Open Source Off Heap ConcurrentNavigableMap/ConcurrentSkipListMap

[Mark Anderson]

Are there any open source off heap ConcurrentNavigableMap/ConcurrentSkipListMap implementations?

Thanks,
Mark

[Andy Smith]

Does Pete Lawrey's map implementation work for you? 

Google Chronicle / OpenHFT,,.

Cheers,

A.

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[Thomas Darimont]

Hi,

You could have a look into Rocksdb https://github.com/facebook/rocksdb

It does provide neither a CNM nor a CSLM like implementation directly but stores data on-disk in sorted order and has support for using skip-lists internally. So it might be close to what you want.

Btw. Rocksdb is also used by Apache Samza.

Cheers,
Thomas

[Mark Anderson]

I know of openhft. I think from the javadoc it isn't a navigable map but that isn't to say it wouldn't be useful.

I'll have a look at rocksdb. Though ideally I'm looking for a drop in that implements the JDK interface.

For now I'm not sure it is something I will definitely need but I would like to at least know what the options might be.

Thanks.

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[Scott Carey]

MapDB has a SortedMap implementation (HTreeMap) that can be off-heap.  It supports concurrent access and transactions, if necessary.  Its what I use, after a frustrating attempt at using ChronicleDB.   Although, I wrapped everything in my own API layer so I can swap out implementations if needed later -- and have multiple working implementations but only one in production.

[milan...@it-jazz.com]

Hi Scott, i see that you had chance to give a try to ChronicleDB. I read about it in many papers but havnt had chance to find website and dowload or what ever to try if it fits my case. Could you please point me to website where I can download it and give it a try?

Thank you