Apache Log Reader

Blazing fast log reader capable of working with giant log files (gigabytes) without too much of a spin. Give it a try 🚀

Note: The program is built on the assumption that all logs are sorted by datetime (append mode) and log files are sorted by modified time (which falls under the first condition). Make sure to have these preconditions in order to replicate the same results and test.

Prerequisites

• Make sure you have installed Go version >= 1.17

Resources

• YouTube Video
• Log Generator Archive

Build

# compiles and generates binaries for log-reader and log-generator inside the ./bin directory
make build

Run

Note: Keep in mind the log-reader binary will print logs using UTC time, instead of your local time! Also, the log-generator binary will generate logs in the future as well, for you to be able to test them before the log files modified time gets too old.

# run: "make build" first
# only run once to generate the test data, it may take a while (~5m)
./bin/log-generator
./bin/log-generator -dir <path/to/generated/logs>
# run the log-reader with the specified cli arguments
./bin/log-reader -d <path/to/log/files> -t <last_n_minutes>
# run the program directory without generating any binary
go run cmd/log-generator/main.go -dir <path/to/dir/testdata> -interval <interval_between_logs> lines-max <max_number_of_lines_per_log_file> lines-min <min_number_of_lines_per_log_file>
go run cmd/log-reader/main.go -d <path/to/log/files> -t <last_n_minutes>
# generate testdata in the current directory
./bin/log-generator
# adjust maximum/minimum number of logs per file and maximum number of log files
./bin/log-generator -lines-max 100000 -lines-min 50
go run cmd/log-generator/main.go -max-files=5 -max-lines=5 -min-lines=5
# display all logs from testdata directory that happened in the last 5 minutes
./bin/log-reader -d ./testdata -t 5

Test

# runs all the tests present in test files
make test
# generate testdata
make testdata
# generate the benchmark data
make benchdata
# runs all the benchmarks present in test files
make bench

Benchmarks

M1 Max

goos: darwin
goarch: arm64
pkg: github.com/chill-and-code/apache-log-reader/logging
BenchmarkIndexTime-10    	    3340	    369069 ns/op	   84364 B/op	     145 allocs/op
PASS
ok  	github.com/chill-and-code/apache-log-reader/logging	2.230s

Intel i9

cpu: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
BenchmarkIndexTime-16    	    1258	    800551 ns/op	   91046 B/op	     156 allocs/op
PASS
ok  	github.com/chill-and-code/apache-log-reader/logging	1.126s