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Volatile-ttl eviction policy implemented in terms of the pool.

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Precision of the eviction improved sensibly. Also this allows us to have
a single code path for most eviction types.
This commit is contained in:
antirez
2016-07-20 19:53:27 +02:00
parent 9f1b7ab2ed
commit 2d5eb1f1a0
2 changed files with 25 additions and 48 deletions
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8
src/server.h
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@ -348,15 +348,17 @@ typedef long long mstime_t; /* millisecond time type. */
* properties common to multiple policies is faster. */
#define MAXMEMORY_FLAG_LRU (1<<0)
#define MAXMEMORY_FLAG_LFU (1<<1)
#define MAXMEMORY_FLAG_ALLKEYS (1<<2)
#define MAXMEMORY_FLAG_NO_SHARED_INTEGERS \
(MAXMEMORY_FLAG_LRU|MAXMEMORY_FLAG_LFU)
#define MAXMEMORY_VOLATILE_LRU ((0<<8)|MAXMEMORY_FLAG_LRU)
#define MAXMEMORY_VOLATILE_LFU ((1<<8)|MAXMEMORY_FLAG_LFU)
#define MAXMEMORY_VOLATILE_TTL (2<<8)
#define MAXMEMORY_VOLATILE_RANDOM (3<<8)
#define MAXMEMORY_ALLKEYS_LRU ((4<<8)|MAXMEMORY_FLAG_LRU)
#define MAXMEMORY_ALLKEYS_LFU ((5<<8)|MAXMEMORY_FLAG_LFU)
#define MAXMEMORY_ALLKEYS_RANDOM (6<<8)
#define MAXMEMORY_ALLKEYS_LRU ((4<<8)|MAXMEMORY_FLAG_LRU|MAXMEMORY_FLAG_ALLKEYS)
#define MAXMEMORY_ALLKEYS_LFU ((5<<8)|MAXMEMORY_FLAG_LFU|MAXMEMORY_FLAG_ALLKEYS)
#define MAXMEMORY_ALLKEYS_RANDOM ((6<<8)|MAXMEMORY_FLAG_ALLKEYS)
#define MAXMEMORY_NO_EVICTION (7<<8)
#define CONFIG_DEFAULT_MAXMEMORY_POLICY MAXMEMORY_NO_EVICTION