profiling information in INFO

[redis.git] / src / redis.h

diff --git a/src/redis.h b/src/redis.h
index 4a6af106b92b3a4168b2a09062a1bcc0c09d35de..67efeeb0449731e0b155176c5d93a3b0fb58fecf 100644 (file)
--- a/src/redis.h
+++ b/src/redis.h
@@ -17,6 +17,7 @@
 #include <errno.h>
 #include <inttypes.h>
 #include <pthread.h>
 #include <errno.h>
 #include <inttypes.h>
 #include <pthread.h>

+#include <syslog.h>

 
 #include "ae.h"     /* Event driven programming library */
 #include "sds.h"    /* Dynamic safe strings */
 
 #include "ae.h"     /* Event driven programming library */
 #include "sds.h"    /* Dynamic safe strings */


@@ -47,11 +48,7 @@
 #define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
 #define REDIS_SHARED_INTEGERS 10000
 #define REDIS_REPLY_CHUNK_BYTES (5*1500) /* 5 TCP packets with default MTU */
 #define REDIS_REQUEST_MAX_SIZE (1024*1024*256) /* max bytes in inline command */
 #define REDIS_SHARED_INTEGERS 10000
 #define REDIS_REPLY_CHUNK_BYTES (5*1500) /* 5 TCP packets with default MTU */

-
-/* If more then REDIS_WRITEV_THRESHOLD write packets are pending use writev */
-#define REDIS_WRITEV_THRESHOLD      3
-/* Max number of iovecs used for each writev call */
-#define REDIS_WRITEV_IOVEC_COUNT    256
+#define REDIS_MAX_LOGMSG_LEN    1024 /* Default maximum length of syslog messages */

 
 /* Hash table parameters */
 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */
 
 /* Hash table parameters */
 #define REDIS_HT_MINFILL        10      /* Minimal hash table fill 10% */


@@ -117,23 +114,18 @@
 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 
 #define REDIS_RDB_ENC_INT32 2       /* 32 bit signed integer */
 #define REDIS_RDB_ENC_LZF 3         /* string compressed with FASTLZ */
 

-/* Virtual memory object->where field. */
-#define REDIS_VM_MEMORY 0       /* The object is on memory */
-#define REDIS_VM_SWAPPED 1      /* The object is on disk */
-#define REDIS_VM_SWAPPING 2     /* Redis is swapping this object on disk */
-#define REDIS_VM_LOADING 3      /* Redis is loading this object from disk */
-
-/* Virtual memory static configuration stuff.
- * Check vmFindContiguousPages() to know more about this magic numbers. */
-#define REDIS_VM_MAX_NEAR_PAGES 65536
-#define REDIS_VM_MAX_RANDOM_JUMP 4096
-#define REDIS_VM_MAX_THREADS 32
-#define REDIS_THREAD_STACK_SIZE (1024*1024*4)
-/* The following is the *percentage* of completed I/O jobs to process when the
- * handelr is called. While Virtual Memory I/O operations are performed by
- * threads, this operations must be processed by the main thread when completed
- * in order to take effect. */
+/* Scheduled IO opeations flags. */
+#define REDIS_IO_LOAD 1
+#define REDIS_IO_SAVE 2
+#define REDIS_IO_LOADINPROG 4
+#define REDIS_IO_SAVEINPROG 8
+
+/* Generic IO flags */
+#define REDIS_IO_ONLYLOADS 1
+#define REDIS_IO_ASAP 2
+

 #define REDIS_MAX_COMPLETED_JOBS_PROCESSED 1
 #define REDIS_MAX_COMPLETED_JOBS_PROCESSED 1

+#define REDIS_THREAD_STACK_SIZE (1024*1024*4)

 
 /* Client flags */
 #define REDIS_SLAVE 1       /* This client is a slave server */
 
 /* Client flags */
 #define REDIS_SLAVE 1       /* This client is a slave server */


@@ -144,6 +136,8 @@
 #define REDIS_IO_WAIT 32    /* The client is waiting for Virtual Memory I/O */
 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */
 #define REDIS_IO_WAIT 32    /* The client is waiting for Virtual Memory I/O */
 #define REDIS_DIRTY_CAS 64  /* Watched keys modified. EXEC will fail. */
 #define REDIS_CLOSE_AFTER_REPLY 128 /* Close after writing entire reply. */

+#define REDIS_UNBLOCKED 256 /* This client was unblocked and is stored in
+                               server.unblocked_clients */

