Question About Repositories and Max Concurrent Tasks

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Question About Repositories and Max Concurrent Tasks

Veeam Logoby HJAdams123 » Fri Mar 24, 2017 1:12 pm

Hello and Good Day Veeam Community...

Question about Veeam Repositories and and what is considered a task for a repository....

I understand the processing of a disk is considered a task for a repository. My question is, is a backup file merge process considered a task as well? How many backup merge processes can a repository do at once?

I have two jobs that I would like to send to the same repository. Both jobs are forever incrementals with a 30 day restore point setting, and each jobs typically takes about an hour to merge the oldest increment to the full. If I configure both to use the same repository, and all disk processing is done for both jobs, will it only do the merge process for one job and make the other one wait, or will it go ahead and do them both concurrently? (assume the backup repository has a 4 task concurrent limit configured)

-Harold
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Re: Question About Repositories and Max Concurrent Tasks

Veeam Logoby foggy » Fri Mar 24, 2017 3:46 pm

Hi Harold, each backup chain merge process takes a separate repository task. So, if you have per-VM chains enabled for repository, each VM will take a separate task for the merge (since each VM has a separate backup chain), if per-VM is disabled - a single task will be required for the entire job merge process. There are no limitations on the number of concurrent merges, so theoretically, all the repository slots may be taken by them (this can be controlled by ingestion rate limits).
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Re: Question About Repositories and Max Concurrent Tasks

Veeam Logoby HJAdams123 » Sat Mar 25, 2017 1:58 am

Thanks foggy, thats what I needed to know.

-Harold
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Re: Question About Repositories and Max Concurrent Tasks

Veeam Logoby mkretzer » Sat Mar 25, 2017 7:07 am

I found this to be one of the reasons we cannot use per-VM chains. Concurrency limits effectively lead to all the tasks beeing taken by merges and other backups could not run...

It would be better to have limits per type of action (merge, backup and so on).
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