RE: NFS and direct IO

From: Chitale, Hemant Krishnarao <Hemant.Chitale_at_sc.com>
Date: Mon, 18 Apr 2011 11:18:54 +0800
Message-ID: <8D8B0B559331204097D63ABDAC32FCA1725797_at_HKMGAXMB107A.zone1.scb.net>


The note still requires forcedirectio on Solaris and HPUX and cio on AIX even for non-RAC implementations.

Kyle,
It's not clear to me if the NFS implementation is on Linux or on a Unix flavour, because you say " The NFS database is using direct-IO so there is no longer the buffering from the UNIX."

Hemant K Chitale

-----Original Message-----
From: D'Hooge Freek [mailto:Freek.DHooge_at_uptime.be] Sent: Sunday, April 17, 2011 1:46 AM
To: kylelf_at_gmail.com; ORACLE-L
Subject: RE: NFS and direct IO

Kyle,
<deleted>

Directio is only required on linux when working with rac. See note Mount Options for Oracle files when used with NAS devices [ID 359515.1]

Regards,

Freek D'Hooge
Uptime
Oracle Database Administrator
email: freek.dhooge_at_uptime.be
tel +32(0)3 451 23 82
http://www.uptime.be
disclaimer: www.uptime.be/disclaimer



From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of kyle Hailey Sent: zaterdag 16 april 2011 18:31
To: ORACLE-L
Subject: NFS and direct IO

Is there any requirement to use direct I/O with NFS? (besides performance)

from metalink note: Enterprise Linux: Linux, Filesystem & I/O Type Supportability [ID 279069.1]

    DIRECTIO is required for database files on NAS (network attached storage).

Is it really  required? I can't find any other reference that supports this.

<deleted>

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Received on Sun Apr 17 2011 - 22:18:54 CDT

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