optimal disk access sizes/chunk sizes ?

From: <georg.buesse_at_db.com>
Date: Wed, 30 Sep 1998 19:35:48 +0100

(687.1 8-4-1998)) id 4125668F.0065F39B ; Wed, 30 Sep 1998 19:33:34 +0100
X-Lotus-FromDomain: ZENTRALE_at_DEUBAINT



Hi managers,

we are using HSZ50/70 with stripesets of 5 disks (mirrored by lsm and used by
advfs).
Our application is Oracle and SAP.
My questions are:
 a) what is the (actual/maximal) blocksize which lsm uses to access disks ?
      (is it possible to change it ?)
b) what is the (actual/maximal) blocksize which advfs uses to access disks
(directly or per lsm) ?
c) What is the optimal chunk size for my stripesets ?
d) Is it better to use smaller or bigger sets ?

Thank you in advace
  Georg Tasman
Received on Wed Sep 30 1998 - 17:34:23 NZST

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