applideveloper / cachectl

Page Cache Controller For Regular File in Go

cachectl

cachectl is a controller for regular file's page cache.

Dependency

posix_fadvise is required.

Build

make gom
make bundle
make

Show Page Cache Stat For File

cachectl -f /var/log/access_log

Purge Page Cache For File

cachectl -op purge -f /var/log/access_log

If you want to leave a cache appended recently, assigning a rate for purging page cache with -r is recommended.

cachectl -op purge -f /var/log/access_log -r 0.9

cachectld

cachectld is a daemon for scheduled purging page cache. Its behavior is described by TOML.

cachectld -c conf/cachectld.toml

Configuration for cachectld

A configuration for cachectld has one or multiple targets.

name	type	description	default	note
path	string	target file path		directory or file path
purge_interval	int	interval for purging page cache for file	0	unit is second
filter	string	filtering pattern string for target file path	.*	regular expression with golang's regexp package
rate	float	rate of puring page cache for file	1.0	0.0 < rate <= 1.0

A example is below.

[[targets]]
path = "/vagrant/cachectl.go"
purge_interval = 30

[[targets]]
path = "/vagrant/cachectld.go"
purge_interval = 20

[[targets]]
path = "/vagrant/cachectl"
purge_interval = 5
filter = "\\.go$"
rate = 0.9

License

Copyright 2014-2015 Tatsuhiko Kubo

Licensed under the MIT License.