From: John Robinson <john.robinson@anonymous.org.uk>
To: linux-raid@vger.kernel.org
Subject: Re: RAID5 created by 8 disks works with xfs
Date: Sun, 01 Apr 2012 13:28:54 +0100 [thread overview]
Message-ID: <4F784A06.1@anonymous.org.uk> (raw)
In-Reply-To: <jl9ate$2me$1@dough.gmane.org>
On 01/04/2012 11:33, David Brown wrote:
[...]
> For an application like this, it would probably make sense to put the
> xfs log (and the mdraid bitmap file, if you are using one) on a separate
> disk - perhaps a small SSD.
Now that you've suggested that, it occurs to me that for an application
like this, the OP might be better doing his multiple slow streams to a
spool folder on SSD, and copying over to the big array of spinning rust
when each stream completes. 200 streams of 500MB is 100GB of data, so a
pair of slightly larger SSDs in RAID1 (or RAID10, to balance the reads
coming off) would do nicely as a spool area.
This might also be a good application for bcache, FlashCache or whatever.
Cheers,
John.
next prev parent reply other threads:[~2012-04-01 12:28 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-31 1:22 RAID5 created by 8 disks works with xfs daobang wang
2012-03-31 7:59 ` Mathias Burén
2012-03-31 20:09 ` Stan Hoeppner
2012-04-01 1:16 ` daobang wang
2012-04-01 2:05 ` daobang wang
2012-04-01 5:13 ` Stan Hoeppner
2012-04-01 3:51 ` Stan Hoeppner
2012-04-01 5:12 ` daobang wang
2012-04-01 5:40 ` Stan Hoeppner
2012-04-01 5:59 ` daobang wang
2012-04-01 6:20 ` daobang wang
2012-04-01 7:08 ` Marcus Sorensen
2012-04-02 3:47 ` Stan Hoeppner
2012-04-05 0:48 ` daobang wang
[not found] ` <CACwgYDOtCoVF-p+KKqPYxHhA4vWF78Ueecx9hcVWLoyxFWzV9Q@mail.gmail.com>
2012-04-05 21:01 ` Stan Hoeppner
2012-04-06 0:25 ` daobang wang
2012-04-06 2:33 ` daobang wang
2012-04-06 6:00 ` Jack Wang
2012-04-06 6:45 ` daobang wang
2012-04-06 6:49 ` daobang wang
2012-04-06 8:18 ` Stan Hoeppner
2012-04-06 8:45 ` daobang wang
2012-04-06 11:12 ` Stan Hoeppner
2012-04-18 2:23 ` daobang wang
2012-04-02 3:12 ` Stan Hoeppner
2012-04-01 10:33 ` David Brown
2012-04-01 12:28 ` John Robinson [this message]
2012-04-02 6:59 ` David Brown
[not found] ` <CA+res+QkLi7sxZrD-XOcbR47CeJ5gADf7P6pa1w1oMf8CKSB4g@mail.gmail.com>
2012-04-02 8:01 ` John Robinson
2012-04-02 10:01 ` Jack Wang
2012-04-02 10:28 ` John Robinson
2012-04-02 20:41 ` Stan Hoeppner
2012-04-02 5:43 ` Stan Hoeppner
2012-04-02 7:04 ` David Brown
2012-04-02 20:21 ` Stan Hoeppner
2012-04-01 4:52 ` Stan Hoeppner
2012-04-01 8:06 ` John Robinson
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