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Re: [nfsv4] NFSv4.2: Optional attribute to retrieve MS branchcachecontent description

Trond Myklebust <trond.myklebust@fys.uio.no> Fri, 21 August 2009 11:37 UTC

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From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: "Govind, Subin" <Subin.Govind@netapp.com>
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Cc: "Erasani, Pranoop" <Pranoop.Erasani@netapp.com>, nfsv4@ietf.org
Subject: Re: [nfsv4] NFSv4.2: Optional attribute to retrieve MS branchcachecontent description
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On Fri, 2009-08-21 at 08:23 +0530, Govind, Subin wrote:
> Pranoop,
>  
> At a very high level --
>  
> Its basically a collection of hashes and encryption keys. The hashes
> are uses to test for integrity of data that a client can fetch
> from its peer.
>  
> Data is broken up into chunks of 32 MB and each chunk is searched
> using a key that can be computed from the hashes in the content
> decription.
>  
> The encryption key used to decrypt the data that the client gets from
> other peers on its network.
>  
> Please refer to http://msdn.microsoft.com/en-us/library/dd303704%
> 28PROT.10%29.aspx for detailed info.
>  
> Thanks
> Subin
>  
>  
>  
> 
> 
> ______________________________________________________________________
> From: Erasani, Pranoop 
> Sent: Friday, August 21, 2009 1:22 AM
> To: Govind, Subin; nfsv4@ietf.org
> Subject: RE: [nfsv4] NFSv4.2: Optional attribute to retrieve MS
> branchcachecontent description
> 
> 
> 
> Subin,
>  
> What information would be part of the branch cache file content
> description?
>  
> - Pranoop
> 
>         
>         ______________________________________________________________
>         From: Govind, Subin 
>         Sent: Thursday, August 20, 2009 9:47 AM
>         To: nfsv4@ietf.org
>         Subject: [nfsv4] NFSv4.2: Optional attribute to retrieve MS
>         branchcachecontent description
>         
>         
>         
>         Hi,
>          
>         We should have an optional attribute that will help NFS
>         clients retrieve the Microsoft branch cache file content
>         decription. I propose this as a possible item for NFS 4.2.
>          
>         Using the decription, NFS clients will be able to open a file
>         and request other openers (possibly CIFS) who have same file
>         cached.
>         Content servers that have both CIFS and NFS will benefit most
>         from this     
>          
>         -Subin

Peer-to-peer nfs has already been proposed for the NFSv4.2 agenda, but
the plan was to reuse the pnfs mechanism. See

http://tools.ietf.org/id/draft-myklebust-nfsv4-pnfs-backend-protocol-00.txt

Trond

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