Re: [dm-devel] mirrored device with thousand of mappingtableentries

["Eli Malul" <eli malul kaminario com>]

According to your suggestion I need to map the non contiguous extents
into linear devices and mirror them.

But, what if I am required to preserve the original extent's offset?
Since I need to mirror an existing device with user data already on
it...

-----Original Message-----
From: Alasdair G Kergon [mailto:agk redhat com] 
Sent: Monday, February 28, 2011 3:29 PM
To: Eli Malul
Cc: device-mapper development
Subject: Re: [dm-devel] mirrored device with thousand of
mappingtableentries

On Mon, Feb 28, 2011 at 03:13:42PM +0200, Eli Malul wrote:
> But, do you know why having 10,000 extents is causing this
overwhelming
> memory usage?
 
Nobody considered having a huge number of tiny mirrors reasonable or
necessary
so no attempt has been made to optimise that situation.

Alasdair