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RE: [ldap] Implementation Suggestions

On Fri, 20 Jan 2006, Spicer, Kevin wrote:

From: Daniel Henninger [mailto:daniel@ncsu.edu]
It may be worth adding the noatime flag to the filesystems that hold
data and (bdb) logs.  You are indexing a lot of attributes, do you

No atime?  That's interesting.  I've never heard of that, what does
that do?
From mount_ufs(1M)
                     By default, the file system is mounted with
                     normal  access  time  (atime) recording. If
                     noatime is specified, the file system  will
                     ignore access time updates on files, except
                     when they  coincide  with  updates  to  the
                     ctime  or  mtime.  See stat(2). This option
                     reduces disk activity on file systems where
                     access  times are unimportant (for example,
                     a Usenet news spool).

                     noatime turns  off  access  time  recording
                     regardless of dfratime or nodfratime.

                      The POSIX standard  requires  that  access
                     times  be marked on files. -noatime ignores
                     them unless the file is also modified.
I think this was introduced in Sol7 or 8,

This is still not a lot files to really make a difference.

You are better off looking at forcedirectio if it is available on solaris 8. This certainly helps with sql db performance.