Optics Light

Metrics gathering library for high-throughput and latency sensitive
services.

Main design goal is that recording a single should:

1. avoid sampling where possible
2. should not be more expensive then a single atomic operation (depends on metric
   type)
3. Keep the code relatively readable and maintenable

Simplification Optics by removing the external
polling agent which added too much operational and code complexity for very
little gain.

Building

Dependencies:

• libbsd
• libdaemon
• libmicrohttpd

Building:

$ mkdir build
$ cd build
$ PREFIX=.. ../compile.sh

Testing:

$ cd build
$ PREFIX=.. ../compile.sh test valgrind bench

$ PREFIX=.. ../compile.sh test_<name>
$ PREFIX=.. ../compile.sh valgrind_<name>
$ PREFIX=.. ../compile.sh bench_<name>

Usage

To log metrics refer to this example which describes the
basics of creating and logging metrics.

Pre-emptive Nit-picking

• Assumes AMD64
• Not 100% POSIX-compliant
• Only Linux is supported