----- Original Message ----- From: "Eli Mesika" <[email protected]> To: "Allon Mureinik" <[email protected]> Cc: "Liron Aravot" <[email protected]>, "Federico Simoncelli" <[email protected]>, "engine-devel" <[email protected]>, "Eduardo Warszawski" <[email protected]>, "Yeela Kaplan" <[email protected]> Sent: Friday, August 10, 2012 3:40:48 AM Subject: Re: [Engine-devel] Serial Execution of Async Tasks
----- Original Message ----- > From: "Allon Mureinik" <[email protected]> > To: "engine-devel" <[email protected]> > Cc: "Eduardo Warszawski" <[email protected]>, "Yeela Kaplan" > <[email protected]>, "Federico Simoncelli" > <[email protected]>, "Liron Aravot" <[email protected]> > Sent: Thursday, August 9, 2012 6:41:09 PM > Subject: [Engine-devel] Serial Execution of Async Tasks > > Hi guys, > > As you may know the engine currently has the ability to fire an SPM > task, and be asynchronously be "woken-up" when it ends. > This is great, but we found the for the Live Storage Migration > feature we need something a bit complex - the ability to have a > series of async tasks in a single control flow. > > Here's my initial design for this, your comments and criticism would > be welcome: > http://wiki.ovirt.org/wiki/Features/Serial_Execution_of_Asynchronous_Tasks_Detailed_Design Apart from the short explanation & flow , since this is a detailed design , I would add 1) Class diagram 2) Flow diagram +1 I am also interested to get a flow how a task is created (i.e - replacement of ConcreateCreateTask) - but this will be handled in what Eli has asked for. In addition, you have two titles of "Successful Execution". At "compensate" - see how revertTasks currently behaves. Also read - http://wiki.ovirt.org/wiki/Main_Page/features/RunningCommandsOnEndActionFailure This is the work I did for CloneVmFromSnapshot - not saying it's perfect - but you should have an infrastructure/pattern to rollback not just via spmRevertTask but also using an engine command. Yair > > > -Allon > _______________________________________________ > Engine-devel mailing list > [email protected] > http://lists.ovirt.org/mailman/listinfo/engine-devel > _______________________________________________ Engine-devel mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/engine-devel _______________________________________________ Engine-devel mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/engine-devel
