Date: Thu, 22 Sep 2016 13:01:02 +0100 From: Steven Hartland <killing@multiplay.co.uk> To: freebsd-stable@freebsd.org Subject: Re: zfs/raidz and creation pause/blocking Message-ID: <d5026871-81b7-f7ce-4a07-a40b225d7004@multiplay.co.uk> In-Reply-To: <57E3C68C.8060200@norma.perm.ru> References: <57E3C68C.8060200@norma.perm.ru>
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Almost certainly its TRIMing the drives try setting the sysctl vfs.zfs.vdev.trim_on_init=0 On 22/09/2016 12:54, Eugene M. Zheganin wrote: > Hi. > > Recently I spent a lot of time setting up various zfs installations, and > I got a question. > Often when creating a raidz on disks considerably big (>~ 1T) I'm seeing > a weird stuff: "zpool create" blocks, and waits for several minutes. In > the same time system is fully responsive and I can see in gstat that the > kernel starts to tamper all the pool candidates sequentially at 100% > busy with iops around zero (in the example below, taken from a live > system, it's doing something with da11): > > (zpool create gamestop raidz da5 da7 da8 da9 da10 da11) > > dT: 1.064s w: 1.000s > L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name > 0 0 0 0 0.0 0 0 0.0 0.0| da0 > 0 0 0 0 0.0 0 0 0.0 0.0| da1 > 0 0 0 0 0.0 0 0 0.0 0.0| da2 > 0 0 0 0 0.0 0 0 0.0 0.0| da3 > 0 0 0 0 0.0 0 0 0.0 0.0| da4 > 0 0 0 0 0.0 0 0 0.0 0.0| da5 > 0 0 0 0 0.0 0 0 0.0 0.0| da6 > 0 0 0 0 0.0 0 0 0.0 0.0| da7 > 0 0 0 0 0.0 0 0 0.0 0.0| da8 > 0 0 0 0 0.0 0 0 0.0 0.0| da9 > 0 0 0 0 0.0 0 0 0.0 0.0| da10 > 150 3 0 0 0.0 0 0 0.0 112.6| da11 > 0 0 0 0 0.0 0 0 0.0 0.0| da0p1 > 0 0 0 0 0.0 0 0 0.0 0.0| da0p2 > 0 0 0 0 0.0 0 0 0.0 0.0| da0p3 > 0 0 0 0 0.0 0 0 0.0 0.0| da1p1 > 0 0 0 0 0.0 0 0 0.0 0.0| da1p2 > 0 0 0 0 0.0 0 0 0.0 0.0| da1p3 > 0 0 0 0 0.0 0 0 0.0 0.0| da0p4 > 0 0 0 0 0.0 0 0 0.0 0.0| gpt/boot0 > 0 0 0 0 0.0 0 0 0.0 0.0| > gptid/22659641-7ee6-11e6-9b56-0cc47aa41194 > 0 0 0 0 0.0 0 0 0.0 0.0| gpt/zroot0 > 0 0 0 0 0.0 0 0 0.0 0.0| gpt/esx0 > 0 0 0 0 0.0 0 0 0.0 0.0| gpt/boot1 > 0 0 0 0 0.0 0 0 0.0 0.0| > gptid/23c1fbec-7ee6-11e6-9b56-0cc47aa41194 > 0 0 0 0 0.0 0 0 0.0 0.0| gpt/zroot1 > 0 0 0 0 0.0 0 0 0.0 0.0| mirror/mirror > 0 0 0 0 0.0 0 0 0.0 0.0| da1p4 > 0 0 0 0 0.0 0 0 0.0 0.0| gpt/esx1 > > The most funny thing is that da5,7-11 are SSD, with a capability of like > 30K iops at their least. > So I wonder what is happening during this and why does it take that > long. Because usually pools are creating very fast. > > Thanks. > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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