From: "Bernd Maier" <bema@hush.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>
Subject: Re: [9fans] Fossil fs recovery
Date: Fri, 12 Aug 2011 11:53:09 +0200 [thread overview]
Message-ID: <20110812095309.3847714DBD4@smtp.hushmail.com> (raw)
Many thanks! I will try it this weekend.
One additional question:
How much RAM needs the Fossil+Venti Fileserver in total?
-Bernd
On Thu, 11 Aug 2011 10:11:27 +0200 David du Colombier
<0intro@gmail.com> wrote:
>In fact, it's pretty straightforward.
>
>In the following example, I consider you have a disk sdE0
>with Fossil, and you want to add a disk sdE1 with Venti.
>
>Create the Venti partitions:
>
>disk/fdisk -baw /dev/sdE1/data
>disk/prep -bw -a^(isect arenas bloom) /dev/sdE1/plan9
>
>Format the Venti file systems:
>
>venti/fmtisect isect /dev/sdE1/isect
>venti/fmtarenas arenas /dev/sdE1/arenas
>venti/fmtbloom /dev/sdE1/bloom
>
>Since the bloom filter requires memory equal to its size
>on disk, you could need to pass the parameter -s to fmtbloom
>to specify its size or directly adjust the partition size.
>Keep in mind that Venti use 20% total memory by default, and
>1/3 of it is allocated to the bloom filter.
>For example, with 1 GB of memory, you cannot have a bloom filter
>larger than 64 MB (which is sufficient) with the default settings.
>Of course, the bloom filter is optional anyway.
>
>Configure Venti:
>
>echo 'index main
>isect /dev/sdE1/isect
>arenas /dev/sdE1/arenas
>bloom /dev/sdE1/bloom' | venti/conf -w /dev/sdE1/arenas
>
>Initialize the index sections:
>
>venti/fmtindex /dev/sdE1/arenas
>
>Read your current Fossil configuration:
>
>fossil/conf /dev/sdE0/fossil > fossil.conf
>
>Edit fossil.conf, it should look like something like:
>
>fsys main config /dev/sdE0/fossil
>fsys main open -V -c 3000
>
>Remove -V to open and srv if needed, then
>add the following line to enable automatic
>snapshots:
>
>fsys main snaptime -s 60 -a 0530 -t 2880
>
>(snapshot at 05:30, temporary snapshot each
> hour and discarded after two days)
>
>Write your new Fossil configuration:
>
>fossil/conf -w /dev/sdE0/fossil < fossil.conf
>
>Mount your 9fat file system, then add the following line
>to the file /n/9fat/plan9.ini:
>
>venti=#S/sdE1/arenas
>
>After rebooting, the current Fossil content will be dumped
>to Venti.
>
>--
>David du Colombier
next reply other threads:[~2011-08-12 9:53 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-12 9:53 Bernd Maier [this message]
2011-08-12 12:03 ` David du Colombier
-- strict thread matches above, loose matches on Subject: below --
2011-08-14 14:49 Bernd Maier
2011-08-10 16:21 Bernd Maier
2011-08-10 17:46 ` David du Colombier
2011-08-10 21:58 ` Steve Simon
2011-08-10 22:12 ` ron minnich
2011-08-11 8:11 ` David du Colombier
2011-08-11 13:46 ` David Leimbach
2011-08-11 13:56 ` Jack Norton
2011-08-11 15:37 ` David du Colombier
2011-08-11 15:15 ` Steve Simon
2011-08-11 15:30 ` David du Colombier
2011-08-13 19:12 ` geoff
2011-08-13 23:44 ` Lyndon Nerenberg (VE6BBM/VE7TFX)
2011-08-14 6:21 ` Steve Simon
2011-08-14 11:48 ` Francisco J Ballesteros
2011-08-14 17:55 ` David du Colombier
2011-08-10 12:35 Bernd Maier
2011-08-10 15:25 ` Steve Simon
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