Raul-
I'm not sure what makes you think you need the commercial Xen for
anything you mention. We run the open source Xen on boxes with 16Gig+
Ram and 4 processor cores. There is no limitation to the open source
Xen afaik it can easily address 64Gigs of ram and many processors.
-Ezra
On Feb 9, 2007, at 9:26 AM, Raul wrote:
>
> OK thanks everyone! I actually got CentOS 4.4 running flawless on
> one of my
> servers and everything looked great. Then I followed the OpenVZ
> install
> instructions and it worked fine. I have 3 VPS's running on this
> machine.
> And then, suddenly remembering what a linux noob I am, I wondered
> "What
> now?". :)
>
> I could see that I have 3 vps each with their own IPs etc but couldn't
> figure out how I was then going to install my apps on each one
> etc. I guess
> I really gotta get my head around linux before anything else.
>
> It sounds like I'll be trying XenExpress to see how it works and
> determine
> if I'll need to be buying Xen commercial to go forward (if I use
> Xen I need
> the multiprocessor and 16gb ram support). When you get right down
> to it I
> really just want Apache or Nginx running with as many mongrels
> behind it as
> reasonable. I did set up a successful development server on
> Windows with
> Apache 2.2 and 5 mongrel services that seems to run fine, but I
> understand
> that for large scale performance of Rails and MySQL (and the
> ability ot
> automate deployment with Capistrano) that I'd be better off to go
> linux.
> Not to mention that I'll need about $7000 in Microsoft licenses to
> go the
> Windows route!!
>
> Thanks again, I'll keep pushing on and report back as I figure
> things out.
>
> Appreciated!
>
> Raul
>
>
> ----- Original Message -----
> From: "Paul Stadig" <[EMAIL PROTECTED]>
> To: "Deploying Rails" <rubyonrails-deployment@googlegroups.com>
> Sent: Friday, February 09, 2007 4:01 AM
> Subject: [Rails-deploy] Re: OpenVZ versus Xen or others
>
>
>>
>> I've had experience with both OpenVZ and Xen on with different
>> hosting
>> companies. The OpenVZ server we had with vpslink.com just would not
>> install Oracle XE. It was a problem with swap memory. The VPS at
>> vsplink didn't have any, and even though it had plenty of memory
>> Oracle would just crap out during install. I'm not sure if this is
>> related to some limitation with OpenVZ, but most Xen hosts I've seen
>> give you some swap, too. I even tried enabling my own swap, but it
>> just wouldn't work.
>>
>> My problems may have had more to do with the suckiness of Oracle than
>> anything else. Their install script for XE just directs error
>> messages to /dev/null, so I spent many hours trying to figure out why
>> the Oracle install "completed successfully" but was broken when I
>> tried to use it.
>>
>> You've been warned.
>>
>>
>> Paul
>>
>> On Feb 8, 11:52 pm, Robby Russell <[EMAIL PROTECTED]>
>> wrote:
>>> Ezra Zygmuntowicz wrote:
>>>
>>>> On Feb 8, 2007, at 7:30 PM, Robby Russell wrote:
>>>
>>>>> Raul wrote:
>>>>>> Hi again. All the great assistance so far has moved me
>>>>>> along. I'm
>>>>>> still a Linux noob but I've settled on CentOS 4.4 and have it
>>>>>> up and
>>>>>> running on a test server right now. I'll be testing two
>>>>>> scenarios: one
>>>>>> with Apache 2.2 and mod_proxy_balancer in front of a mongrel
>>>>>> cluster,
>>>>>> and another with NGINX in front of a mongrel cluster.
>>>
>>>>>> Remeber I have 3 machines with dual, dual-core Xeons and 16gb of
>>>>>> ram per
>>>>>> server and I want to maximize the performance, 146gb of
>>>>>> storage on
>>>>>> two
>>>>>> and a 73gb mirror with a 600gb raid 5 on the last one (I had
>>>>>> intended to
>>>>>> use the raid5 for the mySQL database). So I've looked into
>>>>>> virtualization a bit to see what the benefits might be and it
>>>>>> sounds
>>>>>> great. Now I noticed that XenExpress only supports up to 4gb of
>>>>>> ram and
>>>>>> I understand there may be a mySQL 4gb per process limit as
>>>>>> well. I
>>>>>> could buy commercial Xen but I found OpenVZ (open source
>>>>>> branch of
>>>>>> Virtuozzo) and it sounds pretty good too. I understand that each
>>>>>> solution accomplishes virtualization in different ways though
>>>>>> so any
>>>>>> guidance would be appreciated.
>>>>> We've been testing both of these solutions out. Xen is pretty
>>>>> rocking if
>>>>> you want to manage several different distros and such. Each
>>>>> virtual
>>>>> server has it's own kernel running with Xen... which will take
>>>>> more
>>>>> resources on the server than OpenVZ. There is also the overhead of
>>>>> managing that many more servers/kernels.
>>>
>>>>> OpenVZ shares it's kernel with each of the virtual machines and
>>>>> works
>>>>> more like a FreeBSD jail. One of the cool features that really
>>>>> caught
>>>>> our attention as we've been investigating tools for our new
>>>>> product is
>>>>> live migrations!
>>>
>>>>> "Delivery of the checkpointing and live migration functionality as
>>>>> part
>>>>> of OpenVZ brings a capability that no other open source operating
>>>>> system-level virtualization software offers. It allows system
>>>>> administrators to move virtual servers between physical servers
>>>>> without
>>>>> end-user disruption or the need for costly storage capacity."
>>>
>>>>> http://openvz.org/news/announcements/kernel-2.6.9-stable-20061114
>>>
>>>> Ummm... Xen can do this too.
>>>
>>> "the more you know..." (tm)
>>>
>>> I'll look into that more.
>>>
>>>
>>>
>>>>> ..pretty cool, huh?
>>>
>>>> definitely cool, to be able to move a whole VM from one host to
>>>> another without any down time is kick ass ;)
>>>
>>> Yeah, I'm also curious if OpenVZ will get accepted into the Linux
>>> kernel
>>> as mentioned here:
>>>
>>> *http://linux.slashdot.org/article.pl?sid=06/01/17/2251233
>>> * and...http://rubyurl.com/2na
>>>
>>> Since they both approach things _slighty_ different, it's a good
>>> idea to
>>> consider the benefits of both before making a decision.
>>>
>>> I really _want_ to go the openvz route with a project we're
>>> working on,
>>> but xen keeps coming back to surprise me.
>>>
>>> Robby
>>>
>>> --
>>> Robby Russellhttp://www.robbyonrails.com/http://www.planetargon.com/
>>
>>
>>>
>
>
> >
-- Ezra Zygmuntowicz
-- Lead Rails Evangelist
-- [EMAIL PROTECTED]
-- Engine Yard, Serious Rails Hosting
-- (866) 518-YARD (9273)
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