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32 Comments
- isolationism, on 10/12/2007, -0/+7Depends whether you're a yank or not. American English uses the letter z in such cases, the rest of the English-speaking world uses s.
- Laton, on 10/12/2007, -1/+7It depends which side of the Atlantic you come from. But since the word does not appear in any of the dictionaries I looked at, it doesn't seem to matter anyway. I vote for s instead of z, but that's because I speak Commonwealth English, not American.
edit: Beaten like a red headed stepchild. - Teilo, on 10/12/2007, -0/+5CentOS 5 here we come!
- moofree, on 10/12/2007, -0/+5I'm sorry, Silvervale is the itanium virtualization technology, Vanderpool is the one for the pentiums/cores/whatever they call them now, and it appears that all new intel processors already support it
http://en.wikipedia.org/wiki/Vanderpool
Gotta catch myself up! - moofree, on 10/12/2007, -0/+4Xen virtualization.
This will be even better once intel and amd cpus get Silvervale and Pacifica (respectively) into their chips. You have to modify the kernel of the virtualized machine if there's no hardware virtualization support on the chip (impossible for windows of course)
Xen is even faster than vmware in my experience. - inactive, on 10/12/2007, -0/+3While I liked Whitebox, I like Centos even better. RHEL4 clones make *great* servers.
- riskable, on 10/12/2007, -0/+2Finally! Where I work every project gets its own budget and project teams almost never share resources. This means that they end up buying whole new servers all the time for applications that will end up using less than 10% of the CPU most of the time. Most just sit idle 99% of the day. This wastes enormous amounts of company resources in the form of data center space, hardware budgets, power consumption, etc.
With official support for Xen, we'll probably start doling out virtual servers instead of the real thing. It will be better for everyone.
-Riskable
http://www.riskable.com
"I have a license to kill -9" - funkytaco, on 10/12/2007, -0/+2Interesting. Too bad Xen's RAM allocation isn't shared/burstable like OpenVZ or Virtuozzo's.
- inactive, on 10/12/2007, -0/+2"Wow. 1 comment and on the front page already?"
It's the power of Kevin Rose, this story kinda sat and didn't get alot of diggs but as soon as Kevin Dugg it, it took off. - moofree, on 10/12/2007, -0/+2qemu is an emulator, unless you install the (closed source) kqemu module, or the (open source, but i've never tried it) QVM86 module. These modules provide virtualization support. (kqemu ran pretty well when i tested it a few months ago)
There are always going to be alternatives out there. Choice is what modern OSS *ix is all about. - digdugsmug, on 10/12/2007, -0/+2Anyone know how long after a version of enterprise Redhat is released it is before there is a Cent OS equivalent version available?
- jasutton, on 10/12/2007, -0/+2Redhat mainly sells support. Give it a few months and you'll see CentOS 5 released (built from the same sources as RHEL) which is free.
http://centos.org - inactive, on 10/12/2007, -0/+2News flash: VMWare ESX is perfect for what you guys are doing.
We installed it along with another 3gb of ram on a Dell 2850 here, and it runs 5 operating systems around the clock. 2 are domain controllers, 2 are web servers, one is an application server. It's like having 5 computers in one, and with dual Xeons in that box, it never stresses too hard. The only thing that makes it slow down is Microsoft SQL running on one of the VMs, and even more (extremely expensive dual rank) ram would fix that. Dell is supposed to be issuing a bios update soon for that series that allows usage of Dual Rank ddr's, so we may just add ram.
Then again for the cost of that exotic ram we may just get another 2850. - leonbev, on 10/12/2007, -0/+2Heh... I guess that this explains why VMWare has been doing such a crappy job with RHEL support lately :)
- funkytaco, on 10/12/2007, -0/+2I highly recommend CentOS as well for those who've never heard of it. http://www.centos.org It's up to CentOS 4.2 stable which is basically RHE4.
- mooninite, on 10/12/2007, -0/+2Why not just run Fedora Core?
- s-m-a-c-k, on 10/12/2007, -0/+1is the XEN featured in SUSE 10 the latest version?
- crackez, on 10/12/2007, -0/+1This sucks, I just spent a whole bunch of time migrating several older servers onto on Compaq DL580 (4x3GHz Xeon, 5GB RAM, 73GB RAID1) using OpenVZ. Now CentOS will have Xen, so I spent all that time going the easy but slightly less flexible way where if I had come up for excuses for waiting, half my job would be done for me!
Oh well, at least if I go with Xen when CentOS 5 comes out, I can migrate the services over to Xen VMs on another box, then rebuild the DL580 and migrate the Xen VM's back with no down time. It just so happens I have an extra DL380 G4 just sitting there, that I use as a test machine occasionally. Both are nice fast boxes... Now only if I had something more interesting to run on them then lame Java Web Apps. :-p - majormar, on 10/12/2007, -0/+1You don't have to modify anything if you run QEMU :) See the first episode of the_source at http://www.thesourceshow.org.
