RE: 10G and UFS - long write times

True Stig.

However that implies that there will be no difference between 9i and 10G and I am seeing a big difference.
The only set up I have not got yet is a 9i install and a 10G on the same server with local disk. I am working on that next

John

-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Stig Hornuff Sent: 08 June 2006 10:24
To: Hallas, John, Tech Dev; F.Castillo_at_hzd.hessen.de; oracle-l_at_freelists.org
Subject: RE: 10G and UFS - long write times

As I read your description you are basically comparing I/O writes on SAN

disks and local disks.
Is that what you are doing on various Oracle versions?

If it is, then note: Solaris using local disks (ie. in the very same box as
the CPU) will Always perform a write all they way down on disk - verified
writes!!
If disks are remote/attached Solaris "allows" itself to rely on writes being
successfully submittet to the remote I/O-systems (ie. the SAN, T3, whatever....).

In simple words: Local disk are waaaaayyyyy slower than SAN and remote disk
subsystems.

/S

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