[OpenAFS-devel] Hierarchical caching support in AFS?

[Neulinger, Nathan]

Interesting result... I would tend to think it would make a large difference
though if you have remote clients. Being able to set up a remote "caching
only" fileserver, with a huge cache, would have to help unless your clients
caches exceeded their data set size.

-- Nathan

> -----Original Message-----
> From: Jim Rees [mailto:rees@umich.edu]
> Sent: Monday, April 09, 2001 12:31 PM
> To: openafs-devel@openafs.org
> Subject: Re: [OpenAFS-devel] Hierarchical caching support in AFS? 
> 
> 
>   I am wondering if it is possible at all with
>   the openafs-1.0.3 to get hierarchical caching whereby an 
> "edge" cache
>   manager upon request for a file from an application that 
> runs on the "edge"
>   box pulls data from an "intermediate" cache manager or an 
> "intermediate"
>   fileserver...
> 
> We tried this once and concluded that in most cases it 
> doesn't help, because
> the client caches already skim off any cacheable data, 
> leaving nothing for
> the intermediate.  We published a couple of tech reports that might be
> useful:
> 
> http://www.citi.umich.edu/techreports/
> 
> D.A. Muntz, P. Honeyman, and C.J. Antonelli, "Evaluating 
> Delayed Write in a
> Multilevel Caching File System," October 1995. [Proc. 2nd 
> Intl. Conf. on
> Dist. Platforms, pp. 415-429, Dresden (February 1996).]
> 
> J. Howe, "Intermediate File Servers in a Distributed File System
> Environment," June 1992.
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