From: Kyle Schmitt <kyleaschmitt@...>
Date: 2008-05-10T06:22:32+09:00
Subject: Persistent Hash

I'm looking for some sort of persistent hash, or object store for ruby.

I just need some advice about what works well & doesn't, so I don't
attempt to *re-invent the wheel.

I'd be using it for a some small client-server apps, maybe web front
end, maybe not, but either way, I'm guessing multiple processes will
want to access the data simultaneously.

The options I've come up with are
1 DBM/SDBM + YAML
2 PStore
3 Marshall
4 ActiveRecord


1 I really didn't see much in the way of DBM/SDBM documentation, but
may be I was looking in the wrong places.  All the same, I can see
pretty easily how I could do something like a persistent hash by
combining yaml and DBM, but it does make me wonder, has anyone already
done something like that?

2 PStore seems a little clunky, but rather effective: How is it with
medium sized data sets (hashes of a few thousand elements)?  How is
over the longer term, data resiliency wise?

3 Marshalling and un-marshalling I know will work, but at the same
time it seems... well a bit prosaic.

4 ActiveRecord I know will work, and I've played with before, but I
really don't like how it forces you to hammer your data structure into
it's mold.


*yes re-inventing the wheel is a time honored and important past-time
for programmers.  It's fun, it teaches you things, but when you really
want to work on another part of a project, you have to force yourself
not to.