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make default min ttl 5 (#2227)

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Chris O'Haver 2018-10-22 16:59:12 -04:00 • committed by GitHub
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commit 96529b2c50
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3 changed files with 5 additions and 5 deletions
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4
plugin/cache/README.md vendored
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@ -40,10 +40,10 @@ cache [TTL] [ZONES...] {
* **TTL** and **ZONES** as above. * **TTL** and **ZONES** as above.
* `success`, override the settings for caching successful responses. **CAPACITY** indicates the maximum * `success`, override the settings for caching successful responses. **CAPACITY** indicates the maximum
number of packets we cache before we start evicting (*randomly*). **TTL** overrides the cache maximum TTL. number of packets we cache before we start evicting (*randomly*). **TTL** overrides the cache maximum TTL.
**MINTTL** overrides the cache minimum TTL (default 0), which can be useful to limit queries to the backend. **MINTTL** overrides the cache minimum TTL (default 5), which can be useful to limit queries to the backend.
* `denial`, override the settings for caching denial of existence responses. **CAPACITY** indicates the maximum * `denial`, override the settings for caching denial of existence responses. **CAPACITY** indicates the maximum
number of packets we cache before we start evicting (LRU). **TTL** overrides the cache maximum TTL. number of packets we cache before we start evicting (LRU). **TTL** overrides the cache maximum TTL.
**MINTTL** overrides the cache minimum TTL (default 0), which can be useful to limit queries to the backend. **MINTTL** overrides the cache minimum TTL (default 5), which can be useful to limit queries to the backend.
There is a third category (`error`) but those responses are never cached. There is a third category (`error`) but those responses are never cached.
* `prefetch` will prefetch popular items when they are about to be expunged from the cache. * `prefetch` will prefetch popular items when they are about to be expunged from the cache.
Popular means **AMOUNT** queries have been seen with no gaps of **DURATION** or more between them. Popular means **AMOUNT** queries have been seen with no gaps of **DURATION** or more between them.

4
plugin/cache/cache.go vendored
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@ -239,9 +239,9 @@ func (w *ResponseWriter) Write(buf []byte) (int, error) {
const ( const (
maxTTL = dnsutil.MaximumDefaulTTL maxTTL = dnsutil.MaximumDefaulTTL
minTTL = 0 minTTL = dnsutil.MinimalDefaultTTL
maxNTTL = dnsutil.MaximumDefaulTTL / 2 maxNTTL = dnsutil.MaximumDefaulTTL / 2
minNTTL = 0 minNTTL = dnsutil.MinimalDefaultTTL
defaultCap = 10000 // default capacity of the cache. defaultCap = 10000 // default capacity of the cache.

2
test/cache_test.go
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@ -48,7 +48,7 @@ func TestLookupCache(t *testing.T) {
}) })
t.Run("Short TTL", func(t *testing.T) { t.Run("Short TTL", func(t *testing.T) {
testCase(t, state, p, "short.example.org.", 1, 1) testCase(t, state, p, "short.example.org.", 1, 5)
}) })
} }