Did anybody solve this?

Re:Did anybody solve this? by a3_nm on Friday December 23, 2011 @03:25PM (#3387109)

I did read the problem statement, but I thought tee was writing to all files in parallel. It's surprising that there seems to be no way to achieve that.

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Re:Did anybody solve this? by dexen on Friday December 23, 2011 @03:38PM (#3387156)

Tee writes in one-thread-per-file level of parallelism; simple experiment:

  $ tee foo.bin bar.bin baz.bin < /dev/zero

writes to all three files `at once' (in small time-slices, actually). Used GNU tee from coreutils-8.10.

Perhaps OP meant several-threads-per-file level of parallelism, where number_threads > number_files?

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Re:Did anybody solve this? by mvgoogler on Sunday December 25, 2011 @07:27PM (#3391906)

tee has a simple main loop:

  while not EOF: 
    (synchrounously) read up to BUFSIZE bytes from stdin into buf 
    for each output file: 
      (synchrounously) write buf to file

(source code here: http://git.savannah.gnu.org/cgit/coreutils.git/tree/src/tee....)

All of the reads and writes are done through synchronous file apis. I don't see where you are getting one-thread-per-file (or any other kind of parallelism) there.

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