From: Clifton, Pablo (Pablo.Clifton@BCBSFL.COM)
Date: Mon Jan 12 2004 - 11:08:02 EST
Praveen-
I see a lot of different definitions out there for stripe width and size.
*My understanding* is that:
stripe width = The number of physical volumes that accomodate the striped lv.
= the number of drives striped across, example: 8 disks
stripe size = Specifies the size of the stripe for a striped logical volume.
In AIX the size can be 4K, 16K, 32K, 64K or 128K bytes.
This is also referred to as the "stripe unit size" or "chunk size".
The ["stripe width" * "stripe size"] = ["stripe length"]
but you will see "stripe size" and "stripe length" swapped around a lot.
The Redbook: "AIX Logical Volume Manager from A to Z" has some info on striping.
Remember:
striping is done at the LV level
To benefit from striping, the stripe size needs to be low like- 128K, 64K in order
to get multiple drives active.
-pablo
---
Pablo Clifton
UNIX Technical Services
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
Kumar, Praveen (cahoot)
Sent: Monday, January 12, 2004 10:27 AM
To: aix-l@Princeton.EDU
Subject: STRIPE WIDTH
HI *,
What's the difference between STRIPE WIDTH & STRIPE SIZE. Is it
no.of stripes and size of each stripe resp or am i wrong.
Also can someone brief on lockstat command,i have gone through the manuals
but could not get much info...
TIA
Praveen.K
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