SLOG usage with VMs

[byroncollege]

For those using their freenas to serve datastores to Hypervisors, how much is writen to your SLOG per hour?

I am seeing about 10G per hour, is that excessive? I know it all depends on how much the VMs are getting used etc etc. But I just wanted to make sure I have missed something, as I can't figure out what the VMs are doing that would be writing so much data, or if its just general usage when you Virtualise a machine.

About 8 windows VMs doing various tasks including a DFS server which all users connect to. Not much data is created though, users mainly read.

Cheers

 

[depasseg]

It really depends on your use case. 10G an hours doesn't seem like much at all.

Every Sync write will be written to your SLOG. And keep in mind, this isn't just new data, it could be temp, modifications, or updates within each VM.

 

[L]

SLOG data moves in and out very quickly. It holds the write until it is committed. The rate you want to understand is peak per second. There a command line tool called zilstat. It will show you your peaks.

 

[byroncollege]

Thanks a lot for the info

Cheers