From: anthony mayes <anmayes@siue.edu>
To: "Rechenberg, Andrew" <ARechenberg@shermanfinancialgroup.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: raid0 + raid1 question
Date: Thu, 09 Oct 2003 16:00:11 -0500 [thread overview]
Message-ID: <3F85CC5B.5020107@siue.edu> (raw)
In-Reply-To: <1065729282.10027.127.camel@localhost.localdomain>
Rechenberg, Andrew wrote:
>We actually used to backup our data in this fashion, but we used a
>triple mirror. We had three hardware RAID arrays and then we used Linux
>software RAID to mirror those three (i.e. /dev/hdc1, /dev/hdd1, and
>/dev/hde1). At night we used mdadm to break the mirror, mount the
>removed partition and backup, and then add the partition back in and
>re-mirror.
>
Exactly what we do now.
>The database is unavailable for less than 1 minute while the snapshot is
>taken (it actually takes less than 10 seconds to snapshot ~360GB, the
>other time is just the script sleeping, making sure all transactions
>complete). This solution ensures a consistent database, while also
>having near-line backups available on disk.
>
I'm assuming the snapshot it the same size as the FS to backup. What if
you don't have enough disk space to do this?
--
Anthony Mayes
UNIX Server Administration
Southern Illinois University Edwardsville
anmayes@siue.edu
next prev parent reply other threads:[~2003-10-09 21:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-08 20:53 raid0 + raid1 question anthony mayes
2003-10-09 9:55 ` Lars Marowsky-Bree
2003-10-09 19:54 ` Rechenberg, Andrew
2003-10-09 21:00 ` anthony mayes [this message]
2003-10-10 2:37 ` Kevin P. Fleming
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