Optimize Prime - Comments

Don't use Pound for load balancing - xufeng

xufeng — Fri, 19 Jun 2009 02:22:21 -0400

LVS is a layer 4 loadbalancing solution whereas nginx acts as a layer 7 (app layer) proxy.They are different.LVS is great in performance and nginx is better in its flexible controling over its backend servers.

Don't use Pound for load balancing - Emre Sokullu

Emre Sokullu — Thu, 29 Jan 2009 17:04:54 -0500

At GROU.PS we used Pound and it was terrible! It starts melting at 1500 connections. It's old. I read something similar at a Wordpress.com developer blog too. Nginx looks pretty good, we've recently started experimenting with it. Thanks for sharing your experiences, it's good to know what others are doing.

Don't compile Hadoop more than once: Shutting down. Incompatible buildVersion. - SD

SD — Fri, 23 Jan 2009 13:25:55 -0500

I had the same problem with Hadoop 0.19.0 and solved it using your approach. Thanks! This seems awfully brittle. I hope newer versions do not have this constraint.

Don't use Pound for load balancing - T

Fri, 16 Jan 2009 13:17:03 -0500

It sounds like you are running load balancing on the same server you are using to handle web requests.

That's not what Pound was intended for, and it's not a recommendable solution. Load balancer should run on a different, dedicated machine. In that config, performance should not be an issue. If your server is also a load balancer, you are doubly screwed if the server has problems, is DOS overloaded, etc.
-t

Don't compile Hadoop more than once: Shutting down. Incompatible buildVersion. - Amaltas

Amaltas — Sun, 28 Dec 2008 02:39:03 -0500

I exprienced the same issues, using the same build fixed the issue.

Don't compile Hadoop more than once: Shutting down. Incompatible buildVersion. - Amaltas

Amaltas — Sun, 28 Dec 2008 02:39:01 -0500

I exprienced the same issues, using the same build fixed the issue.

Don't use Pound for load balancing - Lou

Lou — Sat, 29 Nov 2008 12:22:09 -0500

I just spent a few hours reading about Pen and Pound. NGinx sounds like a good solutions, though I have to deal with SSL. Will explore it some more as well as Crossroads mentioned in a post.

- Lou

Don't use Pound for load balancing - Rene

Rene — Sun, 26 Oct 2008 18:26:10 -0400

We are using crossroads (http://crossroads.e-tunity.com) for our load balancers. It's much faster and has a lot of advanced features like access control and dos prevention.

Google Ownz Me - haiz

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Shortest parser - Gojomo

Gojomo — Sun, 24 Aug 2008 16:34:40 -0400

If you don't mind a regex-heavy approach, here's a single-method version in Ruby that handles precedence correctly and maintains the ability to pass in (single-character, precedence-grouped) operators:

<code>
def in_to_pre_fix(expr, opers=%w(*/ +-))
token = "\\s*(?:(?:<([^>]+)>)|([\\d]+))\\s*"
while expr !~ /^<[^>]*>$/ and expr.sub!(/(?:^|$)([^)(]*)(?:$|$)/) { | m |
opers.each { | oper |
while m.sub!(Regexp.new("#{token}([#{Regexp.quote(oper)}])#{token}"),
'<\3 \1\2 \4\5>'); end }
m.tr_s("() "," ").strip() }; end
expr.delete("<>")
end
</code>

I'm new to Ruby, so this may not be typical idiom or whitespace.

Shortest parser - Alejandro Atienza

Alejandro Atienza — Sun, 24 Aug 2008 10:01:45 -0400

Anon, you don't need parenthesis if you consider each operand as binary, like in + 1 + 2 + 3 4, but here they are making them n-ary, as in (+ 1 2 3 4). That way you need parenthesis to delimit the scope of the operand.

Shortest parser - Anon

Anon — Sun, 24 Aug 2008 04:18:21 -0400

I thought you didn't need parans. Isn't that the whole point of prefix or postfix expressions. So compilers don't face ambiguity when it comes to evaluating expressions?

http://www.allinterview.com/showans...

Shortest parser - a different anon

a different anon — Sun, 24 Aug 2008 01:42:41 -0400

no, the order of operations is wrong. it should result in

"(+ 2 (/ (* 4 45) 2) 9)"

Shortest parser - Anonymous Coward

Anonymous Coward — Sat, 23 Aug 2008 22:12:36 -0400

That seems to be working as intended. 2+(4*(45/2))+9

Shortest parser - anonymouse

anonymouse — Sat, 23 Aug 2008 21:51:35 -0400

buggy code...

irb(main):022:0> parse_simple("2+4 * 45 / 2 + 9")
=> "(+ 2 (* 4 (/ 45 2)) 9)"

Don't use Pound for load balancing - Emmett Shear

Emmett Shear — Thu, 21 Aug 2008 12:35:58 -0400

The distinction between a web server and a load balancer like Pound is trivial. Nginx can do everything pound can do (balance incoming requests across backends) and many more things (serve files, do complex access control, etc.).

Don't use Pound for load balancing - vietwow

vietwow — Thu, 21 Aug 2008 04:18:41 -0400

Why you think Nginx is a good replacement for pound ? Pound is Load balancer (like LVS), and Nginx is a web server (like apache, IIS ...). I don't think they have any relationship ?

Don't use Pound for load balancing - Friend

Friend — Thu, 01 May 2008 06:45:41 -0400

I use nginx as back-end and it works great :)

Thanks for graphs with pound!

Don't use Pound for load balancing - Emmett Shear

Emmett Shear — Tue, 04 Mar 2008 12:33:33 -0500

Thanks Jason...I'll look into using that plugin.

Don't use Pound for load balancing - anon

anon — Tue, 04 Mar 2008 04:44:46 -0500

We are using LVS for loadbalancing and it seems that it almost doesn't need any cpu time at all, even at peaks it doesnt go over 5% (on a P4 3Ghz) and peaks are like 2K requests per second.