Mirrors/coredns
1
0
Fork 0
mirror of https://github.com/coredns/coredns.git synced 2025-11-02 02:03:13 -05:00
Code Issues Packages Projects Releases Wiki Activity

plugin/cache: Set min TTL default to zero (#2199)

Browse Source 
* set min ttl default to zero

* add short TTL test case
This commit is contained in:
Chris O'Haver
2018-10-16 09:24:40 -04:00
committed by Yong Tang
parent 8cc8afa96a
commit 4a5641c379
4 changed files with 22 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
plugin/cache/README.md vendored
View File

@@ -41,10 +41,10 @@ cache [TTL] [ZONES...] {
* **TTL** and **ZONES** as above.
* `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.
**MINTTL** overrides the cache minimum TTL, which can be useful to limit queries to the backend.
**MINTTL** overrides the cache minimum TTL (default 0), which can be useful to limit queries to the backend.
* `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.
**MINTTL** overrides the cache minimum TTL, which can be useful to limit queries to the backend.
**MINTTL** overrides the cache minimum TTL (default 0), which can be useful to limit queries to the backend.
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.
Popular means **AMOUNT** queries have been seen with no gaps of **DURATION** or more between them.

4
plugin/cache/cache.go vendored
View File

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