- totalnet, on 10/12/2007, -0/+1care to explain or are you just posting, so you can get people to click on your URL?
- drag, on 10/12/2007, -0/+1Yes ESX can do what they want certainly..
Of course with the new cpus coming out being able to virtualize non-ported operating systems on Xen would provide better performance then ESX server. Also would come by pretty much default with Suse/Redhat/Fedora or whatever you'd want to install rather then having to buy a ESX license.
Also with Xen if you combine that with a server shared storage scheme (aka distributed file systems) like a SAN or GFS or Lustre or whatever then you'd be able to migrate operating systems from computer to computer to load balance your network and hardware resources. WHILE the systems are running. Downtime for servers being migrated from Xen host to Xen host is measured in milliseconds.
A test with a quake 3 server running on a Xen host was able to be moved from one computer to another with numerous player clients on a LAN and they didn't notice the transition in the middle of game-play.
Seriously at my local Lug a speaker gave a example that they since they based their data center on Xen and Linux they were able to migrate the system a few hundred miles to avoid the hurricanes from last year.. with no downtime.
Of course I expect that ESX will have similar features, but you have to admit that's a pretty nice concept.
Of course it's major downside is that without these 'VT' extensions in the processor to aid in it's virtualization it only works with systems that have been modified (slightly) to work with it.
Early on in Xen they had support from Microsoft even and had Windows running on it. Of course, since Xen is open source and all that and virtualization would be used to help people migrate AWAY from Windows, MS pulled the plug on it.
For Vmware obviously Xen is a threat.. but that's why they released their excellent Vmware-player and server projects for no-cost. There are a crapload of pre-made images made to work on it.. Ubuntu, Redhat ES, Oracle 10 server demos, etc etc. Of course Windows doesn't work in that either due to licensing restrictions.
It's a nice way to do safe, cross-platform applications. If you have something very complex that you need to install on a clients machines. Stuff with databases or special network configurations or whatnot, you just give them a image. Then it doesn't matter what OS they are running. Windows XP, Windows 2k, Windows 9x, Linux, FreeBSD, or (probably) eventually even X86 OS X. It doesn't matter what spyware or what cpu they are using or hardware configuration. If it works in Linux it will work in vmware-player in those environments.
For instance they have that 'safe browser appliance', which is firefox running on a stripped down ubuntu install. Runs just like any other browser on your desktop, but is perfectly safe and you can reset the image so that no important information ever gets leaked out or saved. It is virtually impossible to get any spyware or get hacked by using it. - OneFishTwoFish, on 10/12/2007, -0/+1You can get RHEL for anywhere from $180 (WS) to $2600 (AS), and yes, you're paying for support and software updates. WS is identical software to ES/AS (other than the options on the canned installer), and you can install it howerver you like, especially if you know kickstart. You'll still get all your software updates, but the Red Hat TAC may balk at helping you debug your enterprise database installation on your "workstation."
If you want to learn RHEL to get a job or certifications but are put off by the license fee then CentOS may be a better choice than Fedora. - Elranzer, on 10/12/2007, -3/+3Virtual SenSATION!!
- mikeod, on 10/12/2007, -0/+0According to Stevens, this is about "taking the rocket science away from users.
This guy is a genius. - StuffMaster, on 10/12/2007, -1/+1Sweet. I use White Box Linux (Red Hat Enterprise clone) 4 on my web/mail server. Maybe I'll upgrade to 5.
- digdugsmug, on 10/12/2007, -0/+0Any Idea how long after RHEL 5 is released till CentOS 5 would be released? I started using CentOS 4 after it was released so I don't know how long that one took to come out.
- beforeIforget, on 10/12/2007, -0/+0Why does Red Hat Enterprise Linux cost $350 for the server version? Is this only for support? Can you install this as many times as you want?
/or should I just go Fedora? - jas0n, on 10/12/2007, -0/+0You are partially correct when you say it is impossible for windows. Though Microsoft is involved in the Xen research in Cambridge and at the start they permitted a modified kernel. So Linux and Windows were running on a physical machine at the same time. Xen is many many times faster than vmware.
- nonchallant0819, on 03/31/2008, -1/+0This is a great story... found this one through http://www.google.com
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http://www.TopNotchCarpentry.com - v3xt0r, on 10/12/2007, -2/+1Marketing Hype, Mainstream Fud, Proprietary Open Source, go red hat!!
Why read 'Linux for dummies', just install Red Hat!! =p - Arbinshire, on 10/12/2007, -3/+2Wow. 1 comment and on the front page already?
- SpectoriS, on 10/12/2007, -5/+1Uh, correct me if Im wrong, but isn't it 'virtualization', not 'virtualisation'..?
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