From: antlists <antlists@youngman.org.uk>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] which linux RAID setup to choose?
Date: Sun, 3 May 2020 22:32:32 +0100 [thread overview]
Message-ID: <d5625513-25fe-82a1-c579-8c1d676d05bd@youngman.org.uk> (raw)
In-Reply-To: <CAGfcS_=YyJbCnCwUAi=RYghyf=K1dH98gKnBBbbwBAQJjuV2Qw@mail.gmail.com>
On 03/05/2020 21:07, Rich Freeman wrote:
> I don't think you should focus so much on whether read=write in your
> RAID. I'd focus more on whether read and write both meet your
> requirements.
If you think about it, it's obvious that raid-1 will read faster than it
writes - it has to write two copies while it only reads one.
Likewise, raids 5 and 6 will be slower writing than reading - for a
normal read it only reads the data disks, but when writing it has to
write (and calculate!) parity as well.
A raid 1 should read data faster than a lone disk. A raid 5 or 6 should
read noticeably faster because it's reading across more than one disk.
If you're worried about write speeds, add a cache.
Cheers,
Wol
next prev parent reply other threads:[~2020-05-03 21:32 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-03 5:44 [gentoo-user] which linux RAID setup to choose? Caveman Al Toraboran
2020-05-03 7:53 ` hitachi303
2020-05-03 9:23 ` Wols Lists
2020-05-03 17:55 ` Caveman Al Toraboran
2020-05-03 18:04 ` Dale
2020-05-03 18:29 ` Mark Knecht
2020-05-03 20:16 ` Rich Freeman
2020-05-03 22:52 ` Mark Knecht
2020-05-03 23:23 ` Rich Freeman
2020-05-03 21:22 ` antlists
2020-05-03 9:14 ` Wols Lists
2020-05-03 9:21 ` Caveman Al Toraboran
2020-05-03 14:27 ` Jack
2020-05-03 21:46 ` Caveman Al Toraboran
2020-05-03 22:50 ` hitachi303
2020-05-04 0:29 ` Caveman Al Toraboran
2020-05-04 7:50 ` hitachi303
2020-05-04 0:46 ` Rich Freeman
2020-05-04 7:50 ` hitachi303
2020-05-04 8:18 ` William Kenworthy
2020-05-03 23:19 ` antlists
2020-05-04 1:33 ` Caveman Al Toraboran
2020-05-03 20:07 ` Rich Freeman
2020-05-03 21:32 ` antlists [this message]
2020-05-03 22:34 ` Rich Freeman
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