Number of slices required for CentOS under KVM?

Bill Tuttle

New Member
We are looking at moving our ecommerce website to a VPS. If we run CentOS and additionally Apache, MySQL, and a few other things, how many slices will we need to start with? How does this compare to OpenVZ? Thanks.

---Bill Tuttle <> Gryphon's Moon
 

Quags

Administrator
Staff member
For cpanel it is recommended to have 2 slices, on either kvm or openvz. You did not mention cpanel however, so if you are not running it, you probably can get away with 1 slice on either KVM or Openvz.

In all honesty your memory usage on openvz will be lower, because it is not loading the kernel into memory as part of the usage.

Slices can be added if it turns out you need more resources.
 

Bill Tuttle

New Member
Right, we hadn't planned on cPanel. We've read your posts on why to choose KM/OpenVZ and really can't see which way to go. It would seem like KVM is more secure. We aren't aware of any kernel modules or change we will need, so KVM isn't a must have. If, down the road, we decide to add something that would require something like that, could we upgrade to a KVM server at that point/? Thanks.
 

Quags

Administrator
Staff member
Switching to KVM requires an IP an data migration.

KVM is a better visualization type in my opinion because you get kernel access, and it allows for zero downtime backups with LVM snapshots. Java also works better.

If sphinx uses java, it may not like openvz. Otherwise it should work fine.
 
bill - you might take a good look at virtualmin/webmin instead of cPanel.

also, if you go with KVM up front, you dont need to migrate like i had to do !
 

Quags

Administrator
Staff member
With our current double ram offer, you can get cpanel working on most 1 slices vps's now.
 
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