vmware - ran out of space on datastore - vm's froze - I freed some space - most are running again

Don't assume, you can use all the space to 0 bytes free, you cannot.

yes, i would never take any system intentionally above 90%, i know I shouldnt expect to go to 100%....

To be expected!!!!

yes, i figured.... im not complaining my vms froze.... I'm askinng if there is anything I should check, not that I have things running again?  like maybe corruption on esxi datastore

and I'm afraid the rest is down to Poor Administration!

You should have seen the alerts! at 75% and 85%!

yea.... unfortunately acronis in inadvertently made another copy of new vm in the middle of the night..... im working on getting nagios set up on everything so that can have pagerduty actually call me, but havnt finished that yet....  
is there a way i can have vcenter or esxi atleast email me in the meantime?  I could link that up to a pagerduty call.

ESXi datastore will be find, but you could end up with corrupt virtual machine disks, if you had snapshots, and then they'll not power on, and they would be corrupted - game over! hence why it's important, not to go above 75%

vCenter Server can email you if you configure the actions in the alerts, with an email address, and add a SMTP server.

but you could end up with corrupt virtual machine disks, if you had snapshots, and then they'll not power on, and they would be corrupted - game over!

I had some VM's with snapshots, but they seem to have reconciled and booted OK... so I should be good right?  Or are there any possible extra latent problems I should test for?

Thanks!

You also need to check for snapshots on a daily basis, and check why you had snapshots.

Lucky, if you run out of space, they can get corrupted.