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Date: Tue, 24 Mar 2009 06:08:34 -0700
From: malahal@us.ibm.com
Subject: Re: [linux-lvm] lvm mirror read performance, no load balance with PV ?
Message-ID: <20090324130834.GA12309@us.ibm.com>
References: <af3e5b60903240440q671356f5xd4e8e8c92ace8a56@mail.gmail.com>
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Sascha Thomas Spreitzer [sascha@spreitzer.name] wrote:
> Hello mailing list,
> 
> I currently sensed that LVM2 is not load balancing reads of mirrored
> LV's form their corresponding PV.

Yes, it just reads from the default_mirror (i.e. primary mirror leg).
There is a read-balancing patch. It is not upstream yet and most likely
not there in your kernel either.

Thanks, Malahal.