From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] copying fossil filesystem to a bigger disk
Date: Tue, 4 Oct 2011 12:00:55 -0400 [thread overview]
Message-ID: <dee9e9dd2eebb0dd2e8589398d4a1461@chula.quanstro.net> (raw)
In-Reply-To: <b3ef86d32452480d186d5eae6f6e1f3e@hamnavoe.com>
On Tue Oct 4 11:57:27 EDT 2011, 9fans@hamnavoe.com wrote:
> > i think the attached program ought to work.
>
> Doing i/o to random blocks, aren't you mostly measuring seek time?
the drive will write-combine sequential io, so that's not an option.
i've definately seen artifacts when doing completely random io on
4k drives.
you can try rewriting it to step by 8k and retry the test.
- erik
next prev parent reply other threads:[~2011-10-04 16:00 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-24 0:20 slash
2011-09-24 8:07 ` David du Colombier
2011-09-24 8:34 ` Steve Simon
2011-09-29 23:54 ` slash
2011-09-30 8:31 ` Richard Miller
2011-09-30 8:54 ` Richard Miller
2011-09-30 9:44 ` Charles Forsyth
2011-09-30 14:06 ` erik quanstrom
2011-09-30 14:16 ` Ethan Grammatikidis
2011-09-30 14:00 ` erik quanstrom
2011-10-01 10:36 ` slash
[not found] ` <CAEaiYYzXCfB2KbnDzBHTXytrfQqGUCepRg5Aj-c14ZoEz5hHaw@mail.gmail.c>
2011-10-01 13:51 ` erik quanstrom
2011-10-01 15:27 ` slash
2011-10-01 16:14 ` erik quanstrom
2011-10-01 16:23 ` erik quanstrom
2011-10-04 11:28 ` Richard Miller
2011-10-04 11:52 ` Charles Forsyth
2011-10-04 12:01 ` Richard Miller
2011-10-04 12:05 ` erik quanstrom
2011-10-04 12:09 ` Charles Forsyth
2011-10-04 12:13 ` Charles Forsyth
2011-10-04 12:19 ` dexen deVries
2011-10-04 12:27 ` Richard Miller
[not found] ` <CAOw7k5i3i+w_=pUuFjUCnxH1Tp5U0vh3v7wFUoBddfML9xG+ag@mail.gmail.c>
2011-10-04 12:17 ` erik quanstrom
2011-10-04 12:30 ` Charles Forsyth
[not found] ` <CAOw7k5hGWG16a5fTjtXBEBd2-gt=XnhjEJKFNjdPrB46_6=dBg@mail.gmail.c>
2011-10-04 12:34 ` erik quanstrom
2011-10-04 12:05 ` erik quanstrom
2011-10-04 12:15 ` Richard Miller
2011-10-04 12:17 ` erik quanstrom
2011-10-04 12:17 ` erik quanstrom
2011-10-04 12:33 ` Richard Miller
2011-10-04 12:52 ` dexen deVries
2011-10-04 13:05 ` dexen deVries
2011-10-04 14:13 ` erik quanstrom
2011-10-04 15:56 ` Richard Miller
2011-10-04 16:00 ` erik quanstrom [this message]
2011-10-04 16:42 ` Richard Miller
2011-10-04 16:45 ` erik quanstrom
2011-10-04 17:52 ` Charles Forsyth
2011-10-04 18:05 ` dexen deVries
2011-10-04 18:24 ` Bakul Shah
2011-10-04 18:29 ` erik quanstrom
2011-10-03 23:07 ` slash
2011-10-06 7:35 ` Peter A. Cejchan
2011-10-07 10:49 ` slash
2011-10-07 11:15 ` Peter A. Cejchan
2011-10-07 13:03 ` Steve Simon
2011-10-10 10:32 ` Peter A. Cejchan
[not found] ` <CAEaiYYya5eq3CoVbbZGqPf91_kMEcbkCQ_8WEL4yakFdenek5g@mail.gmail.c>
2011-10-07 13:17 ` erik quanstrom
2011-10-10 2:32 ` slash
[not found] ` <CAEaiYYy36ydHfw=Tg2YC9x9gEW7=MAHF2C6-UVbgr36G-qv=rA@mail.gmail.c>
2011-10-10 3:11 ` erik quanstrom
2011-10-10 10:15 ` slash
[not found] ` <d0c02b8a1e36c9329902a1183192d732@chula.quanstro.>
[not found] ` <CAEaiYYxoHLgMZddGZ4gCPvW-GuqwRYzytXgfezoi+vjUgxx9tg@mail.gmail.c>
2011-10-10 13:17 ` erik quanstrom
2011-10-11 8:51 ` slash
2011-10-11 8:55 ` slash
2011-10-11 15:01 ` slash
2011-10-11 15:36 ` David du Colombier
2011-10-12 19:24 ` slash
2011-10-13 7:07 ` Peter A. Cejchan
[not found] ` <CAEaiYYxsUzf70Ffhd3hzsBZcMb5=2yhfSCv5-nJ+_27wYbJKig@mail.gmail.c>
2011-10-03 23:10 ` erik quanstrom
2011-10-04 0:02 ` erik quanstrom
2011-10-04 7:58 ` dexen deVries
2011-10-04 9:52 ` Richard Miller
2011-10-04 9:34 ` Richard Miller
2011-10-07 7:47 ` [9fans] io patterns erik quanstrom
2011-09-24 8:30 ` [9fans] copying fossil filesystem to a bigger disk Steve Simon
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