[Twisted-Python] Need words of wisdom regarding PB

Chaz. eprparadocs at gmail.com
Wed Jun 28 08:03:57 EDT 2006


 Thanks for the information. I hadn't thought about multiple pb
connections, but I might even for my low-latency environment. I can have
files that range from very small to very very large and getting them
transferred in a reasonable period of time might might require many
connections at once.

 In your solution did you just allow the client to "divide" up the work
or was there something else you did?


Paul G wrote:
> ----- Original Message ----- From: "Chaz." <eprparadocs at gmail.com>
> To: "Twisted general discussion" <twisted-python at twistedmatrix.com>
> Sent: Sunday, June 25, 2006 2:20 PM
> Subject: [Twisted-Python] Need words of wisdom regarding PB
>> I have a problem to solve: I need to get files from one machine to
>> another. I had thought about all the obvious solutions (and implemented
>> some of them); for instance adding an FTP server to my Twisted services
>> and using a client. I thought about doing the file transfer with XML-RPC
>> and even SOAP. And I even thought of WebDav.
>> I started reading about PB and thought it might be useful. I thought
>> about building a "remote" class that simulates open and all its
>> functions, like read, write, close, etc.
>> The more I thought about it the more I thought it cool and the way to do
>> it. That got me thinking that I must be missing something. I am curious
>> about what you might think of this approach. Is there another better way?
> i implemented file transfer with an optional intermediate gzip stage
> using pb a long while ago. if you're dealing with fairly low latency, a
> single pb connection is fine; for higher latencies, you'll want to
> multiplex multiple pb connections (this has to do with tcp, not pb).
> with my quick hack, i was able to saturate a fast-e with virtually no
> significant cpu utilization - the disk io and the network were the
> bottlenecks.
> -p

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