Overcommitting with KVM

KVM logo Someone pointed out a shocking fact in LET that KVM, the new popular virtualization type, can be over-committed even more then the infamous OpenVZ

The KVM hypervisor supports overcommitting CPUs and overcommitting memory. Overcommitting is allocating more virtualized CPUs or memory than there are physical resources on the system. With CPU overcommit, under-utilized virtualized servers or desktops can run on fewer servers which saves power and money.

Read it all at docs.redhat.com
also read the complete thread at LET Is KVM the next oversold VPS? for more enlightenment

vzfree utility to check memory usage in OpenVZ VPS

From the official blog post

Gee. It has been a while since I’ve last written here, and it will be a while again for my next post as I will be on holidays from next Monday (visiting families in Hong Kong and Taiwan). Let me share one small utility program that I wrote quite a while ago.

We all know that the Linux command free(1) is pretty useless inside an OpenVZ VE, even those with meminfo virtualised. So I basically wrote this little util to grab the data from the dreadful user_beancounters and format them into something useful. It’s written in C and only depends on libc so it’s pretty light weight. It also does a little bit of analysis instead of just dumping the data, which I will explain later on.

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QuickWeb VPS Benchmark

Unix Benchmark results from QuickWeb using unixbench v 5.1.2. QuickWeb offers 2 Core i5 750 @ 2.67GHz cores on their Germany node.

Brilliant result!. I am really impressed with the benchmark numbers because this is pretty close to the benchmark results of 1024MB OpenVZ with another provider that I posted earlier.

Specs: 512MB OpenVZ running Ubuntu 10.04 LTS 32bit

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HazeNet VPS Benchmark (latest from their XEON nodes)

Update (14-May-2011): HazeNet has been taken over by ThrustVPS / Rus Foster. Read more about it here

This benchmark is #2 in the series from HazNet, the previous one was done on their Core2Quad series and this one is on their latest XEON nodes.

Unix Benchmark results from HazNet using unixbench v 5.1.2. HazeNet offers 4 cores on their 1024 and 2048 packages.

Specs: 1024MB OpenVZ running Ubuntu 10.04 LTS 32bit

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VPSLatch VPS Benchmark

Unix Benchmark results from VPSLatch (OpenVZ running Ubuntu 10.04 LTS 32bit on their Orlando, FL node) using unixbench v 5.1.2

Specs: 1024MB / 60GB OpenVZ running Ubuntu 10.04 LTS 32bit

Note: This VPS has the best benchmark that I have ever seen, wow, no doubt Adam is having busy managing the best VPS+CPanel combination ever!

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Spacerich VPS Benchmark

Update (26-Aug-2010): From my experience, they have very huge iowait and hence I/O problems on their VPS servers. You have to wait for like 10-15 seconds for a ‘uptime’ command to execute which is pretty pathetic. So in my opinion, it was useless for me.

Unix Benchmark results from Spacerich (OpenVZ running Ubuntu 10.04 LTS 32bit on their Munich, Germany node) using unixbench v 5.1.2

Specs: 256MB / 25GB OpenVZ running Ubuntu 10.04 LTS 32bit

Note: Being in Europe, it has the best response time to Asia especially Pakistan

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