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Date:	Wed, 14 May 2008 23:38:44 +0400
From:	Evgeniy Polyakov <>
To:	Jeff Garzik <>
Cc:	Sage Weil <>,,,
Subject: Re: POHMELFS high performance network filesystem. Transactions, failover, performance.

On Wed, May 14, 2008 at 03:03:40PM -0400, Jeff Garzik ( wrote:
> >Well, it depends... If we are talking about single node perfromance,
> >then any protocol, which requries to wait for authorization (or any
> >approach, which waits for acknowledge just after data was sent) is slow.
> Quite true, but IMO single-node performance is largely an academic 
> exercise today.  What production system is run without backups or 
> replication?

If cluster is made out of 2-3-4-10 machines, it does want to get maximum
single node performance. But I agree that in some cases we have to
sacrifice of something in order to find something new. And the larger
cluster becomes, for more things we can close eyes on.
	Evgeniy Polyakov
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