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From "Damodar Reddy Talakanti" <>
Subject Re: Review Request 15344: Enabling DB HA for cloud stack data bases using mysql active-active solution
Date Tue, 12 Nov 2013 12:43:43 GMT

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(Updated Nov. 12, 2013, 12:43 p.m.)

Review request for cloudstack, Abhinandan Prateek and Darren Shepherd.


Fixing the issue with db connections after master goes down in case of having more than 2
db nodes.


Repository: cloudstack-git


To enable Data base High Availability for cloud stack management server database. We have
used Mysql's connector parameters to switch between master and slaves along with mysql's 2-way
replication and chain way of replication for more than 2 nodes

Due ot this defect changed 2 files to have synchronized
for on block of statements which were cauing Thread BLOCKING..

Diffs (updated)

  client/tomcatconf/ 31e0803 
  framework/db/pom.xml 5af00a0 
  framework/db/src/com/cloud/utils/db/ PRE-CREATION 
  framework/db/src/com/cloud/utils/db/ 39893bd 



Basic sanity testing is done using 2 nodes. If any transaction(api request) is in between
and if server goes down then that api request will fail


Damodar Reddy Talakanti

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