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Well, we all know that won't work for all users. I thought you were attempting to support different distributions/et al back and forth between OVZ and KVM, and that's where it gets hairy.
But since you still offer OpenVZ plans, it's not as though it were a discontinued product line for you, in which case it's a bit odd to speak of "really stubborn OVZ people that don't want to move".
Some people are stubborn and refuse to let go, and will find someone else to buy the product they want in the case that you don't have it.
If so, then that is what he should say. :-)
I think he was just humblebragging, myself.
I hadn't realized that they offered free backups on OpenVZ. (It seems that it's only in Las Vegas and for the 256MB+ OpenVZ plans, but still, not bad.)
Couldn't you give a free backup on top of their KVM for those (old) customers (when they'll cancel you'll slowly have less and less backup space in use).
Backups are a lot bigger with KVM. Compression doesn't seem to save much because it's a block level backup (I think). That's for RAW, maybe it's different with QCOW.
With OVZ, you just backup the container folder like you would any other folder. I think vzdump is just a tar.gz backup that also includes the CTID.conf file. So more straight forward and smaller backups.
One more reason I prefer OVZ over KVM.
Because filesystem level access to host is preferred to a large data blob? I'm not sure why you are so die-hard OVZ, but really, it makes my life easier, even though you think it makes yours the same.
Sure QCOW will be smaller (and slower). Until i have used my disk to take a backup of /dev/urandom that is. Neither RAW or QCOW are all that great anyways unless by RAW you mean physical partitions or something backed by LVM.
Anyways as long as your costumers aren't playing with encryption or writing random shit to disk you might have some luck with one of the more exotic compression tools like LRZIP.
True, but that's only 128MB's that we offer, nothing else.
I've already discussed doing a one-off RAM bump to make them 'workable' on KVM. I'd have to never offer the product again though otherwise it could cannibalize other products.
Francisco
Oh, you're right: I glanced at this page earlier, https://my.frantech.ca/cart.php?gid=12 , and thought that all of the OpenVZ plans were available except for the biggest one, which explicitly says "Out of Stock". (But I didn't look further.)
That's another advantage of containers in general. Since they do not run a kernel you save anywhere from 10-35MB of memory per container. That matters when the container is only 128MB.