[OpenAFS] Cache size for Windows Client

Jeffrey Altman jaltman@secure-endpoints.com
Wed, 14 Nov 2012 16:34:50 -0500

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Have you read the Release Notes?    There is a copy installed on the=20
local machine

  Start->Programs->OpenAFS->Documentation->Release Notes

and a copy on the web at


The maximum cache size on Windows is determined by the largest
contiguous block of virtual address space that can be used to
memory map the AFSCache file.  On 32-bit Windows this value
will be something under 1.2GB.  It all depends on what third
party software is installed.  On 64-bit Windows this value is
effectively unlimited.

You might also want to read blog.secure-endpoints.com.

Jeffrey Altman

On Wednesday, November 14, 2012 4:24:19 PM, Harry I Linzer wrote:
> I am using OpenAFS For Windows 1.7.x on a computer that has an excess
> of disk space.
> From past experience with Linux, bigger cache generally equals better
> AFS performance
> for the type of work I do.   On some of our larger multiuser Linux
> servers, we have the size
> set to 16G and it works just fine.
> I have tried setting the cache to a rather large size and noticed that
> the AFS Client code
> will not start until I reduce the size.
> Can someone tell me what the maximum supported cache size for the
> Windows OpenAFS
> Client.
> Harry
> --------
> Harry Linzer - Senior Technical Staff Member
> Dept 0TAV/Bldg 062/Room G207
> 3039 Cornwallis Road
> Research Triangle Park, NC 27709
> Phone (Office): +1-919-486-3045 (8-526) /  (Cell): +1-919-247-9361
> EMail: _linzer@us.ibm.com_ <mailto:linzer@us.ibm.com>

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