How would it affect performance of the whole
lvm2 pool if different
physical volumes have had different speed properties?
I'm speaking foremost in the
AWS/EC2 context. If I have one
physical volume which is 1TB (3000 IOps), the other is 100GB (300 IOps), would it degrade the whole LVM
volume group to just 300 IOps?
Based on this answer it seems that LVM is:
really just a table lookup in a fairly small table that block X is actually block Y on device Z.
Hence if I write one bunch of small files, which just happen to be mapped to the speedier
physical volume, the whole transaction must be quicker than if that it was mapped to the slower drive?
How does it work in general?