Lars Hofhansl created HBASE-11351:
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Summary: Experiments with OffHeap memstores
Key: HBASE-11351
URL: https://issues.apache.org/jira/browse/HBASE-11351
Project: HBase
Issue Type: Bug
Reporter: Lars Hofhansl
I have been experimenting with offheap memstores using an offheap BTree
implementation of ConcurrentMap provided by MapDB (www.mapdb.org)
So far I hooked this up in an experimental way with inefficient serialization
(in the sense that due to our special usage of the set api we need to back the
set by a map, which in the off heap case means we need to serialize and store
the value twice. It is used as key and value). But it works.
It's quite a bit slower and due to need to deserialize upon scan it produces
*more* short term garbage.
Let's use this issue to discuss.
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