From: Steven Sim (steven.sim@faplccc.net)
Date: Sun Jan 01 2006 - 06:27:26 EST
Hello Gurus;
I'm a person with a few years of Solaris experience and my boss just
sent me to an AIX Jumpstart Course for Experience Unix Administrator.
(Jumpstart not as Solaris's jumpstart...just a simple marketing term
jumpstart).
In the course they elaborated quite extensively on AIX LVM's disk
physical partitioning i.e. where they divide the physical disk into 1016
physical partitions.
The size of the partition would depend on the size of the physical hard
disk and would be somewhere between 2 raised to the power of x where
0 < 2 <= 8
Thus x would range from 1 to 256 Mbytes
The course emphasized extensively on the placement of each logical
volume's PP i.e. the above physical partitioning (1016) layout...either
on the outer edge, middle or inner edge of the cylinderical disk.
Much emphasis was placed on the placement of these PP in the above three
region of the disk.
More importantly, the instructor elaborated on the fragmentation (NOT of
the Filesystem) of the logical volumes in these terms.
They then treated the File System fragementation differently
(fragmentation of the above logical partitions...which is different from
AIX view of physical partitioning)
In fact, their tools i.e. lspv etc etc showed clearly the PP layout on
the physical disk.
I can find no Solaris equivalent of this feature. And I am curious as to
how Solaris treats the above or what Sun thinks of the above AIX treatment.
(Frankly, I think it is an overkill but....)
I am FIRMLY in the Solaris camp and I believe strongly that Solaris is
far better OS than AIX. However, once again, I would like to know
perhaps from experienced Sun gurus the above AIX treatment.
PLEASE NOTE, we are NOT talking about file system fragmentation.
Warmest Regards
Steven Sim
Fujitsu Asia Pte. Ltd.
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