The document discusses new features in Apache HTTP Server (httpd) version 2.4 and Apache Tomcat versions 7 and 8. Some key improvements in httpd 2.4 include better performance, optimizations to make it "cloud ready" with asynchronous I/O and a new multi-processing module. Tomcat 7 offers Servlet 3.0 compliance and improved startup time. Tomcat 8 features Servlet 3.1 with non-blocking I/O, HTTP protocol upgrades, and support for SPDY and web sockets. The presentation covers using httpd as a reverse proxy and load balancer for backend servers like Tomcat.

1. 3th April 2013
Enterprise(d) Tomcat in Action
Václav Tunka
Software Engineer,
JBoss by Red Hat

2. What will we cover
• Short intro to httpd and tomcat
• New features in httpd 2.4
• New features in Tomcat 7 & 8

3. httpd
• Multi-platform HTTP server with reverse
proxy, load balancing, virtual hosting, ...
• httpd 1.0 was initially designed for a
different situation than we have now
• A lot of clustered servers for backend
(tomcat, AS, jetty), now we need
clustering for httpd as well

4. Some statistics

5. httpd 2.4
• Improvements in performance
• Making httpd “cloud ready”
• Async I/O
– Multi-Processing Module workers (MPM)
as default.
• High-performance APR

6. Apache Portable Runtime
• Platform independent API for:
– Memory allocation and memory pool
functionality
– Atomic operations
– Dynamic library handling
– File I/O
– Locking
– Thread, process and mutex functionality

7. Modules
• Bandwith control: mod_ratelimit
• Security: mod_reqtimeout
• I/O buffer control: mod_buffer
• LUA support: mod_lua
• Making the proxy cloud friendly:
– mod_slotmem_shm (from mod_cluster)

8. Reverse proxy
• Support for dynamic configuration.
• Runtime change of clusters w/o
restarts.
• mod_proxy_express for cloud services.
• Connection pooling

9. Cloud ready
• Solving horizontal scalability.
• Low latency.
• Fast request-response turover.

10. Time for Tomcat

11. Tomcat 7
• Servlet 3.0 compliant
– asynchronous execution of processing
– pluggability and extension support
– new set of annotations
• JSP 2.2 – Jasper part of Tomcat project

12. Tomcat 7
• Valves replaced by Filters (Valves still
work)
• Startup time reduced
• Easy to configure programatically

13. Tomcat 8
• Servlet 3.1
– Non-blocking I/O
– HTTP protocol upgrade mechanism
– Security improvements
• JSP 2.3
• SPDY
• Web sockets

14. References
• [1] httpd usage according to W3Tech
• Apache and Tomcat logos from
apache.org
• Mladen Turk's httpd and Tomcat
presentations

15. Questions?
15

16. 16