[infinispan-issues] [JBoss JIRA] Created: (ISPN-1297) add option to enable 1PC for induced transactions

[Mircea Markus (JIRA)]

add option to enable 1PC for induced transactions
-------------------------------------------------

                 Key: ISPN-1297
                 URL: https://issues.jboss.org/browse/ISPN-1297
             Project: Infinispan
          Issue Type: Feature Request
          Components: Configuration, Transactions
            Reporter: Mircea Markus
            Assignee: Mircea Markus
             Fix For: 5.1.0.ALPHA1, 5.1.0.FINAL


Starting with Infinispan 5.1 a cache is only able to function in either transactional or non-transactional mode. Mixed mode won't be supported any more.
This is causing a backward compatibility issue for existing users that make both transactional and non-transactional access to the same cache. 
A good example is the Lucene-directory that is writing to a cache through batching API *and* directly. In Lucene-D's case, one can configure autoCommit=true for a transaction: that will induce a transaction within direct (i.e. non transactional) calls. Whilst this preserves backward compatibility, it is not "good enough" as an injected transaction does results in 2 RPCs, one for each phase of 2PC, and that is less performant than the "old" direct call. In order to solve this performance shortcoming, another attribute is to be added: use1PcForInducedTransaction(default to true). Enabling this attribute causes the *induced* transaction to force an 1PC resulting in a single RPC. Other tx that induced one won't be affected by this configuration. 

This mail thread is also relevant: http://bit.ly/plNbLT

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira