[Gluster-users] cloud config with multiple internal drives on each node

Craig Flockhart craigflockhart at yahoo.com
Tue Feb 10 01:53:45 UTC 2009

Thanks, this now works, although I get poor write performance like a previous poster complained about: Around 7MB/s with "replicated distributed" and around 5MB/s with "distributed replicated pairs". This compares to 41MB/s with no replication.

From: Krishna Srinivas <krishna at zresearch.com>
To: Craig Flockhart <craigflockhart at yahoo.com>
Cc: gluster-users at gluster.org
Sent: Sunday, February 8, 2009 11:44:35 PM
Subject: Re: [Gluster-users] cloud config with multiple internal drives on  each node


In case you have 4 machines each with 4 drives.

you can replicate each drive of server1 with corresponding drive of
server2 using AFR.
you can replicate each drive of server3 with corresponding drive of
server4 using AFR.

So you have 8 AFRs.

You can use distribute (aka DHT) to aggregate the 8 AFRs.

Can you start with fresh backend directories and see if you still get
those errors? Because previous extended attributes on the directories
might be causing those errors.

If you still see the errors can you post your spec files?


On Fri, Feb 6, 2009 at 9:57 AM, Craig Flockhart
<craigflockhart at yahoo.com> wrote:
> Hi,
> I'm trying to come up with a working configuration for some machines as
> follows:
> - each is a client and a server and can see all the other nodes' storage and
> its own
> - each has 4 identical hard drives
> - replication (one or possibly two replicas)
> - high availability (continues to function if one replicated node of a pair
> goes down)
> It's something like the example configuration with NUFA/unify, but with
> replication across nodes and HA too.
> Any suggested configuration? Just a general explanation of the setup is
> fine.
> All my efforts so far have resulted in error messages about dht anomalies
> with "holes=1, overlaps=1" in the logs. I'm using 2.0.0rc1.
> thanks!
> Craig
> _______________________________________________
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> Gluster-users at gluster.org
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