[OpenAFS] memcache option for Windows client

[Michael Loftis]

No reason it can't be done...just skip the part that locks in the backing 
file in the win32 API code....It's too early to remember the actual code 
but if there's a lot of interest i could likely submit a patch to whomever 
would need accept it in fairly short order.

--On Sunday, November 16, 2003 19:39 -0500 Rob Murawski 
<rsm4@cssd.pitt.edu> wrote:

>
> Since the memory-mapped file is addressed as if it were memory, it should
> be fairly easy to change the startup code to malloc an appropriate amount
> of memory instead of creating the memory-mapped file.  I would presume no
> one has had the need to do this before.
>
> -Rob
>
>
> ----- Original Message -----
> From: Christopher D. Clausen
> To: openafs-info@openafs.org
> Sent: Sunday, November 16, 2003 7:31 PM
> Subject: Re: [OpenAFS] memcache option for Windows client
>
>
> Rob Murawski <rsm4@cssd.pitt.edu> wrote:
>> An in-memory cache option doesn't make sense for the Windows client.
>> It uses a memory mapped file for the cache.  This means that, if
>> sufficient memory exists, it is in memory.  It basically works like
>> virtual memory where it will be mapped back to the disk when needed,
>> but is addressable like memory.
>>
>> Do you have a need that the cache ONLY be in memory?
>
> Actually, yes.
>
> I have some clients with largish amounts of RAM, low disk space, and
> slow disks.  It would be nice to avoid disk writes, as it significantly
> reduces performance.  And the cache size would not be dependant on the
> amount of free disk space on the machine, but only the RAM.
>
> Perhaps it might be time to buy some larger, faster disks.
>
> I was also attempting to create a disk-less Windows client using Windows
> XP embedded, where disk access would complicate matters (although I have
> not gotten far yet.)
>
> <<CDC
> Christopher D. Clausen
> ACM@UIUC SysAdmin
>
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