Architecture: Cluster Communication

• Connection pooling

  • Reuse of connections to other servers reduces the overhead of TCP/IP establishment and possible Apache forking.

• Keepalive exploiting

  • Keepalives allow reuse of exisiting TCP/IP sessions by pipelining HTTP requests.
  • If keepalives are unconditionally enable internally to the cluster (Apache source patch available), high traffic sites that wish to disable keepalives can still exploit connection pooling.

Notes: