Is it possible to clear cache without restarting?

[olehz]

Is it possible to clear cache without restarting? I have data that updated frequently (every hour or every five minutes). It would be nice to be able to adjust TTL for each individual layer (for instance in config):

"source": "tmsource:///bla-bla",
"ttl":30,
"headers": {
"Cache-Control": "public,max-age=30"
}