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Brad Fitzpatrick

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Linux Virtual Server [Jun. 4th, 2001|02:44 pm]
Brad Fitzpatrick
Been reading up on the LVS project ... it's a lot more mature than it was last time I checked. I'll have to continue reading after Friday.

I should study.
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Comments:
[User Picture]From: ekashp
2001-06-04 07:36 pm (UTC)

Re: LJ

Us old men get ornery now and then. Maybe you'd care to surf by my resume or press page at <href="http://www.kashpureff.org/">Kashpureff.org</a>. I've been 'round the block on the 'net a few times, and do get a little offended when folks who might have little clue come off as if I don't have one either. (or that I don't own an ISP - What was that all about ? Was just trying to offer Brad some co-lo. )

Yes, Cisco WW Director and 3DNS are pretty sucky, for what they charge you for sure. The third big player in the market is Resonate, I rate their local and wide area products highly.

Readers Digest Version of DNS load ballancing:
(it's not realy a hack at all...)

Given three servers, make all three authoritative for the desired name. On each server, only answer with that servers IP for an A record. Use short TTLs.

To understand how well this does work, consider the nature of UDP packets going to servers in diverse locations with servers under various loads. Yes, it does basicaly what Director and 3DNS do, with the exception of session persistance.

I read what I wrote earlier, and have to question you as to just how wonderful did I make it out to be ? It'll do a job.
No, it isn't a be-all solution, nor as you point out are the other solutions. It's a part of the puzzle. So is the option of using LVS clusters...
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[User Picture]From: foobar
2001-06-04 07:53 pm (UTC)

Re: LJ

Oh, I wasn't saying that you don't own an ISP. I was amazed that someone who has the money to buy an ISP would be so cheap as to try to avoid load balancers. Then again, most small ISPs don't actually host sites that do any noticeable traffic. Yours might be an exception, I don't know enough about it, as I've never heard of it before.

Yes, yes, I'm familiar with resonate too. Nice resume, looks rather like mine. :P It's nicely put together, though, I will say that. As far as experience, I don't really see anything on there that you've done that I haven't.

So how is that "hack" anything special? I've seen that in use before, and it's great, but let's rewind a bit, shall we?

"Except Brad just went and bought a crappy
load balancer - when I had already told him
how to do it with DNS last XMas already... "

Hmmm, sounds to me like you're saying that distributed data centers are a replacement for load balancing. See, the problem I have is when people try to act like they're smarter than other people by mocking their decisions and even worse, do it by making stupid comments.

If it's part of the puzzle, it's not a replacement for a different piece. You can't build a car by replacing the wheels with another bumper. Slap as many as you want on there, and while it might make a decent sled on snow, it's not gonna make much of a car.

Building a solid distributed environment takes a lot more than knowing how to set up DNS. I never claimed distributing servers was a replacement for a load balancer - you did.

If you had simply offered your "dns hack" as something to add to - not replace - the current load balancing setup, I never would have questioned you. You stuck that foot in your mouth, not me, don't blame me for pointing it out.
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