[oi-dev] SSD-based pools
Igor Kozhukhov
ikozhukhov at gmail.com
Mon Oct 13 23:24:44 UTC 2014
I have zpool on SATA SSD 128GB on LSI 9211-8i with builds - I have no
problems with it.
I¹m using dilos with mpt_sas updates from illumos-nexenta,
But I¹m using only one SSD drive on zpool.
It configured with lz4 compression.
I think illumos builds are loading it with a lot of IOPs.
I¹m using different directories with sources with parallel builds.
--
Best regards,
Igor Kozhukhov
From: "Andrew M. Hettinger" <AHettinger at Prominic.NET>
Reply-To: OpenIndiana Developer mailing list <oi-dev at openindiana.org>
Date: Tuesday 14 October 2014 03:12
To: OpenIndiana Developer mailing list <oi-dev at openindiana.org>
Subject: Re: [oi-dev] SSD-based pools
> Ok,
>
> I've now tried to run this on another machine (no hardware in common, save the
> SSDs), with
> interlopers, still generating checksum errors. I'm using iozone to load it up
> for testing (I was
> initially asked to do this to demonstrate how much of an improvement we could
> expect).
>
> I was wondering if you guys had any more thoughts or could do a similar test?
>
> Andrew Hettinger
> http://Prominic.NET | Skype: AndrewProminic
> Tel: 866.339.3169 (toll free) -or- 1.217.356.2888 x. 110 (int'l)
> Fax: 866.372.3356 (toll free) -or- 1.217.356.3356 (int'l)
>
> "Schweiss, Chip" <chip at innovates.com> wrote on 09/30/2014 07:49:44 AM:
>
>> > From: "Schweiss, Chip" <chip at innovates.com>
>> > To: OpenIndiana Developer mailing list <oi-dev at openindiana.org>
>> > Date: 09/30/2014 07:58 AM
>> > Subject: Re: [oi-dev] SSD-based pools
>> >
>> > On Mon, Sep 29, 2014 at 6:14 PM, Andrew M. Hettinger
>> <AHettinger at prominic.net
>>> > > wrote:
>> > Bob Friesenhahn <bfriesen at simple.dallas.tx.us> wrote on 09/29/2014
>> > 05:57:26 PM:
>> >
>>> > > How would ZFS know if the data stored is "incorrect" from the user's
>>> > > perspective?
>>> > >
>> >
>> > Presumably because the checksum is wrong.
>> >
>> > Exactly, if the data is returned incorrect from the SSD ZFS will
>> > detect it via checksum. It will then rebuild from the raidz1
>> > parity, if that fails it will return a data read error.
>> >
>> > In relation to the original topic, with 163 days uptime, the scratch
>> > pool has had zero checksum errors. It gets completely rewritten
>> > about twice a week on average. At its peak usage it was rewritten
>> > daily for about 45 days.
>> >
>> > root at hcp-iops1:~# uptime
>> > 07:44am up 163 days 20:57, 1 user, load average: 0.13, 0.15, 0.16
>> > root at hcp-iops1:~# zpool status scratch
>> > pool: scratch
>> > state: ONLINE
>> > scan: scrub repaired 0 in 7h59m with 0 errors on Sat Sep 6 00:59:21 2014
>> > config:
>> >
>> > NAME STATE READ WRITE CKSUM
>> > scratch ONLINE 0 0 0
>> > raidz1-0 ONLINE 0 0 0
>> > c1t500253855035D1B1d0s0 ONLINE 0 0 0
>> > c1t500253855035D12Fd0s0 ONLINE 0 0 0
>> > c1t500253855035D114d0s0 ONLINE 0 0 0
>> > c1t500253855035D10Ed0s0 ONLINE 0 0 0
>> > c1t500253855035D109d0s0 ONLINE 0 0 0
>> > raidz1-1 ONLINE 0 0 0
>> > c1t500253855035D1C1d0s0 ONLINE 0 0 0
