Re: concurrent DBM for Java?

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 01 Apr 2010 15:38:29 -0400

Message-ID:

<4bb4f636$0$274$14726298@news.sunsite.dk>

On 01-04-2010 15:11, Jim Janney wrote:

I need to maintain a data base of small text snippets keyed by
arbitrary strings, without the overhead of a full SQL relational
database. We will have several people putting data into it so it
needs to support concurrent access over a network.

JDBM catches my eye (http://jdbm.sourceforge.net/) but I can't find
any place that says whether it supports concurrent access or not.
Berkeley DB would be perfect but would need a license from Oracle
since this is a commercial product. Gdbm apparently does not support
concurrent access. TDB (http://sourceforge.net/projects/tdb/) looks
good but would require a JNI interface and probably some work to get
it to compile under Windows.

Any recommendations? I can do JNI if neccessary but would be just as
happy not to need to. I need something I can get going quickly --
management wants it yesterday, as usual...

Why are you so sure that a full SQL relational database has
too much overhead?

They work. They are widely used. They are optimized a lot.
They support ACID.

Chosing some rarely used ISAM package, that may have
concurrency problems & other bugs and may not even be optimized
very well seems as a high risk for little gain to me.

Sure Google, Yahoo, Facebook etc. uses NOSQL databases
today. But they can also afford to spend 2 digit millions
of dollars on the development without blinking. Can you?

Arne