[Ocfs2-users] Ocfs2-users Digest, Vol 25, Issue 1

[shashi]

> Message: 1
> Date: Tue, 03 Jan 2006 02:09:30 +0100
> From: Juraj Bednar <jooray at gmail.com>
> Subject: [Ocfs2-users] iscsi or some other form of shared storage?
> To: ocfs2-users at oss.oracle.com
> Message-ID: <43B9CECA.8090206 at gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
> 
> Hello,
> 
> 
>   I would like to ask about using shared storage for ocfs2. I would like 
> to have two linux servers connected using dedicated 1Gbps connection and 
> share the same data. I have no SAN, etc.
> 
>   What is the best approach of building the shared storage? I was 
> considering using iSCSI, having /dev/sda1 as a target and mounted from 
> the other machine. This would probably work, but this way, loosing 
> machine, which is iSCSI target means a single point of failure.

There are some iSCSI HA Solutions from EMC and NetAPP and other vendors .
> 
>   Doing RAID-1 on local driver and remote iSCSI drive could bring the 
> systems into inconsistent state, right?
Yes
> 
>   Is it possible to do some kind of data replication, which would not 
> cause problems to OCFS2? Any links to related setups, comments, etc. 
> appreciated.

You can do data replication over the network (RAID-1 over network) . 
DRBD (www.drbd.org) is the right solution for you . It will work with 
OCFv2 also . There are some other paid solution from IBM , VERITAS 
,LifeKeeper.....,etc ..

> 
> 
>    Thanks,
> 
>     Juraj
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Tue, 03 Jan 2006 13:11:10 +0100
> From: Juraj Bednar <jooray at gmail.com>
> Subject: [Ocfs2-users] ddraid?
> To: ocfs2-users at oss.oracle.com
> Message-ID: <43BA69DE.6050901 at gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
> 
> Hello,
> 
> 
>   has anyone (except of author) tried ocfs2 with
> http://sourceware.org/cluster/ddraid/?
> 
>   I would really like to build a fully redundant storage without using a 
> SAN (with two PCs). But on the block device level (over network, using 
> raid), there are just so many things, that can go wrong with the 
> implementation, I'm not quite sure what to use.
> 
>   I've seen some reports of using GFS + GNBD + raid1 (fr1), but I 
> believe this will fail on the first split brain occasion.
> 
>   I would really like to have some good distributed filesystem solution, 
> that just works under Linux, in fact, I miss this for years. OCFS2 is a 
> good start (also with GFS), but the requirement of shared storage is 
> quite a problem (consider you want the cluster to span two independent 
> datacenters, ...).
> 
>   Any ideas are helpful.
> 
>   Thanks for the link to PVFS2, but I didn't find out, if it can be 
> redundant yet.
> 
>    Juraj.
> 
> 
> ------------------------------
> 
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> 
> End of Ocfs2-users Digest, Vol 25, Issue 1
> ******************************************

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