Sheldon Hearn <sheldonh at starjuice.net> writes:
> Is there anything I can do to the Slony configuration (or source) to
> reduce this chattiness?  I could afford as much as a 1 minute delay in
> updates.

1.  Increase the intervals for SYNC check, and the maximum size of a SYNC
    group.

    See the -g and -s options to slon.

2.  You might consider using an SSL tunnel.

    Preferably you'd want to use some low cost crypto algorithm, like
    Blowfish or Twofish, so that aspect isn't too expensive.  

    In this case, 3-DES == "BAD".  :-)

    Compression, which is the other part of it, will be the big win.

One of the things planned for version 1.1 is the ability to generate
the sets of updates in file form, so that they could be spooled to
disk, and then applied at leisure.  That would outright eliminate all
of the "chattiness" involved in nodes communicating with one another.
You might FTP the files over, as needed.  No NOTIFY events involved.
-- 
"cbbrowne","@","ca.afilias.info"
<http://dev6.int.libertyrms.com/>
Christopher Browne
(416) 673-4124 (land)