Re: Inconsistent multi-block io
From: K Gopalakrishnan <kaygopal_at_gmail.com>
Date: Tue, 8 Jul 2008 17:03:44 -0700 (PDT)
Message-ID: <23c64f69-4b82-48a7-855f-51c27affa098@k37g2000hsf.googlegroups.com>
Date: Tue, 8 Jul 2008 17:03:44 -0700 (PDT)
Message-ID: <23c64f69-4b82-48a7-855f-51c27affa098@k37g2000hsf.googlegroups.com>
Hi,
It is because,
- The missing blocks may be already in cache
(If the block 5 is already in cache, you will see two multiblock reads
of blocks 1-4 and 6-16) - You may be hitting extent boundary
(multiblock reads can not spawn extents)
- You may be hitting the last block
(or hitting HWM)
There may be some more, but these are the most common .
-Gopal Received on Tue Jul 08 2008 - 19:03:44 CDT