Re: How to Disable Network Redirector File Caching in- win2000?

NTFSD
1

Oplocks only apply to the SERVER side of the connection, not the CLIENT side
of the connection (that is, oplocks are sent from SRV - the CIFS/SMB server

  • to the file system. There’s no visibility into these in a filter sitting
    on top of the redirector.)

Regards,

Tony

Tony Mason
Consulting Partner
OSR Open Systems Resources, Inc.
http://www.osr.com

-----Original Message-----
From: Peter Yao [mailto:xxxxx@hotmail.com]
Sent: Tuesday, November 20, 2001 6:22 PM
To: File Systems Developers
Subject: [ntfsd] Re: How to Disable Network Redirector File Caching in
win2000?

If you don’t apply oplocks on files, they wouldn’t be cached.

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2

Tony,sorry for my poor english.Below is my understand:
If the CIFS/SMB CLIENT does not demand any oplock when opening a file
across network,the RDBSS (Redirector buffered sub-system) will not cache
any data. It can’t be sure that the data is fresh,since the file is on
SERVER side and any other clients may change it at any time.

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3

No, oplocks are the notion of RDR->SRV interaction and of SRV->server FS interaction, but surely not a notion of app->RDR
interaction.

NT’s filesystem APIs have no oplock support.

Max

----- Original Message -----
From: “Peter Yao”
To: “File Systems Developers”
Sent: Wednesday, November 21, 2001 11:28 PM
Subject: [ntfsd] Re: How to Disable Network Redirector File Caching in- win2000?

> Tony,sorry for my poor english.Below is my understand:
> If the CIFS/SMB CLIENT does not demand any oplock when opening a file
> across network,the RDBSS (Redirector buffered sub-system) will not cache
> any data. It can’t be sure that the data is fresh,since the file is on
> SERVER side and any other clients may change it at any time.
>
> —
> You are currently subscribed to ntfsd as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to leave-ntfsd-$subst(‘Recip.MemberIDChar’)@lists.osr.com
>

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