[erlang-questions] Which distributed key-value storage do you use?

[Ulf Wiger]

If you are using disc_copies, I think that thousands of
writes/sec is attainable.

Personally, I think that disc_only copies seldom have a
place nowadays, since they are limited to 2 GB, and
64-bit Erlang allows you to go way beyond that limit with
disc_copies and good performance.

There are some things to think about when going to 64 bit.
The main rule of thumb is that the initial switch will
nearly double the memory usage, unless you are using
binaries heavily. After that, you can just keep growing.

I once tested disc_copies up to about 13 GB on a 16 GB
machine. Performance was excellent.

http://erlang.org/pipermail/erlang-questions/2005-November/017728.html

BR,
Ulf W

Sergey Samokhin wrote:
> Hello.
> 
>> Lots of unknown sentiment in that paragraph. Why are you looking for an
>> alternative technology if you don't even know that your current one is
>> insufficient?
> 
> Don't get me wrong: I have already done some measurements and found
> mnesia *quite efficient* for the near future. What I'm trying to find
> out by posting messages here are other possible "routes to escape" if
> things go wrong with mnesia (ok, I may be too prudent).
> 
> It's always a good idea to take into account more than one way to
> solve a problem. The more ways to solve a problem you have, the better
> one you end up with will be.
> 
> So, I've decided to ask what other dbs people here are using =) Soon
> I'm going make a list of document oriented and Key-Value db with
> bindings for Erlang and post it in this thread.
> 


-- 
Ulf Wiger
CTO, Erlang Training & Consulting Ltd
http://www.erlang-consulting.com