Date: Thu, 16 Jan 2014 07:46:52 +0100 From: Gomes do Vale Victor <ulysse31@gmail.com> To: "kpneal@pobox.com" <kpneal@pobox.com> Cc: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: Re: zpool import taking weeks ... Message-ID: <628AA905-09F4-43DA-8EB0-820557EEFC79@gmail.com> In-Reply-To: <20140115223403.GA69817@neutralgood.org> References: <CAFSDvD2hLNN_CupeVKu02bLLUS1EFuTdZZw5Z9xoiNFZ0p4_fg@mail.gmail.com> <CAOjFWZ5dgw0nZzWFhWOCS-HSseBC=uavc=aQM%2Byht-R5a4Xfow@mail.gmail.com> <CAB7-odmXb%2B0KvEh6vDPstt89-O=ccL81MAtX2hRLWk%2BRcVZzUA@mail.gmail.com> <CAOjFWZ6r2LYWAw_eB4f9AEoy_w313rRy44t9uBdNMK2MJTmQwg@mail.gmail.com> <CAFSDvD25ceAZT_WBj9yFfh13KrVeqVtcNHWB85B3rNzk1b_Ang@mail.gmail.com> <20140115223403.GA69817@neutralgood.org>
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Hi Le 15 janv. 2014 =C3=A0 23:34, kpneal@pobox.com a =C3=A9crit : > On Wed, Jan 15, 2014 at 09:29:27AM +0100, Ulysse 31 wrote: >> Thanks for the answer. >>=20 >> I was beginning to ... well ... have a little start of panic ^^' >> The import still running but no real activity on disks : sometimes, >> maybe something like each hour, there is some really brief led >> activity on the hdd, but nothing more. >> one thing that would be great is to have an overall percentage or just >> counting of what is done or what is left ... for now i don't even know >> if it's gonna end on the next 5 mins or on the next 5 weeks :s >> So now since i have no real activity on the actual zpool import (the >> last import started a week ago, it do not have go out of swap since i >> added lot of swap (260G HDD swap)), should i just let it run, or make >> a reboot and start over ? >=20 > Memory used by the ZFS DDT is (someone correct me if I'm wrong) kernel > memory that I don't think is swappable. So adding more swap space won't > help. (Again, correct me if I'm out of date or just wrong please.) >=20 Yes, it's kernel memory but appears as "wired" not as "used", and it does no= t change the fact that zpool import goes out of swap without the swap disk (= tested and approved). With the disk memory is all (64Gb) marked as wired (ke= rnel usage) plus 780Mo used in swap.=20 > Worse, keeping track of swap space takes kernel memory for the bookkeeping= . Again, I have tested zpool import WITHOUT the disk, and it as gone "out of s= wap" (out of memory) since I added the disk it as taken all mem plus swap. P= lease read my first and my post . > That memory for swap bookkeeping is memory that can't be used by ZFS. So > the large swap device you added is only making the situation worse. This > also implies that you'll get best results by not having any swap space > at all during the problematic import. You can re-add it once the import > is completed. >=20 I really don't know if ZFS can swap or not, what I know is that system and l= ivecd goes out of memory on import. One possible solution is simply ZFS takes all RAM leaving swap to user land .= .. But result is the same : machine crashes without it. > --=20 > Kevin P. Neal http://www.pobox.com/~kpn/ >=20 > Seen on bottom of IBM part number 1887724: > DO NOT EXPOSE MOUSE PAD TO DIRECT SUNLIGHT FOR EXTENDED PERIODS OF TIME.
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