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Chapter 12. Migration from mod_jk Mod_cluster only support Apache httpd, there are no plan to support IIS or Iplanet. The migration from mod_jk to mod_cluster is not very complex. Only very few worker properties can't be mapped to mod_cluster parameters. Here is the table of worker properties and how to transfer them in the ClusterListener parameters. mod_jk worker property ClusterListener parameter Remarks host - It is read from the Address information port - It is read from the Port information type - It is read from the Protocol information route - It is read from the JVMRoute information domain domain That is not supported in this version redirect - The nodes with loadfactor = 0 are standby nodes they will be used no other nodes are available socket_timeout nodeTimeout Default 10 seconds socket_keepalive - KEEP_ALIVE os is always on in mod_cluster connection_pool_size - The max size is calculated to be AP_MPMQ_MAX_THREADS+1 (max) connection_pool_minsize smax The defaut is max connection_pool_timeout ttl Time to live when over smax connections. The defaut is 60 seconds - workerTimeout Max time to wait for a free worker default 1 second retries maxAttempts Max retries before returning an error Default: 3 recovery_options - mod_cluster behave like mod_jk with value 7 fail_on_status - Not supported max_packet_size iobuffersize/receivebuffersize Not supported in this version. Use ProxyIOBufferSize max_reply_timeouts - Not supported recovert_time - The ClusterListener will tell (via a STATUS message) mod_cluster that the node is up again activation - mod_cluster receives this information via ENABLE/DISABLE/STOP messages distance - mod_cluster handles this via the loadfactor logic mount - The context "mounted" automaticly via the ENABLE-APP messages. ProxyPass could be used too secret - Not supported connect_timeout - Not supported. Use ProxyTimeout or server TimeOut (Default 300 seconds) prepost_timeout ping Default 10 seconds reply_timeout - Not supported. Use ProxyTimeout or server TimeOut? directive (Default 300 seconds)