https://github.com/killme2008/ewok

A high available BTM transaction logs journal using bookkeeper.
https://github.com/killme2008/ewok

Last synced: 3 months ago
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A high available BTM transaction logs journal using bookkeeper.

• Host: GitHub
• URL: https://github.com/killme2008/ewok
• Owner: killme2008
• Created: 2011-11-30T04:05:47.000Z (over 14 years ago)
• Default Branch: master
• Last Pushed: 2014-09-23T10:01:25.000Z (almost 12 years ago)
• Last Synced: 2025-03-23T20:43:46.856Z (over 1 year ago)
• Language: Java
• Homepage:
• Size: 174 KB
• Stars: 10
• Watchers: 4
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: licenses.txt

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README

          
# Introduction

A  high available BTM transaction logs journal using bookkeeper.

It's still under heavy development.

BTM: http://docs.codehaus.org/display/BTM/Home

BookKeeper:  http://zookeeper.apache.org/bookkeeper/svn.html

# License

BTM is LGPL license based,so is ewok.

#Internal

Ewok use zookeeper to store every TransactionManager's ledger id:

	 /ewok

		/app1

				/192-168-1-100 -- 0		[ledger id]

					 /ownership	            [Ephemeral node]

				/192-168-1-101 -- 1

				  	 /ownership

		/app2

				/192-168-1-135 -- 99

				/192-168-1-136 -- 100

					/ownership

				......

And ewok use bookkeeper to write transaction logs,it writes a TransactionLogRecord as an entry to ledger.If it write failed,it just create a new ledger and copy all dangling transactions to the new ledger.

#Configuration

Ewok use a config file named ewok-config.properties to configure it's properties:

	 #zookeepere servers

	 ewok.zkServers=localhost:2181

	 #special server id for this tm,default is local address

	 ewok.serverId=test

	 #zookeeper namespace

	 ewok.zkRoot=ewok

	 #zookeeper session timeout

	 ewok.zkSessionTimeout=5000

	 #A path to load other TM's logs,default is null

	 ewok.loadZkPath=

	 #Ledger ensemble size

	 ewok.ensembleSize=1

	 #Ledger quorum size

	 ewok.quorumSize=1

	 #Ledger password

	 ewok.password=ewok

	 #Batch size to read entries from ledger

	 ewok.cursorBatchSize=5