Comments on: Is Virtuozzo good for OpenVZ? http://hostingfu.com/article/is-virtuozzo-good-for-openvz Web Hosting Blog by a Software Developer Fri, 02 Jul 2010 10:59:16 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Dev http://hostingfu.com/article/is-virtuozzo-good-for-openvz/comment-page-#comment-361 Dev Fri, 29 Dec 2006 06:23:25 +0000 http://hostingfu.com/?p=77#comment-361 <p>Matt, aren't you taking simlpy what Herbert tells you? 1. Have you looked at so called disk I/O QoS in Vserver? It is not <em>per-VPS</em>. Simply run 10 tars in one VPS and monitor how it affects another one. You will be suprised :) You will be suprised to know that CFQ scheduler also doesn't handle writes. OpenVZ is going to fix all this very soon and the first step was already done - commited disk I/O accounting patches. 2. limit for RSS? do you really think that killing an application w/o giving it a chance to handle out-of-memory situation gracefully is a good idea? ok, if I wanted to select the easies way, I would definetely choose the same.</p> <p>why don't you use vserver if it is more advanced? don't you want to do all this dirty hacks and tweaks to make it work?</p> Matt, aren’t you taking simlpy what Herbert tells you?
1. Have you looked at so called disk I/O QoS in Vserver?
It is not per-VPS. Simply run 10 tars in one VPS and
monitor how it affects another one. You will be suprised :)
You will be suprised to know that CFQ scheduler also doesn’t handle writes.
OpenVZ is going to fix all this very soon and the first step was already done -
commited disk I/O accounting patches.
2. limit for RSS? do you really think that killing an application w/o giving it a chance
to handle out-of-memory situation gracefully is a good idea?
ok, if I wanted to select the easies way, I would definetely choose the same.

why don’t you use vserver if it is more advanced? don’t you want to do all this dirty hacks and tweaks to make it work?

]]> By: scotty http://hostingfu.com/article/is-virtuozzo-good-for-openvz/comment-page-1#comment-363 scotty Wed, 20 Dec 2006 23:14:42 +0000 http://hostingfu.com/?p=77#comment-363 <p>Hi Matt!</p> <p>"Now based on all of this, why did you choose OpenVZ over VServer?"</p> <p>Sold by the SWSoft propaganda that Virtuozzo == VPS?</p> <p>We actually have used OpenVZ for quite a while at work when we started getting those 4-core 2850/2950's with massive amount of RAM for development. When I did a search on "VPS" on Google, it looked like the most obvious choice was Virtuozzo because "everyone else was using it". As OpenVZ is similar to Virtuozzo so we went ahead with it.</p> <p>I was aware of VServer but had an impression that quite a lot of things have not been virtualized (networking, or iptables as you have mentioned), but from the spec it does have a lot of advantages over OpenVZ. It's definitely on my to-do list, but I'll leave it to next year :)</p> Hi Matt!

“Now based on all of this, why did you choose OpenVZ over VServer?”

Sold by the SWSoft propaganda that Virtuozzo == VPS?

We actually have used OpenVZ for quite a while at work when we started getting those 4-core 2850/2950′s with massive amount of RAM for development. When I did a search on “VPS” on Google, it looked like the most obvious choice was Virtuozzo because “everyone else was using it”. As OpenVZ is similar to Virtuozzo so we went ahead with it.

I was aware of VServer but had an impression that quite a lot of things have not been virtualized (networking, or iptables as you have mentioned), but from the spec it does have a lot of advantages over OpenVZ. It’s definitely on my to-do list, but I’ll leave it to next year :)

]]> By: Matt Ayres http://hostingfu.com/article/is-virtuozzo-good-for-openvz/comment-page-1#comment-362 Matt Ayres Wed, 20 Dec 2006 15:53:55 +0000 http://hostingfu.com/?p=77#comment-362 <p>Interesting to mention Linux VServer. I know the project very well since it's beginnings and even contributed lots of testing and some code to it's earlier versions. I am actually amazed OpenVZ was adopted so rapidly by many while Linux VServer/FreeVPS projects have both existed for years before. Linux VServer is a more advanced kernel than OpenVZ's in some areas with CoW links vs overlay filesystem (VZFS), a limit for RSS (even before Virtuozzo SLM was available), and CFQ disk I/O QoS implemented per-VPS. What OpenVZ did provide was mature tools, easy installation, and a 100+ page PDF manual. It doesn't help that Linux VServer does not yet have iptables inside the VPS or even 2nd-level quota support (which it actually had in it's 2.4 kernel). Now based on all of this, why did you choose OpenVZ over VServer?</p> Interesting to mention Linux VServer. I know the project very well since it’s beginnings and even contributed lots of testing and some code to it’s earlier versions. I am actually amazed OpenVZ was adopted so rapidly by many while Linux VServer/FreeVPS projects have both existed for years before. Linux VServer is a more advanced kernel than OpenVZ’s in some areas with CoW links vs overlay filesystem (VZFS), a limit for RSS (even before Virtuozzo SLM was available), and CFQ disk I/O QoS implemented per-VPS. What OpenVZ did provide was mature tools, easy installation, and a 100+ page PDF manual. It doesn’t help that Linux VServer does not yet have iptables inside the VPS or even 2nd-level quota support (which it actually had in it’s 2.4 kernel). Now based on all of this, why did you choose OpenVZ over VServer?

]]>