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 an exisiting TCP/IP session by pipelining HTTP requests.
  • If KeepAlives are unconditionally enabled internally to the cluster (Apache source patch available), high traffic sites that wish to disable KeepAlives can still exploit connection pooling.

Notes: