On Friday, March 23, 2007 10:30:42 AM -0400 Jeffrey Altman
<[EMAIL PROTECTED]> wrote:
Robbie Foust wrote:
Hi,
Has anyone ever set up a Windows Media Server to point to content in AFS
using the windows client? Just wondering how well that would work or
how reliable it would be. I know the windows client is *much* more
stable now than it has been in the past. Our other option is to connect
the servers to a san (which we already have).
The question is how much bandwidth do you require and how large a cache?
The 32-bit Windows client is limited to about 1GB of cache. For a media
server you probably want a much larger cache. The 64-bit Windows client
can support much much larger caches provided you have enough RAM on the
machine. I've tested with a 12GB cache on a machine with 1GB of RAM.
I know there are problems at 20GB on a 1GB machine because the swapping
is too great. However, a 60GB cache on a machine with 8GB RAM should
work quite nicely.
Actually, cache size is probably not as much an issue here as you might
think. What is interesting is
(1) how fast you intend to send data to clients, and
(2) how much pre-buffering you're doing as compared to the AFS chunk size.
When you read a chunk that is not cached, you will have to wait for the
entire chunk to be received from the fileserver before you will get to do
any processing on it. In addition, AFS does not do any sort of automatic
read-ahead, so cold-cache reads will be rather bursty, requiring more
pre-buffering and/or extra effort to achieve a continuous transfer.
-- Jeff
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