New BabuDB Release 0.5.6

[Jan Stender]

Hi Folks,

A new release of BabuDB for Java is now available. BabuDB 0.5.6 comes
with the following changes:

BabuDB:
-------
* fixed bug that caused an infinite blocking of external threads on
full insertion queues

* fixed bug that could cause an IllegalMonitorStateException to be
raised when creating a checkpoint while manually shutting down a database

Replication Plug-in:
--------------------
* enhanced log-output for time-drift detection, such that the
relevant participants are shown

Best regards,
Jan

[BohuTANG]

Hi,
I implemented a LSM-Tree storage engine,the codes are here:
https://github.com/shuttler/lsmtree
and benchmark results as follow:
BENCHMARK
=========
Keys: 16 bytes each
Values: 20 bytes each
Entries: 3000000
IndexSize: 71.5 MB (estimated)
DataSize: 68.7 MB (estimated)
---------------------------------------------------------------------------------------------------
LSM-Tree: version 0.1(LSM-Tree storage engine)
Date: Tue Dec 13 17:27:58 2011
CPU: 2 * Intel(R) Pentium(R) Dual CPU T3200 @ 2.00GHz
CPUCache: 1024 KB

+-----------------------------+----------------
+------------------------------+-------------------+
|Random-Write (done:3000000): 0.000013 sec/op; 76923.1 writes/
sec(estimated); cost:39.000(sec)
+-----------------------------+----------------
+------------------------------+-------------------+
|Random-Read (done:100000): 0.000030 sec/op; 33333.3 reads /
sec(estimated); cost:3.000(sec)
+-----------------------------+----------------
+------------------------------+-------------------+