[ 
https://issues.apache.org/jira/browse/CLOUDSTACK-2843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13694952#comment-13694952
 ] 

ASF subversion and git services commented on CLOUDSTACK-2843:
-------------------------------------------------------------

Commit 0035bbba34d57c6b6bc35d5ada751235e7a7fb35 in branch 
refs/heads/master-6-17-stable from [~alena1108]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=0035bbb ]

Reverting the commit for parallel vm deployment, from beta branch

Revert "CLOUDSTACK-2843: Provideded an ability to turn off the synchronization 
being done on the CS agent side,"

This reverts commit 0fe7c5c9353eb1970238015cf48668d196adf82d.

Conflicts:
        server/src/com/cloud/configuration/Config.java
        setup/db/db/schema-410to420.sql

                
> Support parallel VM deployment with CloudStack
> ----------------------------------------------
>
>                 Key: CLOUDSTACK-2843
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-2843
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>          Components: Management Server
>    Affects Versions: 4.2.0
>            Reporter: Alena Prokharchyk
>            Assignee: Alena Prokharchyk
>             Fix For: 4.2.0
>
>
> When a user deploys multiple instances concurrently, the deployment of these 
> VMs are in fact queued up, so although CloudStack reports that all 
> deployments have started to be created, it would appear in reality that until 
> the 1st instance is deployed, the second, third, etc are queued and waiting 
> to be executed. 
> CS should be able to support parallel VM deployment assuming the cluster 
> resources can handle it.
> As a part of it, we have to:
> 1) Set executeInSequence=false for Start/Stop commands (also might make it 
> false for PrimaryStorageDownload command as well)
> 2) Identify possible implication of turning off the synchronization for those 
> commands, and fix the problematic places in the code.

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