from resilvering Message-ID: <5626F196.5080606@broken.net> In-Reply-To: <A5A6EA4AE9DCC44F8E7FCB4D6317B1D202B43A690ED1@SH-MAIL.ISSI.COM> References: <CAJjvXiG7-MeUvGv4r=80nPfmr2qdhTwx_NtgFw5MpQ-CjkSLbA@mail.gmail.com> <A5A6EA4AE9DCC44F8E7FCB4D6317B1D202B43A690DF9@SH-MAIL.ISSI.COM> <5626E4B3.2020904@broken.net> <A5A6EA4AE9DCC44F8E7FCB4D6317B1D202B43A690EC1@SH-MAIL.ISSI.COM> <5626EFF1.9020208@broken.net> <A5A6EA4AE9DCC44F8E7FCB4D6317B1D202B43A690ED1@SH-MAIL.ISSI.COM>
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i just sent you the tunables. turn the knobs in the other direction. j. On 10/20/2015 6:58 PM, Fred Liu wrote: > 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: owner-freebsd-fs@freebsd.org [mailto:owner-freebsd-fs@freebsd.org] >> On Behalf Of Jason Matthews >> Sent: 星期三, 十月 21, 2015 9:53 >> To: zfs@lists.illumos.org; zfs-discuss@list.zfsonlinux.org; developer; >> freebsd-fs; zfs-discuss; developer@lists.illumos.org >> 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:jason@broken.net] >>> *Sent:* 星期三, 十月21, 2015 9:05 >>> *To:* zfs@lists.illumos.org; Fred Liu; >>> zfs-discuss@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-discuss@list.zfsonlinux.org >>> <mailto: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/?&; >> f5b912c9> >>> Your Subscription [Powered by Listbox] <http://www.listbox.com>; >>> >> _______________________________________________ >> freebsd-fs@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-fs >> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > > ------------------------------------------- > illumos-zfs > Archives: https://www.listbox.com/member/archive/182191/=now > RSS Feed: https://www.listbox.com/member/archive/rss/182191/22567878-8480fd5f > Modify Your Subscription: https://www.listbox.com/member/?member_id=22567878&id_secret=22567878-f5b912c9 > Powered by Listbox: http://www.listbox.com
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