>> > c1t500253855035D1C0d0s0 ONLINE 0 0 0
>> > c1t500253855035D1BFd0s0 ONLINE 0 0 0
>> > c1t500253855035D1BEd0s0 ONLINE 0 0 0
>> > c1t500253855035D1B5d0s0 ONLINE 0 0 0
>> > raidz1-2 ONLINE 0 0 0
>> > c1t500253855035D1E3d0s0 ONLINE 0 0 0
>> > c1t500253855035D1E1d0s0 ONLINE 0 0 0
>> > c1t500253855035D1C8d0s0 ONLINE 0 0 0
>> > c1t500253855035D1C6d0s0 ONLINE 0 0 0
>> > c1t500253855035D1C3d0s0 ONLINE 0 0 0
>> > raidz1-3 ONLINE 0 0 0
>> > c1t500253855035D8C0d0s0 ONLINE 0 0 0
>> > c1t500253855035D8BDd0s0 ONLINE 0 0 0
>> > c1t500253855035D1F6d0s0 ONLINE 0 0 0
>> > c1t500253855035D1E6d0s0 ONLINE 0 0 0
>> > c1t500253855035D1E5d0s0 ONLINE 0 0 0
>> > raidz1-4 ONLINE 0 0 0
>> > c1t500253855035D8C7d0s0 ONLINE 0 0 0
>> > c1t500253855035D8C6d0s0 ONLINE 0 0 0
>> > c1t500253855035D8C3d0s0 ONLINE 0 0 0
>> > c1t500253855035D8C2d0s0 ONLINE 0 0 0
>> > c1t500253855035D8C1d0s0 ONLINE 0 0 0
>> > raidz1-5 ONLINE 0 0 0
>> > c1t500253855035E2F6d0s0 ONLINE 0 0 0
>> > c1t500253855035E2F5d0s0 ONLINE 0 0 0
>> > c1t500253855035E2ECd0s0 ONLINE 0 0 0
>> > c1t500253855035E2EBd0s0 ONLINE 0 0 0
>> > c1t500253855035E2D7d0s0 ONLINE 0 0 0
>> > raidz1-6 ONLINE 0 0 0
>> > c1t500253855035F484d0s0 ONLINE 0 0 0
>> > c1t500253855035F483d0s0 ONLINE 0 0 0
>> > c1t500253855035F480d0s0 ONLINE 0 0 0
>> > c1t500253855035F472d0s0 ONLINE 0 0 0
>> > c1t500253855035F46Fd0s0 ONLINE 0 0 0
>> > raidz1-7 ONLINE 0 0 0
>> > c1t5002538550363742d0s0 ONLINE 0 0 0
>> > c1t500253855036373Ed0s0 ONLINE 0 0 0
>> > c1t50025385503633BDd0s0 ONLINE 0 0 0
>> > c1t5002538550363164d0s0 ONLINE 0 0 0
>> > c1t500253855035F489d0s0 ONLINE 0 0 0
>> > raidz1-8 ONLINE 0 0 0
>> > c1t500253855036378Ad0s0 ONLINE 0 0 0
>> > c1t5002538550363789d0s0 ONLINE 0 0 0
>> > c1t5002538550363786d0s0 ONLINE 0 0 0
>> > c1t500253855036374Cd0s0 ONLINE 0 0 0
>> > c1t500253855036374Bd0s0 ONLINE 0 0 0
>> > raidz1-9 ONLINE 0 0 0
>> > c1t500253855035D1F4d0s0 ONLINE 0 0 0
>> > c1t500253855035D1ECd0s0 ONLINE 0 0 0
>> > c1t500253855035D1E2d0s0 ONLINE 0 0 0
>> > c1t500253855035D1DAd0s0 ONLINE 0 0 0
>> > c1t500253855035D1B2d0s0 ONLINE 0 0 0
>> > raidz1-10 ONLINE 0 0 0
>> > c1t500253855035D12Dd0s0 ONLINE 0 0 0
>> > c1t500253855035D8C8d0s0 ONLINE 0 0 0
>> > c1t500253855035D8C5d0s0 ONLINE 0 0 0
>> > c1t500253855035D8C4d0s0 ONLINE 0 0 0
>> > c1t500253855035D1F8d0s0 ONLINE 0 0 0
>> > raidz1-11 ONLINE 0 0 0
>> > c1t5002538550363793d0s0 ONLINE 0 0 0
>> > c1t500253855035E2DBd0s0 ONLINE 0 0 0
>> > c1t500253855035E2DAd0s0 ONLINE 0 0 0
>> > c1t500253855035E2D9d0s0 ONLINE 0 0 0
>> > c1t500253855035D12Ed0s0 ONLINE 0 0 0
>> > spares
>> > c1t5002538550363794d0s0 AVAIL
>> > c1t5002538550363797d0s0 AVAIL
>> > c1t500253855035E2D8d0s0 AVAIL
>> >
>> > errors: No known data errors_______________________________________________
>> > oi-dev mailing list
>> > oi-dev at openindiana.org
>> > http://openindiana.org/mailman/listinfo/oi-dev
> _______________________________________________ oi-dev mailing list
> oi-dev at openindiana.org http://openindiana.org/mailman/listinfo/oi-dev
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