From: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
To: linux-raid@vger.kernel.org
Subject: bitmap questions
Date: Wed, 13 Oct 2010 18:24:53 +0200 [thread overview]
Message-ID: <201010131824.53363.a.miskiewicz@gmail.com> (raw)
Hi,
I have a question on how bitmap works and what's shown in /proc/mdstat, for
example:
md2 : active raid10 sdc3[0] sdd3[3] sdb3[2] sda3[1]
60002560 blocks 64K chunks 2 near-copies [4/4] [UUUU]
bitmap: 1/1 pages [4KB], 65536KB chunk
- 1 bitmap for 4096 chunks
- if it shows 0/1 pages [0KB] what does it actually mean? Does that mean that
in case of resync it will resync _all_ 4096 chunks in that page or only chunks
that require that (for example 7 chunks) ?
- if it will resync all 4096 chunks what's the point of even allowing 1 page
setup (via mdadm)?
Thanks!
--
Arkadiusz Miśkiewicz PLD/Linux Team
arekm / maven.pl http://ftp.pld-linux.org/
--
Arkadiusz Miśkiewicz PLD/Linux Team
arekm / maven.pl http://ftp.pld-linux.org/
--
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next reply other threads:[~2010-10-13 16:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-13 16:24 Arkadiusz Miskiewicz [this message]
2010-10-14 5:02 ` bitmap questions Paul Clements
2010-10-14 6:00 ` Arkadiusz Miskiewicz
2010-10-14 12:11 ` John Robinson
2010-10-14 12:39 ` Mario 'BitKoenig' Holbe
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