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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "Hbase/HBaseWireCompatibility" by JimmyXiang
Date Mon, 13 Feb 2012 22:19:02 GMT
Dear Wiki user,

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

The "Hbase/HBaseWireCompatibility" page has been changed by JimmyXiang:

  Currently, the HBase RPC engine does not support async IO or protocol  negotiation.  These
features don't impact compatibility and therefore  can evolve separately and are not in scope
for this document.
  ==== Interfaces ====
- {{https://wiki.cloudera.com/download/temp/graphviz8261645797990359928.png?contentType=image/png&delete=true}}
+ {{attachment:graphviz9029614125979649556.png}}
   1. Client talks to ZK to find out the location of the master and the root region server.
   1. Client applications talk to RS using '''HRegionInterface''' to read from/write to/scan
a table, etc..
@@ -74, +74 @@

   . To make HBase client applications work properly with HBase clusters of different major
and minor versions.
  Note: deal with 1, 2, 3 (we get 8 "for free") in the interface graph.
+ These tasks can be sub-tasks of HBASE-5305 or HBASE-5306.  HBASE-5306 can also include a
new RPC engine (the latest Hadoop one). This plan focuses on the data encoding/decoding.
@@ -134, +135 @@

   . Dapper: http://research.google.com/pubs/pub36356.html
   . Cross version upgrade and compatibility: https://issues.apache.org/jira/browse/HBASE-5305
+  . Add protbuf based RPC to HBase: https://issues.apache.org/jira/browse/HBASE-5306
   . Redo IPC/RPC: https://issues.apache.org/jira/browse/HBASE-2182
   . HDFS wire compatibility: [[https://issues.apache.org/jira/browse/HADOOP-7347|HADOOP-7347]]
   . HDFS client wire compatibility: [[https://issues.apache.org/jira/browse/HDFS-2060|HDFS-2060]]

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