Linked by Thom Holwerda on Thu 10th Nov 2011 20:45 UTC, submitted by Straylight
Oracle and SUN I just emerged, blinking, from the world of Skyrim, only to realise Sun Oracle has released the 11th version of Solaris (well, technically it's the 7th, but okay, we'll roll with it). I'll be honest and upfront about it: Solaris is totally out of my league, and as such, it's very hard for me to properly summarise what this release is all about, so I won't even try.
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RE[4]: Cloudwashing
by kokara4a on Fri 11th Nov 2011 11:03 UTC in reply to "RE[3]: Cloudwashing"
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Containers are really really neat. Lot of sys admins are excited about this. If you use VMware and start up several OS instances, then each guest OS will use 4GB RAM, and CPU, etc. With Containers, each guest will use 40MB and nil CPU. One guy booted 1.000 Containers on a server with 1GB RAM, it was extremely slow but it could be done. Try that with VMware.

What you say is true but it's not the entire picture. Virtualization is getting better by the day. There are memory ballooning drivers that will report the free memory in the guest so it can be marked free in the host. Same pages merging can also decrease the memory footprint of a VM. Using KVM with the appropriate Linux kernel inside occupies surpisingly little memory.

This Containers is the building block for virtualizing everything, the Network stack, etc. Everything is virtualized in Solaris 11. Create as many network cards as you want, create as many Containers as you want, etc - thus you can have lot of virtual servers in one Server. This is why Solaris11 is called "First Virtual OS" ever. In Linux, if you create a container, is everything else virtualized? The network stack? etc? No?

You have to specify which Linux container flavor you have in mind. Both OpenVZ and LXC have network stack virtualization. In fact, OpenVZ has everything Solaris Zones have (maybe not, I'm not familiar with Zones but OpenVZ is very feature rich). LXC has some shortcomings (e.g. there's no UID/GID virtualization) but is there in all recent kernels so very convenient to experiment with.

In short, I don't think that Solaris can boast big advantages in virtualization of any kind compared to Linux

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RE[5]: Cloudwashing
by Kebabbert on Fri 11th Nov 2011 11:34 in reply to "RE[4]: Cloudwashing"
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In short, I don't think that Solaris can boast big advantages in virtualization of any kind compared to Linux

Solaris has advantages over Linux virtualization.

(Solaris Containers are more mature than Linux. Solaris Containers started development in 1999, under a different name. Linux Containers came sometime early 2000.)

Solaris have more different virtualization techniques, for instance LDOMs, Containers, and probably a bunch of others.

Also, Solaris have virtualized everything, including the network stack. Linux has not. That is why Solaris is "the first Virtual OS" - a gimmick, yes. But still it is true. Thus Linux is copying Solaris Containers, as Linux copied ZFS (Btrfs) and copied DTrace (Systemtap) and probably copied a bunch of other Solarsi stuff as well.

As Sidicas said:

"The new Solaris supposedly lets you set up virtualized "zones" so you get all the benefits of virtualization without any of the drawbacks of losing all the hard drive space to multiple operating systems or getting hit with the redundant OS overhead of running multiple OSs, or having to worry about security updates for multiple OSs, on every server, etc. etc... It's sort of like Virtualization meets Chroot.. Then consider that you can easily take these "zones" and automatically duplicate them over to other hardware to add in redundancy.. Now imagine tens of thousands of servers where every server has their "zones" synchronized onto at least a few other servers which might not even be in the same country, let alone the same room... Where you can just walk around and power off random servers or even an entire data center and it won't matter and the customers won't even notice because of all the "enterprise class" redundancy... This is a "cloud" solution.. A whole ton of money poured into massively redundant self-managing server infrastructure and Oracle wants to be in on it..."

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