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<== Date ==> <== Thread ==>

Subject: Re: JCA problems and questions
From: Matej Sekoranja <matej.sekoranja@cosylab.com>
To: tech-talk@aps.anl.gov
Date: Tue, 23 Oct 2012 22:33:26 +0200
Hi,

Rok Sabjan notified me about this thread. Thanks to Lewis for replies.

The old send buffer algorithm was to initialize the send buffer size to max_array_bytes and
automatically resize on demand (there is one send buffer per TCP connection). Not something
one would dare to use on a server, however very convenient on the client side.

However, if a client has a lot of connections there is a lot of memory required when max_array_bytes is large (e.g. 100 connection * 10MB = 1GB!).
Current algorithm starts with an initial size of 1k that can be automatically resized up to max_array_bytes.
This also mimics C++ CA algorithm (that has also evolved over the years).

Cheers,
Matej

Replies:
RE: JCA problems and questions Mark Rivers
RE: JCA problems and questions Hu, Yong

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