Install-DbaMaintenanceSolution - Add auto-scheduling

[potatoqualitee]

Adds auto scheduling. By default, when -AutoScheduleJobs WeeklyFull is used and if no other jobs are running at 1:15 AM, this is the schedule it makes:

 Install-DbaMaintenanceSolution -SqlInstance localhost -InstallJobs -AutoScheduleJobs WeeklyFull -ReplaceExisting

Name	Description
15 Minute Log Backup	Occurs every day every 15 minute(s) between 12:00:00 AM and 11:59:59 PM.
Daily Diff Backup	Occurs every week on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday at 1:15 AM.
Weekly Clean and Purge	Occurs every week on Sunday at 11:50:00 PM.
Weekly Full User Backup	Occurs every week on Sunday at 1:15:00 AM.
Daily Full System Backup	Occurs every day at 1:15:00 AM.
Weekly Index Optimization	Occurs every week on Saturday at 10:45:00 PM.
Weekly Integrity Check	Occurs every week on Saturday at 10:45:00 AM.

I decided to run the Weekly Clean and Purge at the same time bc it's not very impactful.

Index Optimization is 2.5 hours earlier (on Saturday night) than the full backups which will start at 1:15 AM on Sunday morning. Integrity checks start 12 hours earlier than that at 10:45 AM. I'm open to suggestions here.

Diffs run every night except the night that Fulls are made 👍🏼

You can change the start time if you wish then the subtractions will occur from that start time. Oh, and if anything is scheduled at 1:15 AM on Sunday, it'll keep trying for an open slot each hour until it finds it. So the next try will be at 2:15 AM, then 3:15 AM, etc.

I have to merge this by tomorrow, and will need to add tests and documentation but I wanted to do an earlier PR in case anyone wanted to review it.

[andreasjordan]

I'll try to have a look this weekend.

Just some days ago Brent blogged about his configuration: https://www.brentozar.com/archive/2023/05/how-to-configure-ola-hallengrens-database-maintenance-scripts-for-backups/

[potatoqualitee]

Thank you! Ola also added some suggestions to his FAQ

https://ola.hallengren.com/frequently-asked-questions.html

[jpomfret]

Love this idea! Makes sense to me - only concern for me would be the check db running at Saturday at 10:45:00 AM. I think a lot of businesses this would still be considered as business hours, even though it's a satuday?

[potatoqualitee]

It was challenging to figure out what should go where without overlap. One night is heavy IO with backups, then there's the integrity checks then I didn't want to encroach too much upon Friday bc that's when some people closeout and run stuff so this seemed like a reasonable compromise that would allow their week-end stuff to run. But overall, this is just an approximation for the general weekday crowd and weekenders can modify as needed.

[potatoqualitee]

i have to publish dbatools so this branch will be 2.0.2

[frodr1k]

I seem to cant find information about autoscheduling in the documentation yet.

/Fredrik

[potatoqualitee]

thank you! looking into it now

[potatoqualitee]

there we go, thanks for the ping! https://docs.dbatools.io/Install-DbaMaintenanceSolution