[OpenAFS] File/data transfer

[Jeffrey Altman]

This is a cryptographically signed message in MIME format.

--------------ms030206070308050105050700
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit

Lundgren, Andrew wrote:
> I am working on setting up my first cell and have a few more questions
> about what to expect.
>  
> When a client requests a file that is not stored locally in the cache,
> does the FS pull the full file before allowing access to it, or does it
> pull a requested block?

It retrieves the requested block.  The OAFW cache manager will look at
the CreateFile hints to determine what if any prefetching should be
performed on additional chunks.

> If the file requested is multiple gigs does the call to open block until
> the full file is retrieved from the server?

No.  Only requested chunks and those pre-fetched are retrieved when the
data is actually read.

Jeffrey Altman

--------------ms030206070308050105050700
Content-Type: application/x-pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7s"
Content-Description: S/MIME Cryptographic Signature
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--------------ms030206070308050105050700--