Hi Luke,

The short answer is yes, when the file is created on the home, it is a
'brand new' creation that will conform to any and all new placement
policies that you set on the home site.  So if you are using NFS in the
relationship, then it is simply created just like any other file is created
over NFS.  The same goes when using GPFS to the home cluster...

Dean
IBM Almaden Research Center




From:   Luke Raimbach <[email protected]>
To:     gpfsug main discussion list <[email protected]>
Date:   02/24/2016 06:05 AM
Subject:        [gpfsug-discuss] AFM and Placement Policies
Sent by:        [email protected]



Hi All,

I have two GPFS file systems (A and B) and an AFM Single Writer
relationship: /fsB/cache writes back to /fsA/home

I have a placement policy which sets extended attributes on file creation
in /fsB/cache.

When I create a new file in /fsB/cache/new.file and it is pushed back by
AFM to /fsA/home/new.file, can the home fileset apply a different placement
policy to add or modify extended attributes? I guess the deeper question is
does each file system in this arrangement see the new.file as "new" in both
locations?

Cheers,
Luke.

Luke Raimbach​
Senior HPC Data and Storage Systems Engineer,
The Francis Crick Institute,
Gibbs Building,
215 Euston Road,
London NW1 2BE.

E: [email protected]
W: www.crick.ac.uk

The Francis Crick Institute Limited is a registered charity in England and
Wales no. 1140062 and a company registered in England and Wales no.
06885462, with its registered office at 215 Euston Road, London NW1 2BE.
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