[DRBD-user] Slow Buffered Read Performance with DRBD 8.4.1

Christian Balzer chibi at gol.com
Fri Feb 24 05:16:28 CET 2012

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On Thu, 23 Feb 2012 17:33:01 -0500 Chris Andrews wrote:

[snip]

I am in the process of writing a rather large and ranting post about my
experiences in the last two weeks but for your sake let me point out that
8.4.1 has been a major letdown for me as well.

8.3.12 doubled the performance of the "rewrite" test in bonnie++ compared
to 8.4.1 resulting in performance of the DRBD equal to the backing device.
Never mind things like syncer speeds doubling as well, and an ext4 mkfs no
longer pegging the reader process of the DRBD resource on the secondary
side to 100% CPU...

I'd respectfully submit that 8.4 just isn't ready for prime time yet.

Christian
-- 
Christian Balzer        Network/Systems Engineer                
chibi at gol.com   	Global OnLine Japan/Fusion Communications
http://www.gol.com/



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