Difference between revisions of "FAQ"
(→Installation and upgrade) |
(added UBC q/a) |
||
| Line 1: | Line 1: | ||
== General == | == General == | ||
; What is a Virtual Environment (Virtual Private Server, VPS, VE)? | ; What is a Virtual Environment (Virtual Private Server, VPS, VE)? | ||
| − | + | See [[VE]] | |
; Who needs OpenVZ? How it can be used? | ; Who needs OpenVZ? How it can be used? | ||
| Line 40: | Line 40: | ||
; What is veth and how do I use it? | ; What is veth and how do I use it? | ||
: See [[Virtual Ethernet device]] | : See [[Virtual Ethernet device]] | ||
| + | |||
| + | == User Beancounters == | ||
| + | ; How can I reset <code>failcnt</code> in <code>/proc/user_beancounters</code>? | ||
| + | : In short — only by stopping and starting a VE. In some cases you need to keep VE in a stopped state for a few minutes. | ||
| + | |||
| + | : Long answer: there can be many application who reads /proc/user_beancounters, and thus if you will reset it you gonna have problems with those other apps. | ||
| + | : Consider what happens if you will reset you sent/received packets/bytes statistics on the network interface — programs which reads will be screwed up. | ||
| + | : So the proper thing to watch for is not the current value of, say, failcnt, but whether it is increased (from the previous reading) or not. You can write a simple shell script to do just that. | ||
== Troubleshooting == | == Troubleshooting == | ||
Revision as of 07:07, 13 July 2006
General
- What is a Virtual Environment (Virtual Private Server, VPS, VE)?
See VE
- Who needs OpenVZ? How it can be used?
- See Use cases
- How is OpenVZ different from other technologies?
- See Introduction to virtualization
- How is OpenVZ updated and why it is secure?
- See Security
- I want to show my appreciation to OpenVZ and put some logo to my site. Where to get it?
- See Artwork
Installation and upgrade
- What hardware is supported by OpenVZ kernel?
- See Virtuozzo HCL.
- Why there are different kernel flavours available and what do they mean?
- See Different kernel flavors (UP, SMP, ENTERPRISE, ENTNOSPLIT)
- How do I rebuild the kernel?
- See Kernel build
- What does 021stab018 in OpenVZ kernel version mean?
- See Kernel versioning
- How can I check package signatures?
- See Package signatures
- Is it possible to run x86 VPS on a x86_64 arch?
- Sure :) We actually did some work on that to enable migration of x86 VE from x86 to x86_64 and back, and to enable using 32-bit iptables in 32bit VE on an x86_64 system.
Networking
- How do I set up VPN for a VE?
- See VPN via the TUN/TAP device
- What is veth and how do I use it?
- See Virtual Ethernet device
User Beancounters
- How can I reset
failcntin/proc/user_beancounters? - In short — only by stopping and starting a VE. In some cases you need to keep VE in a stopped state for a few minutes.
- Long answer: there can be many application who reads /proc/user_beancounters, and thus if you will reset it you gonna have problems with those other apps.
- Consider what happens if you will reset you sent/received packets/bytes statistics on the network interface — programs which reads will be screwed up.
- So the proper thing to watch for is not the current value of, say, failcnt, but whether it is increased (from the previous reading) or not. You can write a simple shell script to do just that.
Troubleshooting
- My kernel crashed. What should I do?
- See When you have an oops
- I see a lot of processes in D state. What does that mean?
- See Processes in D state
