Re: iostat - multiblock read count

From: Noons <wizofoz2k_at_yahoo.com.au>
Date: Tue, 24 May 2005 21:53:49 +1000
Message-ID: <429315ca$0$5622$5a62ac22@per-qv1-newsreader-01.iinet.net.au>

chao_ping apparently said,on my timestamp of 24/05/2005 7:29 PM:
>

>>>You see, until kernel release 2.6 (or patched 2.4), Linux will
>>>"secretly" transform any single I/O request for more than 32K bytes
>>>into as many 32K requests as needed

>
> Can you provide some detail about this? For example, metalink id, or
> URL about linux kernel about this.
>
>
> And Utkanbir, since it is for test, can you shutdown one node and
> perform your test again?

That's funny: somehow Utkanbir's reply never made it to my server. I wonder why...

Anyways: see bug 4039598 (which is not really a bug...) and Red Hat's Bugzilla problem 148838.
This doc also has some info on it:
http://www.oracle.com/technology/deploy/availability/pdf/ora_lcs.pdf And never hearing about it doesn't mean it's incorrect: it just means nobody told you before the simple facts. Now you know. ;)

-- 
Cheers
Nuno Souto
in sunny Sydney, Australia
wizofoz2k_at_yahoo.com.au.nospam

Received on Tue May 24 2005 - 06:53:49 CDT