close Warning: Can't synchronize with repository "(default)" (Unsupported version control system "svn": libsvn_diff-1.so.1: failed to map segment from shared object: Cannot allocate memory). Look in the Trac log for more information.

Changes between Version 7 and Version 8 of jazz/10-04-24


Ignore:
Timestamp:
Apr 24, 2010, 11:59:24 AM (16 years ago)
Author:
jazz
Comment:

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  • jazz/10-04-24

    v7 v8  
    55 * 09:00–09:50 nosql cassandra - Gasol (Pixnet)
    66   * http://cassandra.apache.org/
    7    * 具備副本機制，優先存在記憶體中，後續寫入 commit log 中。採取完全平等的分散式架構，沒有 Hadoop NameNode 單點失效問題(Single Point of Failure)
     7   * 具備副本機制，優先存在記憶體中，後續寫入 commit log 中。採取完全平等的分散式架構，沒有 Hadoop !NameNode 單點失效問題(Single Point of Failure)
    88   * [http://en.wikipedia.org/wiki/CAP_theorem CAP theorem] - Consistency(一致性), Availibility(可用性),Partition Tolerance(容錯性)三個勢必要犧牲其中一個！！
    99   * [[Image(hbase_cassandra_hypertable.png,width=600)]]