[ http://jira.magnolia-cms.com/browse/MAGNOLIA-3905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Daniel Lipp updated MAGNOLIA-3905: ---------------------------------- Fix Version/s: 5.0 Alpha2 s011 (was: 5.0) > Remove usage of ExclusiveWrite > ------------------------------ > > Key: MAGNOLIA-3905 > URL: http://jira.magnolia-cms.com/browse/MAGNOLIA-3905 > Project: Magnolia > Issue Type: Improvement > Security Level: Public > Components: core > Reporter: Fabrizio Giustina > Assignee: Daniel Lipp > Priority: Critical > Fix For: 5.0 Alpha2 s011 > > > Performances of concurrent editing in Magnolia is highly affected of the > global sinchronization on ExclusiveWrite, expecially due to the usage in > SaveHandlerImpl. > ExclusiveWrite was more a quick and dirty hack than a solution to concurrency > implemented years ago. The main reason why it's bad is that is global: no > matter which node you are saving or which repository you are working on, you > will hold a lock which will block any other dialog from saving. That means > that also saving a document to the dms or anything else into the data module > is actually locking the whole system for editing. > A second reason why it's bad: it has totally no effect on clustered > instances, since it's local to a single Magnolia instance. IF the problem > it's trying to fix is concrete, synchronization should be done on a > repository level, not at instance level. > A good approach would be using jcr locks on nodes (locking works also with a > clustered repository). > Since Magnolia actually uses a "soft locking" approach everywhere, by > allowing concurrent editing assuming that concurrent save operation on the > same node would be really limited, my suggestion is to simply get rid of the > synchronization block in SaveHandlerImpl, without introducing addictional > checks at the moment. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.magnolia-cms.com/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ---------------------------------------------------------------- For list details, see: http://www.magnolia-cms.com/community/mailing-lists.html Alternatively, use our forums: http://forum.magnolia-cms.com/ To unsubscribe, E-mail to: <dev-list-unsubscr...@magnolia-cms.com> ----------------------------------------------------------------