You are viewing a plain text version of this content. The canonical link for it is here.

Posted to commits@cassandra.apache.org by Apache Wiki <wi...@apache.org> on 2010/03/29 11:20:45 UTC

[Cassandra Wiki] Trivial Update of "CassandraHardware_ZH" by TigerF

Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Cassandra Wiki" for change notification.

The "CassandraHardware_ZH" page has been changed by TigerF.
http://wiki.apache.org/cassandra/CassandraHardware_ZH?action=diff&rev1=1&rev2=2

--------------------------------------------------

  
  最近写入的数据总是先写入内存表(aka memtable) , 但是旧的数据会被刷新到磁盘，被保存在操作系统的文件系统缓存。换句话说，内存嘛，韩信点兵多多益善，建议最少有1G的虚拟内存。可以观察到性能的改善依赖于你的比较常用的数据集(hot data set),但是硬件通常需要4GB，在高端应用中，比如你看到的集群，通常每个节点会带着16GB到32GB乃至更多。
  
- 内存也被用来做键(输入在0.5)和列的缓冲(在0.6)?
+ 内存也被用来做键缓冲(0.5版本引入)和行的缓冲(0.6版本)。
  
  
  CPU