[erlang-questions] Erlang in Amazon AWS cloud

[dokondr]

Hi,
Recently I was requested to move my application to Amazon AWS. My app is
written in Haskell and I find it a little bit difficult to scale Haskell
app naturally in AWS. So I started thinking about rewriting my app in
Erlang as it provides natural environment for concurrent applications.
I don't have much experience with Erlang and will be happy to get advise on
what Erlang systems AWS will be able to scale efficiently. There are
several main things I need:
1) A persistent key-value store. I am thinking about using Mnesia or Amazon
SimpleDB.  I would prefer Mnesia, as I want to be able to run my app also
locally, without live connection to AWS. Yet I don't know how to run Mnesia
in AWS in efficient, scalable way.
2) My app today consists of several standalone processes that communicate
by means of simple files. I move from files to key-value store, but would
like to preserve independent processes communicating with each other. What
is a natural Erlang way to do this? How this natural way will be able to
scale in AWS?
3) My app works with blog messages and does some NLP and a lot of text
processing, also works with JSON. As I understand, processing text in
Erlang is a bit tough. What Erlang libraries can help here - string
tokenizers, JSON libs, etc.?
4) What libraries Erlang has to serialize data structures in/from files
(need this for debugging mostly, anything similar to Python pickling)?

Thanks!
Dmitri
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