On May 28, 9:46 am, John Wilger <[EMAIL PROTECTED]> wrote: > On May 28, 12:06 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> > wrote: > > > On May 23, 8:40 am, dasil003 <[EMAIL PROTECTED]> wrote: > > I'm interested to hear what you perceive as the benefits of Joyent's > > offering -vs- a Xen based solution? > > Although I'm not the OP, I'll take a stab at why Solaris' VPS solution > interests me over Xen at the moment. > > The company I work for builds semi-custom web app tools which we then > host for the customer, so we use at least one server for each customer/ > product. So far, we've been using Xen-based virtual servers, and this > setup has been working great so far. Until last week... > > One of our production servers stopped responding. And by server, I > mean the physical box -- every single VM on it was down. It turns out > we were hit by a bug in Xen[1] that's been open since 2005 and seems > to affect the very core of the architecture. The layman's description > of the problem is that the kernel in one or more of the virtual > servers develops an issue with (IIRC) its interrupt timing and starts > spending all of its available CPU cycles logging a message that "time > went backwards". This somehow "infects" all of the other virtual > servers on the same box. The servers don't actually go /down/, they > just run out of processing power to handle any other task within a > reasonable amount of time. We have, thus far, been unable to determine > what specific conditions cause this behavior to start happening; so > even though it hasn't occurred on our other (physical) production > servers yet, we have no reason to believe that it won't.
What version of Xen were you using? I notice that nobody has reported on that ticket since 3.02. We've certainly never experienced that issue... Current Xen is 3.1. 3.03, 3.04, 3.04-1, and an untagged 3.04 tip have been available since then... The thing we like about Xen is that you get your own machines. They behave just like a real machine with respect to tuning, tweaking, etc. And, they're Linux machines, which is, we believe, a good thing in and of itself, while agreeing that Solaris is a very nice OS indeed. -- -- Tom Mornini, CTO -- Engine Yard, Ruby on Rails Hosting -- Support, Scalability, Reliability -- (866) 518-YARD (9273) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Deploying Rails" group. To post to this group, send email to rubyonrails-deployment@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/rubyonrails-deployment?hl=en -~----------~----~----~----~------~----~------~--~---
