From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Greaves <david@dgreaves.com>
Subject: How long will a shrinkfs take?
Date: Thu, 10 Jun 2004 21:13:35 +0100
Message-ID: <40C8C0EF.7060704@dgreaves.com>
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Hi

I have a 1Tb reiserfs that I want to shrink to 500Gb
400Gb of data is used.

Any estimates as to how long this will take?
Sustained I/O is about 33Mb/s at the fs level, 44 Mb/s at the lv level 
and 65Mb/s at the md0 level.

(I didn't expect the fs to be so slow so I'm going to try a few tuning 
params on the new 500Gb space before copying over the data and growing 
back to a Tb)

Is it proportional to the amount of shrinkage (ie 2 hrs to reduce by 
50G, 20 hrs to reduce by 500Gb)

David