 
 /* Client request types */
 #define REDIS_REQ_INLINE 1
 
 /* Client request types */
 #define REDIS_REQ_INLINE 1


@@ -192,11 +186,11 @@
 #define APPENDFSYNC_EVERYSEC 2
 
 /* Zip structure related defaults */
 #define APPENDFSYNC_EVERYSEC 2
 
 /* Zip structure related defaults */

-#define REDIS_HASH_MAX_ZIPMAP_ENTRIES 64
-#define REDIS_HASH_MAX_ZIPMAP_VALUE 512
-#define REDIS_LIST_MAX_ZIPLIST_ENTRIES 1024
-#define REDIS_LIST_MAX_ZIPLIST_VALUE 32
-#define REDIS_SET_MAX_INTSET_ENTRIES 4096
+#define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
+#define REDIS_HASH_MAX_ZIPMAP_VALUE 64
+#define REDIS_LIST_MAX_ZIPLIST_ENTRIES 512
+#define REDIS_LIST_MAX_ZIPLIST_VALUE 64
+#define REDIS_SET_MAX_INTSET_ENTRIES 512

 
 /* Sets operations codes */
 #define REDIS_OP_UNION 0
 
 /* Sets operations codes */
 #define REDIS_OP_UNION 0


@@ -211,6 +205,12 @@
 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 #define REDIS_MAXMEMORY_NO_EVICTION 5
 
 #define REDIS_MAXMEMORY_ALLKEYS_RANDOM 4
 #define REDIS_MAXMEMORY_NO_EVICTION 5
 

+/* Diskstore background saving thread states */
+#define REDIS_BGSAVE_THREAD_UNACTIVE 0
+#define REDIS_BGSAVE_THREAD_ACTIVE 1
+#define REDIS_BGSAVE_THREAD_DONE_OK 2
+#define REDIS_BGSAVE_THREAD_DONE_ERR 3
+

 /* We can print the stacktrace, so our assert is defined this way: */
 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)
 /* We can print the stacktrace, so our assert is defined this way: */
 #define redisAssert(_e) ((_e)?(void)0 : (_redisAssert(#_e,__FILE__,__LINE__),_exit(1)))
 #define redisPanic(_e) _redisPanic(#_e,__FILE__,__LINE__),_exit(1)


@@ -228,7 +228,7 @@ void _redisPanic(char *msg, char *file, int line);
 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 typedef struct redisObject {
     unsigned type:4;
 #define REDIS_LRU_CLOCK_RESOLUTION 10 /* LRU clock resolution in seconds */
 typedef struct redisObject {
     unsigned type:4;

-    unsigned storage:2;     /* REDIS_VM_MEMORY or REDIS_VM_SWAPPING */
+    unsigned notused:2;     /* Not used */

     unsigned encoding:4;
     unsigned lru:22;        /* lru time (relative to server.lruclock) */
     int refcount;
     unsigned encoding:4;
     unsigned lru:22;        /* lru time (relative to server.lruclock) */
     int refcount;


@@ -269,14 +269,15 @@ typedef struct vmPointer {
     _var.type = REDIS_STRING; \
     _var.encoding = REDIS_ENCODING_RAW; \
     _var.ptr = _ptr; \
     _var.type = REDIS_STRING; \
     _var.encoding = REDIS_ENCODING_RAW; \
     _var.ptr = _ptr; \

-    _var.storage = REDIS_VM_MEMORY; \

 } while(0);
 
 typedef struct redisDb {
     dict *dict;                 /* The keyspace for this DB */
     dict *expires;              /* Timeout of keys with a timeout set */
     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */
 } while(0);
 
 typedef struct redisDb {
     dict *dict;                 /* The keyspace for this DB */
     dict *expires;              /* Timeout of keys with a timeout set */
     dict *blocking_keys;        /* Keys with clients waiting for data (BLPOP) */

-    dict *io_keys;              /* Keys with clients waiting for VM I/O */
+    dict *io_keys;              /* Keys with clients waiting for DS I/O */
+    dict *io_negcache;          /* Negative caching for disk store */
+    dict *io_queued;            /* Queued IO operations hash table */

     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
     int id;
 } redisDb;
     dict *watched_keys;         /* WATCHED keys for MULTI/EXEC CAS */
     int id;
 } redisDb;


@@ -357,17 +358,20 @@ struct sharedObjectsStruct {
 
 /* Global server state structure */
 struct redisServer {
 
 /* Global server state structure */
 struct redisServer {

+    /* General */

     pthread_t mainthread;
     pthread_t mainthread;

