-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 To whom iy may concern,
On 2/16/2009 4:21 PM, GF wrote: > I wrote a tutorial about load balancing Tomcat with Apache Proxy Module. > > This is the url: > http://www.zulutown.com/blog/2009/02/16/java-ee-load-balancing-with-tomcat-and-apache/ > Any feedback will be really appreciated. This is less of a tutorial and more of a single example. A few things that you don't really describe too well: 1. Why use different port numbers for each backend server? This is probably appropriate if you are playing with a clustered configuration on a single box just to test the config, but a production cluster is likely to have all the same port numbers being used in <Connectors>. You mention same IP/port but don't say why that would be a good or bad idea. 2. Why is ProxyPass defined within a <Location> element? 3. Why aren't you using ProxyPassReverse? 4. Why don't you explain the use of the 'retry' parameter? Why are you explicitly defining it to be it's default (60)? Also, why wouldn't you include a link to the official documentation (http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html) and (http://tomcat.apache.org/tomcat-6.0-doc/cluster-howto.html)? The official documentation contains working examples, too. About the only thing you needed to add to the official documentation was to talk about the stickysession and route parameters and how they connect-up to the Tomcat configuration. Presumably, your audience is already familiar with setting up Tomcat and possibly Apache httpd. I think you spend too much time on those configurations and too little explaining how to wire the sticky sessions and jvm routes. Sure, you cover them, but it gets lost in all the other stuff. Don't get me wrong: I'm glad people are writing blog entries like this and trying to publish good information, but I have seen way too many "howtos", "tutorials", etc. that end up publishing The Way To Do It™ and none of the readers end up learning anything. The result is that folks come to the list and say "I read this guy's tutorial and now my configuration doesn't work". The problem is that they've been given an example configuration with no background information. No depth. You don't cover anything about the implications of load-balancing across multiple stateful servers. This gets into clustering, which you only really mention once. The reader is left to either a) wonder what a cluster is or b) come to the mistaken conclusion that a cluster is a group of servers being load-balanced. I would recommend making this a series of articles, and go into further depth in later installments. This first one should have been titled "this configuration works; more to come later". - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkmZ8v8ACgkQ9CaO5/Lv0PDMCgCgiZoqn2FDLp/7qQMch/UZGn1u EYcAniZImGWytuor6UqrzX2L7veGtOiV =4CpF -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
