[erlang-questions] upgrading erlang servers
Fri Feb 11 02:54:33 CET 2011
On 10/02/2011, at 6:06 PM, Param Jyothi Reddy wrote:
> Hi guys,
> I am new to erlang and was reading "Programming Erlang" by Joe
> Armstrong and one remark in the book surprised me.
> Pg 173: "And same version of erlang [on all nodes]. If you dont do
> this, you'll get serious and mysterious errors.".
There's one possible reason for this.
When you send terms from processes on one node to processes on another,
they are sent in a binary format. This format has changed from time to
time, and could certainly be improved further. See the "minor_version"
option in the documentation for erlang:term_to_binary/2.
Since mnesia/ets data also use this format, it's not something anyone
wants to change _often_.
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