From: Tomasz Chmielewski <mangoo@wpkg.org>
To: Neil Brown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: how to synchronize two devices (RAID-1, but not really?)
Date: Tue, 15 May 2007 12:41:36 +0200 [thread overview]
Message-ID: <46498E60.9060407@wpkg.org> (raw)
In-Reply-To: <17993.34959.150157.200536@notabene.brown>
Neil Brown schrieb:
(...)
> An external bitmap means that if the link goes down, it keeps track of
> which blocks are in sync and which aren't, and when the link comes
> back up you re-add the missing device and the rebuild continues where
> it left off.
> mdadm --build /dev/md22 --level=1 --bitmap=/root/mybitmap \
> --write-behind --raid-disks=2 /dev/localdevice --write-mostly /dev/remotedevice
One more question - is there a way to estimate the size of the bitmap
file? Does it depend on the size of the array?
What bitmap file size can I expect for a 600 GB array?
--
Tomasz Chmielewski
http://wpkg.org
next prev parent reply other threads:[~2007-05-15 10:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-15 8:57 how to synchronize two devices (RAID-1, but not really?) Tomasz Chmielewski
2007-05-15 9:16 ` Peter Rabbitson
2007-05-15 9:27 ` Tomasz Chmielewski
2007-05-15 9:41 ` David Greaves
2007-05-15 9:50 ` Tomasz Chmielewski
2007-05-16 17:36 ` Bill Davidsen
2007-05-15 14:22 ` Gregory Seidman
2007-05-15 9:29 ` Gordon Henderson
2007-05-15 9:44 ` Tomasz Chmielewski
2007-05-15 10:16 ` Neil Brown
2007-05-15 10:36 ` Tomasz Chmielewski
2007-05-15 11:12 ` Neil Brown
2007-05-15 10:41 ` Tomasz Chmielewski [this message]
2007-05-15 11:07 ` Neil Brown
2007-05-15 11:21 ` Tomasz Chmielewski
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