Why Oracle 11g need forcedirectio option? Post: 302555997

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Special Forums UNIX and Linux Applications Why Oracle 11g need forcedirectio option? Post 302555997 by radoulov on Friday 16th of September 2011 09:48:47 AM

09-16-2011

Registered User

One of the reasons is outlined in the following MOS note (and it's not only on HP, as the note title may seem to imply),
I don't know if it applies to your case:

Potential Lost Writes: RAC on NAS using NFS may not use DIRECTIO or HP on NFS (Doc ID 566545.1)

Last edited by radoulov; 09-16-2011 at 10:54 AM..

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showmount

SHOWMOUNT(8)						    BSD System Manager's Manual 					      SHOWMOUNT(8)

NAME

     showmount -- show remote NFS mounts on host

SYNOPSIS

     showmount [-Ae36] [-a | -d] [host]

DESCRIPTION

     showmount shows status information about the NFS server on host.  By default it prints the names of all hosts that have NFS file systems
     mounted on the host. See NFS: Network File System Protocol Specification, RFC 1094, Appendix A, and NFS: Network File System Version 3
     Protocol Specification, Appendix I, for a detailed description of the protocol.

     -A      Search for NFS servers advertised via Bonjour.

     -a      List all mount points in the form: host:dirpath

     -d      List directory paths of mount points instead of hosts.

     -e      Show the host's exports list.

     -3      Use mount protocol Version 3, compatible with NFS Version 3.

     -6      Use only IPv6 addresses to contact servers.

SEE ALSO

     mount(1), mountd(8), nfsd(8), mDNSResponder(8)

BUGS

     The mount daemon running on the server only has an idea of the actual mounts, since the NFS server is stateless.  showmount will only display
     the information as accurately as the mount daemon reports it.

HISTORY

     The showmount utility first appeared in 4.4BSD.

4th Berkeley Distribution					September 26, 2010					 4th Berkeley Distribution