Hi Johannes,
right, but in case you have 200 boxes and each box need to open 4
different connections to the master.
Than the master has 200 * 4 connections = 800 threads = the limit of
the 2.4 kernel.
In case you open only one conenction per box you are also limited to
run 800 boxes per master.
Since map reduce is focused to have thousands of boxes involved this
would be a limitation. (google has actually more than 150.000 :-O
boxes I had read in a interesting book)
Stefan
Am 12.11.2005 um 19:42 schrieb Johannes Zillmann:
Hello Doug,
--- Doug Cutting <[EMAIL PROTECTED]> schrieb:
Mina's stream io
handler requires a separate thread per connection:
please correct me if i'm wrong, but if i understood
all right there are 2 choices...
(1) message based communication
(2) stream based communication
In case of (2) you won't come along without one thread
per connection.
Cite "read the input and write to its pipe" from
you're initial descrition of further progress...
Either writing data to the pipe will also immidiately
handle the data (->(1)) or a thread is waiting on the
other side of pipe an reading/handling all incomming
data (->(2)).
best regards
Johannes
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