Quote:
Originally Posted by sevenl
That is true for the most part. However, if another VPS on the host server is compromised and launches a DoS attack that uses the NIC in it's entirety, that would most definitely have a negative impact on your VPS. We've had it happen once or twice and it wreaks havoc until the IDS can kick in and let us know what's going on. In addition, if the VPS Host Server itself is compromised, there's a good chance you can say goodbye to all the VM accounts. Now that would suck.  |
This is very true. We use a VPS and sometimes our sites/applications really slow down. Remember if your host has one big 16GB dual CPU Server with say 4 disks in a RAID conf BUT has 16 VPS environments all possibly running multiple sites in those environments then there us a lot of disk activity. Those disks can only read and write certain amounts of data no matter what.
We are suffering slow speed on our sites from heavy bandwidth and disk activity from other VPS users. One of our VPS is idle much of the time and runs pretty fast, but sometimes we suffer slow speeds in those idles times because of the hardware activity. VPS environments are great, but they cannot allocate you dedicated resources on the NIC and disks (OpenVZ for certain) so you will suffer performance issues if others on the node are hogging!
In my opinion and testing, dedicated servers are much better and perform better consequently in line with our apps. VPS are cheap, quick and easy to setup.
With a dedicated server it means just that its all yours. Although VPS you get all your own software and environment and you share hardware. Anything that you share means slower.