Limit on recovery of lost messages

In case of server crash, all messages from logging clients that are still logging messages will be lost. In future, CMLOG will provide a way to save these messages which then can be merged into the centralized database by a simple utility.

Name/Description	Value	Where
CMLOG_CLNT_PORT	8909	cmlogConfig.h
CLient Daemons run at this UDP port.
CMLOG_MIN_KEY_PAGE	10	cmlogConfig.h
Minimum number of keys on page.
CMLOG_PAGE_SIZE	4096	cmlogConfig.h
Database page size.
CMLOG_CLNT_PIPE	/pipe/cmlog_1	cmlogConfig.h
The pipe device on vxworks .
CMLOG_CLNT_PIPE	/tmp/cmlog_ip	cmlogConfig.h
The named pipe on Unix machines.
CMLOG_NUM_PROC_THREADS	10	cmlogConfig.h
Number of threads to process incoming I/O messages.
CMLOG_NUM_SVC_PROC	2	cmlogConfig.h
Number of processes to process query messages.
CMLOG_DSHMEM_SIZE	80 k	cmlogConfig.h
Size of a shared memory holding logging messages.
CMLOG_CSHMEM_SIZE	20 k	cmlogConfig.h
Size of a shared memory holding querying messages.
CMLOG_DBASENAME_SIZE	128	cmlogConfig.h
Maximum size of database file names.

Table 1: Most of static parameters for cmlog system.

Note: Linux uses clone system call to implement pthread. If cmlogServer is compiled using pthread on linux, limit CMLOG_NUM_PROC_THREADS to a small number.