我计划在BerkeleyDB JE数据库中插入大量唯一键(〜3E9).

键的长度是固定的(〜10个字节),但是值的长度是可变的.该数据库将不是事务性的.

您对EnvironmentConfig和DatabaseConfig建议什么参数来优化数据库的大小和速度？

非常感谢,

皮埃尔

解决方法:

好的,我使用打包到berkeleyDB-JE中的实用程序com.sleepycat.je.util.DbCacheSize找到了解决方案

java -cp je-4.0.103.jar com.sleepycat.je.util.DbCacheSize -records 3000000000 -key 8
Inputs: records=3000000000 keySize=8 dataSize=-1 nodeMax=128 binMax=128 density=80% overhead=10%

=== Cache Sizing Summary ===

   Cache Size       Btree Size    Description
---------------  ---------------  -----------
206,574,616,257  185,917,154,632  Minimum, internal nodes only
231,821,163,884  208,639,047,496  Maximum, internal nodes only

To get leaf node sizing specify -data

=== Memory Usage by Btree Level ===

 Minimum Bytes    Maximum Bytes      Nodes    Level
---------------  ---------------  ----------  -----
184,101,562,500  206,601,562,500  29,296,875    1
  1,797,864,968    2,017,591,304     286,102    2
     17,551,212       19,696,236       2,793    3
        169,668          190,404          27    4
          6,284            7,052           1    5