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From: Vitaly Kuznetsov <vitty@altlinux.ru>
To: ALT Linux sysadmins' discussion <sysadmins@lists.altlinux.org>
References: <4C717053.4080901@rambler.ru> <201008261007.15033.kde@kde.kiev.ua>
	<8739u1ajlp.fsf@vps2.branbackup.org>
	<201008261105.48939.kde@kde.kiev.ua>
Date: Thu, 26 Aug 2010 09:52:43 +0000
In-Reply-To: <201008261105.48939.kde@kde.kiev.ua> (Denis Kuznetsov's message
	of "Thu, 26 Aug 2010 11:05:48 +0300")
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Subject: Re: [Sysadmins] =?utf-8?b?0JLQuNGA0YLRg9Cw0LvQuNC30LDRhtC40Y8=?=
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Denis Kuznetsov <kde@kde.kiev.ua> writes:

> On Thursday 26 August 2010 11:01:06 Vitaly Kuznetsov wrote:
>
>> Вы, вероятно, что-то себе неверно представляете по поводу ocfs2 в том
>> смысле, что отличий от gfs там немного (с пользовательской точки зрения).
>> ocfs2 поверх drbd позволяет смонтировать одну и ту же fs на двух узлах
>> на запись.
> А разве ocfs2 не позволяет хранить одни и теже данные на 2-х и более
> нодах не прибегая к использованию drbd ?

Two popular designs in this class of file systems are distributed
parallel (LUSTRE) and shared disk (OCFS2, GFS2). 
...
Shared disk file systems, on the other hand, scale to 100+ nodes. As the
name suggests, such file systems require a shared disk (SAN). All server
nodes in the cluster must be able to perform I/O directly and
concurrently to the disk.

-- 
Vitaly Kuznetsov, ALT Linux