Re: what's better way to store a million keys in mem?


I'd give a real database a try for this. There is of course a bit of
overhead, but you use a lot less memory and I guess it will also be
faster. Of course, you should benchmark and compare any solutions
suggested.

I also think that you should use a database. You can use a ORM (Object-Relation Mapping) like the javax.persistence API of JEE5 or hibernate directly, for example.
.

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