Messages in this thread | | | Date | Tue, 6 Dec 2005 14:20:53 +1100 | From | Andrew Morton <> | Subject | Re: [ANNOUNCE] first stable release of OpenVZ kernel virtualization solution |
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Kirill Korotaev <dev@sw.ru> wrote: > > Hello, > > We are happy to announce the release of a stable version of the OpenVZ > software, located at http://openvz.org/. > > OpenVZ is a kernel virtualization solution which can be considered as a > natural step in the OS kernel evolution: after multiuser and > multitasking functionality there comes an OpenVZ feature of having > multiple environments.
Are you able to give us a high-level overview of how it actually is implemented? IOW: what does the patch do?
> ... > > As virtualization solution OpenVZ makes it possible to do the same > things for which people use UML, Xen, QEmu or VMware, but there are > differences: > (a) there is no ability to run other operating systems > (although different Linux distros can happily coexist); > (b) performance loss is negligible due to absense of any kind of > emulation; > (c) resource utilization is much better.
What are OpenVZ's disadvantages wrt the above?
> The dynamic assignment of resources in OpenVZ can significantly improve > their utilization. For example, a x86_64 box (2.8 GHz Celeron D, 1GB > RAM) is capable to run 100 VPSs with a fairly high performance (VPSs > were serving http requests for 4.2Kb static pages at an overall rate of > more than 80,000 req/min). Each VPS (running CentOS 4 x86_64) had the > following set of processes: > > [root@ovz-x64 ~]# vzctl exec 1043 ps axf > PID TTY STAT TIME COMMAND > 1 ? Ss 0:00 init > 11830 ? Ss 0:00 syslogd -m 0 > 11897 ? Ss 0:00 /usr/sbin/sshd > 11943 ? Ss 0:00 xinetd -stayalive -pidfile ... > 12218 ? Ss 0:00 sendmail: accepting connections > 12265 ? Ss 0:00 sendmail: Queue runner@01:00:00 > 13362 ? Ss 0:00 /usr/sbin/httpd > 13363 ? S 0:00 \_ /usr/sbin/httpd > 13364 ? S 0:00 \_ /usr/sbin/httpd > 13365 ? S 0:00 \_ /usr/sbin/httpd > 13366 ? S 0:00 \_ /usr/sbin/httpd > 13370 ? S 0:00 \_ /usr/sbin/httpd > 13371 ? S 0:00 \_ /usr/sbin/httpd > 13372 ? S 0:00 \_ /usr/sbin/httpd > 13373 ? S 0:00 \_ /usr/sbin/httpd > 6416 ? Rs 0:00 ps axf
Do the various kernel instances share httpd text pages?
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