TreapDB 2.0 RC1 版发布

TreapDB 是一个基于 Treap 算法（一种随机二叉搜索树）开发的 Key/Value 数据存储的数据库。兼容 memcached 协议。

 

TreapDB 2.0 RC1改进内容：

• 新增操作："bulkPrefix", "removePrefix"（批量按前缀索取，按前缀删除）
• 删除的节点的磁盘空间可以复用
• 体积大的Value用QuickLZ算法压缩后存储
• 新的操作: "optimize"，可以将顶层节点置换到内存映射区域（当内存比索引文件小时有用）
• 操作"prefix"可以自定义排序是正序还是倒序
• 一个分页的bug被修复
• 一个批量写的bug被修复
• 更易使用的python客户端

项目地址：http://code.google.com/p/treapdb/

JavaEye相关报道：http://www.iteye.com/news/18820-treapdb

 

Version2.0 RC1

• new operations: "bulkPrefix", "removePrefix"
• the space of deleted nodes can be reused
• huge values are compressed with QuickLZ
• new operation: "optimize", which can swap top-level nodes to memory-map region
• "prefix" has new parameter to specify pairs' order
• a paging bug fixed.
• a bug of "bulkPut" fixed.
• a more easy to use python-client
• 2010-12-23

Version2.0 Beta2

• support bulk operations: bulkPut and bulkGet (pretty fast)
• value less than 4Bytes(e.g. Integer) has a copy in index file, no file seek needed.

(therefore, the performance of "prefix","range",etc. is improved very much)

• a bug in x64 architecture fixed.
• 2010-12-12

Version2.0 Beta1

• master-slave replication supported.
• unit test added
• a client shell to learn TerapDB easily.
• two new operations: "before" & "after"
• the performance of these operations improved: "kmin","kmax","range","prefix".
• many thanks to Ma Qiang
• 2010-12-10

Version2.0 Alpha1

• merge two servers to one TreapDB server, which can talk both thrfit and memcache at the same time.
• use XML to configure server parameters
• memcache server performance improved 30%
• DiskTreap? performance improved 12%
• Note, the data format changed to support memcache flag, therefore, data generated by early version can not be used
• 2010-12-8

Version1.1 RC

• more API operations added,such as: "remove"(remove a item by key);"length"
• improve concurrent reading peformance
• 2010-12-4

Version 1.0

• 2010-12-1