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author | 2017-06-13 12:39:10 -0700 | |
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committer | 2017-06-13 12:39:10 -0700 | |
commit | e9eda7e7c8ed75d62b02f23c62e8e318ea1685ae (patch) | |
tree | 152a04673698e1a39caa751c02612d4e21315662 /middleware/file/file_test.go | |
parent | b1efd3736e6e68ab01baf54f83071c62690899b2 (diff) | |
download | coredns-e9eda7e7c8ed75d62b02f23c62e8e318ea1685ae.tar.gz coredns-e9eda7e7c8ed75d62b02f23c62e8e318ea1685ae.tar.zst coredns-e9eda7e7c8ed75d62b02f23c62e8e318ea1685ae.zip |
New cache implementation and prefetch handing in mw/cache (#731)
* cache: add sharded cache implementation
Add Cache impl and a few tests. This cache is 256-way sharded, mainly
so each shard has it's own lock. The main cache structure is a readonly
jump plane into the right shard.
This should remove the single lock contention on the main lock and
provide more concurrent throughput - Obviously this hasn't been tested
or measured.
The key into the cache was made a uint32 (hash.fnv) and the hashing op
is not using strings.ToLower anymore remove any GC in that code path.
* here too
* Minimum shard size
* typos
* blurp
* small cleanups no defer
* typo
* Add freq based on Johns idea
* cherry-pick conflict resolv
* typo
* update from early code review from john
* add prefetch to the cache
* mw/cache: add prefetch
* remove println
* remove comment
* Fix tests
* Test prefetch in setup
* Add start of cache
* try add diff cache options
* Add hacky testcase
* not needed
* allow the use of a percentage for prefetch
If the TTL falls below xx% do a prefetch, if the record was popular.
Some other fixes and correctly prefetch only popular records.
Diffstat (limited to 'middleware/file/file_test.go')
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