Very old snapshots filling array - Tegile T4200
Hi everyone. I'm looking for any info/advice that you could offer about a tricky situation I've inherited. The array in question is a Tegile Intelliflash T4200 that is end-of-support with the vendor, and it's currently at 85% capacity with more than half of the space consumed by snapshots. When investigating further I discovered some very old and large storage snapshots that were created by Veeam backup software and never properly deleted. These snapshots are not listed within the array web GUI, and were discovered via the zfs command line, which I am not very familiar with. As you can see in the 2nd screenshot, some of these snapshots are 6 years old.
My concern is that if the snapshots are not cleaned up the array will soon run out of space and cause critical issues that I am ill equipped to resolve.
Can someone help me understand the performance impact of deleting these very old snapshots? Is there a smarter way to resolve this issue than deleting them? The LUNs in question contain live production VMs, and although they are not particularly performance sensitive I am concerned about the destroy operation causing such a large performance hit that the array becomes unresponsive and causes a prolonged outage.
I am currently scrambling to find a 3rd party support vendor with expertise on this particular array, but I would appreciate any insight or advice you guys could offer.