Comments on: Xen or OpenVZ VPS?

By: PerfoHost

PerfoHost — Tue, 16 Feb 2010 22:09:17 +0000

You may be curious to see our KVM VPS page at http://perfohost.com/kvm.vps.html where we compare KVM VPS vs OpenVZ/Virtuozzo vs Xen side by side. KVM is a most advanced Open Source virtualization solution on the market and after testing it for awhile, we prefer it over Xen and OpenVZ.

By: EasyBoxLite

EasyBoxLite — Wed, 23 Dec 2009 09:15:55 +0000

Xen和OpenVZ…

Xen和OpenVZ的简单比较，以及相关问题的处理方法。本文一部分来自hostingfu（非常好的一篇文章），也有些是自己零散的搜索到的。 Xen和OpenVZ简要介绍 Xen和OpenVZ都是开源软件。Xen是一个半虚拟化平台，看起来更像真正的独立主机。你可以安装自己的Linux内核、模块，并且对于内存等资源的虚拟更合理且是可以预测的。OpenVZ则是操作系统级虚拟化，所有虚拟机工作在同一个内核下，性能好。更详细介绍参见Wiki或者官方网站。 Xen 内存管理…

By: 再谈VPS：Xen与OpenVZ技术的详细比较与性能测试（附廉价VPS推荐列表） | Observer专栏杂记

再谈VPS：Xen与OpenVZ技术的详细比较与性能测试（附廉价VPS推荐列表） | Observer专栏杂记 — Fri, 18 Dec 2009 07:28:41 +0000

[...] 1.关于Xen和OpenVZ的详细分析，受益匪浅：http://hostingfu.com/article/xen-or-openvz [...]

By: Virtuozzo vs. Xen » Servers and Services

Virtuozzo vs. Xen » Servers and Services — Fri, 27 Nov 2009 10:24:30 +0000

[...] allows the operating system handle memory and swap to disk as needed. Memory on Virtuozzo is a much muddled situation. To the VPS instance, it all appears to be memory, when in fact it’s not. With Virtuozzo, [...]

By: Xen vs OpenVZ » Servers and Services

Xen vs OpenVZ » Servers and Services — Fri, 27 Nov 2009 10:20:02 +0000

[...] http://hostingfu.com/article/xen-or-openvz [...]

By: dutchman

dutchman — Fri, 09 Oct 2009 21:35:00 +0000

Swap inside vps under OpenVZ

OpenVZ does not support Swap. If you have a program that requires swap, then you can create and use a fake swap.

Instructions:

1) Log into your vps as root.

2) Create the next fake-swap.sh shell-script.

#!/bin/bash

SWAP="${1:-512}"

NEW="$[SWAP*1024]"; TEMP="${NEW//?/ }"; OLD="${TEMP:1}0"

umount /proc/meminfo 2> /dev/null
sed "/^Swap\(Total\|Free\):/s,$OLD,$NEW," /proc/meminfo > /etc/fake_meminfo
mount --bind /etc/fake_meminfo /proc/meminfo

free -m

3) Make script executeable

chmod u+x fake-swap.sh

4) Run script to create fake swap ...

... with 512MB (default)

./fake-swap.sh

... with 1024MB

./fake-swap.sh 1024

By: Ramblingwood

Ramblingwood — Mon, 29 Jun 2009 21:40:32 +0000

Thank you very much for this incredibly helpful article. So many people had recommended OpenVZ that I almost bought it. I needed 110MB of the 128MB RAM provided by the VPS and I couldn't get a straight answer out of anyone.

Many thanks.

By: Cheap VPS

Cheap VPS — Thu, 21 May 2009 21:32:05 +0000

We really like Xen. We use it with our hosting company and everything works out really well.

By: mark kimsal

mark kimsal — Sat, 17 Jan 2009 16:00:23 +0000

I would like to see a discussion about RAM FS on each virtualization technology. I remember trying to setup a filesystem in RAM on an OpenVZ machine last year and I could not do it. I know that you can do it on Xen, because I’m doing it right now on two Xen VPS instances. There’s something very strange about the way OpenVZ handles your memory.

By: indiehead

indiehead — Fri, 13 Jun 2008 16:35:40 +0000

thanks for posting this, i'm building a server and have been contending with the various VM systems for inclusion. this just proves the point i've been feeling in my gut that Xen is the better choice for the task, even if it's swappyness needs tuning, but what doesn't.

thanks again.