winnielinnie
MVP
- Joined
- Oct 22, 2019
- Messages
- 3,641
Is there a way to create / edit a Scrub Task to only run if the pool is not undergoing much activity, or is below a certain IOPS threshold?
Overnight, I was sending an entire pool (approximately 5TB of data) to a new offsite USB drive as an emergency backup. Lo' and behold, my Scrub Tasks were set to Sundays at midnight, with a threshold of 35 days, and thanks to Mr. Murphy, this Sunday was the next scheduled scrub for all pools. I started the copy before midnight and headed to bed, to check on the status the next day (today, Sunday.) For the record, I was not aware that my scrubs were scheduled to run this particular Sunday at midnight. I had forgot to check under the "Next Run" date.
Apparently, my system went ahead and scrubbed the entire pools, including the USB pool (since it uses the same name as a previous pool I used on an older USB drive.)
So basically, all at once, this was happening:
The system must have come to a crawl, and the copy apparently failed halfway through.
So that got me wondering, and hence my question:
"Is there a way to create / edit a Scrub Task to only run if the pool is not undergoing much activity, or is below a certain IOPS threshold?"
Overnight, I was sending an entire pool (approximately 5TB of data) to a new offsite USB drive as an emergency backup. Lo' and behold, my Scrub Tasks were set to Sundays at midnight, with a threshold of 35 days, and thanks to Mr. Murphy, this Sunday was the next scheduled scrub for all pools. I started the copy before midnight and headed to bed, to check on the status the next day (today, Sunday.) For the record, I was not aware that my scrubs were scheduled to run this particular Sunday at midnight. I had forgot to check under the "Next Run" date.
Apparently, my system went ahead and scrubbed the entire pools, including the USB pool (since it uses the same name as a previous pool I used on an older USB drive.)
So basically, all at once, this was happening:
- Sending from main pool (reads)
- Receiving to USB pool (writes)
- Scrub of main pool (reads)
- Scrub of USB pool (reads)
The system must have come to a crawl, and the copy apparently failed halfway through.
So that got me wondering, and hence my question:
"Is there a way to create / edit a Scrub Task to only run if the pool is not undergoing much activity, or is below a certain IOPS threshold?"
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