Date: Mon, 2 Oct 2017 21:16:10 +0200 From: Ben RUBSON <ben.rubson@gmail.com> To: Freebsd fs <freebsd-fs@freebsd.org> Subject: Re: ZFS stalled after some mirror disks were lost Message-ID: <A67E8610-79E3-42CE-8197-DCEEB1753DC2@gmail.com> In-Reply-To: <CA%2BtpaK2=du8Ghrz9N4sfBk2T4tAC9NEdwOoHV3CQz5DOKcMogw@mail.gmail.com> References: <4A0E9EB8-57EA-4E76-9D7E-3E344B2037D2@gmail.com> <CA%2BtpaK2=du8Ghrz9N4sfBk2T4tAC9NEdwOoHV3CQz5DOKcMogw@mail.gmail.com>
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> On 02 Oct 2017, at 20:44, Adam Vande More <amvandemore@gmail.com> = wrote: >=20 >> On Mon, Oct 2, 2017 at 1:12 PM, Ben RUBSON <ben.rubson@gmail.com> = wrote: >> Hi, >>=20 >> On a FreeBSD 11 server, the following online/healthy zpool : >>=20 >> home >> mirror-0 >> label/local1 >> label/local2 >> label/iscsi1 >> label/iscsi2 >> mirror-1 >> label/local3 >> label/local4 >> label/iscsi3 >> label/iscsi4 >> cache >> label/local5 >> label/local6 >>=20 >> A sustained read throughput of 180 MB/s, 45 MB/s on each iscsi disk >> according to "zpool iostat", nothing on local disks (strange but I >> noticed that IOs always prefer iscsi disks to local disks). >> No write IOs. >>=20 >> Let's disconnect all iSCSI disks : >> iscsictl -Ra >>=20 >> Expected behavior : >> IO activity flawlessly continue on local disks. >=20 > Perhaps I'm misunderstanding your setup, but my expected behavior = would be exactly what you see.=20 Unfortunately, what I see is the following quoted : >> What happened : >> All IOs stalled, server only answers to IOs are made to its zroot = pool. >> All commands related to the iSCSI disks (iscsictl), or to ZFS = (zfs/zpool), >> don't return. (and I would have expected the IO activity to flawlessly continue)
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