hplog - A High-Performance Logger

hplog - A High-Performance Logger

The hplog contains a high-performance logger interface.

Features:

• Separate logger process so no log lines get lost on application crash
• Buffered read and writes to increase performance
• Automatically rotating logs with configurable number of backlogs
• Configurable log size
• up-to-date logfile (in spite of buffering)

Other interesting things:

• Uses 6 systems calls in underload situations per log line
  • 1 send() in the application
  • 1 nonblocking recv() in the log process
  • 1 select() in the log process
  • 1 recv() in the log process
  • 1 time() in the log process
  • 1 write() (called from fflush()) in the log process
• Uses LESS systems calls in overload situations per log line
  • 1 send in the application
  • the kernel buffers several log lines into one chunk recevied by recv() for each chunk:
    • 1 recv()
      (select() and second recv() is optimized away)
    • 1 time()
    • <1 write()
      (is buffered into 32K chunks)

Compilation / use

Compile hplogd.cc as a separate application

Put it somewhere in your path

Include hplog.cc in your normal application. If it is multithreaded make sure that you compile hplog.cc with -D_REENTRANT

Download

-rw-r--r-- 1 8451 102 2961 Jul 22 2000 hplog-1.1.tar.gz
-rw-r--r-- 1 8451 102 2915 Aug 20 2000 hplog-1.2.tar.gz
-rw-r--r-- 1 8451 102 3094 Oct 29 2000 hplog-1.3.tar.gz
-rw-r--r-- 1 root root 3100 Apr 28 2001 hplog-1.4.tar.gz
-rw-r--r-- 1 8451 102 2766 Apr 5 2000 hplog.tar.gz
-rw-r--r-- 1 8451 102 1273 Aug 20 2000 readme.txt