From: Stefan Palme <kleiner@hora-obscura.de>
Subject: Re: disabling caching
Date: Fri, 14 Jul 2006 17:13:43 +0200
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> However, there is another alternative for your application.  NFS
> implements "close-to-open" caching.  This means an "open()" will force
> the client to revalidate its cache.  Since the *directory* is updated
> during a create, you need to open() the directory to force a cache
> refresh.  An opendir() on the directory containing the new file should
> enable your application to see the freshly created file immediately.

Because my application is written in Python, I have no access to the
opendir()-syscall directly. But the Python-Function "listdir()" from 
the os module uses this syscall (according to the Python source code).

But after using listdir(), the problem still persists:


  callToRemoteApplicationToCreateFile('file1')
  os.listdir('/my/imported/directory')
  f = file('/my/imported/directory/file1')

--> "No such file or directory"


An "ls /my/imported/directory" shows the file. Are you sure, that
opendir() causes the cache refresh? If yes, the problem must be
on the Python-side, so I have to look there...

thanks and regards
-stefan-


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