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by curtisblaine 898 days ago
They might just want cheap disk persistence. I'm not a Java developer, but if SortedMaps are a memory-only data structure, persisting them reliably doesn't look an easy feat.
1 comments
morelisp 898 days ago
RocksDB is disk persistence but it sure ain't (for this scale) cheap.

Persisting just about anything in Java is easier than persisting it in Java in RocksDB.

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curtisblaine 897 days ago
How would you persist a Sorted Map in Java easily? Serializing and deserializing is OK, but keep in mind that if the program crashes you still need to persist all the data that was saved before the crash (so you can't keep in memory and serialize at exit, or at a time interval)
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morelisp 897 days ago
Given the size of any dataset of the type being discussed here, you dump the whole thing to disk on every change.
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