+    redisDb *db;
+    dict *commands;             /* Command table hahs table */
+    aeEventLoop *el;
+    /* Networking */

     int port;
     char *bindaddr;
     char *unixsocket;
     int ipfd;
     int sofd;
     int port;
     char *bindaddr;
     char *unixsocket;
     int ipfd;
     int sofd;

-    redisDb *db;
-    long long dirty;            /* changes to DB from the last save */
-    long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */

     list *clients;
     list *clients;

-    dict *commands;             /* Command table hahs table */
+    list *slaves, *monitors;
+    char neterr[ANET_ERR_LEN];

     /* RDB / AOF loading information */
     int loading;
     off_t loading_total_bytes;
     /* RDB / AOF loading information */
     int loading;
     off_t loading_total_bytes;


@@ -375,9 +379,6 @@ struct redisServer {
     time_t loading_start_time;
     /* Fast pointers to often looked up command */
     struct redisCommand *delCommand, *multiCommand;
     time_t loading_start_time;
     /* Fast pointers to often looked up command */
     struct redisCommand *delCommand, *multiCommand;

-    list *slaves, *monitors;
-    char neterr[ANET_ERR_LEN];
-    aeEventLoop *el;

     int cronloops;              /* number of times the cron function run */
     time_t lastsave;                /* Unix time of last save succeeede */
     /* Fields used only for stats */
     int cronloops;              /* number of times the cron function run */
     time_t lastsave;                /* Unix time of last save succeeede */
     /* Fields used only for stats */


@@ -385,11 +386,11 @@ struct redisServer {
     long long stat_numcommands;     /* number of processed commands */
     long long stat_numconnections;  /* number of connections received */
     long long stat_expiredkeys;     /* number of expired keys */
     long long stat_numcommands;     /* number of processed commands */
     long long stat_numconnections;  /* number of connections received */
     long long stat_expiredkeys;     /* number of expired keys */

+    long long stat_evictedkeys;     /* number of evicted keys (maxmemory) */

     long long stat_keyspace_hits;   /* number of successful lookups of keys */
     long long stat_keyspace_misses; /* number of failed lookups of keys */
     /* Configuration */
     int verbosity;
     long long stat_keyspace_hits;   /* number of successful lookups of keys */
     long long stat_keyspace_misses; /* number of failed lookups of keys */
     /* Configuration */
     int verbosity;

-    int glueoutputbuf;

     int maxidletime;
     int dbnum;
     int daemonize;
     int maxidletime;
     int dbnum;
     int daemonize;


@@ -397,22 +398,32 @@ struct redisServer {
     int appendfsync;
     int no_appendfsync_on_rewrite;
     int shutdown_asap;
     int appendfsync;
     int no_appendfsync_on_rewrite;
     int shutdown_asap;

+    int activerehashing;
+    char *requirepass;
+    /* Persistence */
+    long long dirty;            /* changes to DB from the last save */
+    long long dirty_before_bgsave; /* used to restore dirty on failed BGSAVE */

     time_t lastfsync;
     int appendfd;
     int appendseldb;
     char *pidfile;
     pid_t bgsavechildpid;
     pid_t bgrewritechildpid;
     time_t lastfsync;
     int appendfd;
     int appendseldb;
     char *pidfile;
     pid_t bgsavechildpid;
     pid_t bgrewritechildpid;

+    int bgsavethread_state;
+    pthread_mutex_t bgsavethread_mutex;
+    pthread_t bgsavethread;

     sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
     sds aofbuf;       /* AOF buffer, written before entering the event loop */
     struct saveparam *saveparams;
     int saveparamslen;
     sds bgrewritebuf; /* buffer taken by parent during oppend only rewrite */
     sds aofbuf;       /* AOF buffer, written before entering the event loop */
     struct saveparam *saveparams;
     int saveparamslen;

-    char *logfile;

     char *dbfilename;
     char *dbfilename;

-    char *appendfilename;
-    char *requirepass;

     int rdbcompression;
     int rdbcompression;

-    int activerehashing;
+    char *appendfilename;
+    /* Logging */
+    char *logfile;
+    int syslog_enabled;
+    char *syslog_ident;
+    int syslog_facility;

     /* Replication related */
     int isslave;
     /* Slave specific fields */
     /* Replication related */
     int isslave;
     /* Slave specific fields */


@@ -434,31 +445,25 @@ struct redisServer {
     int maxmemory_samples;
     /* Blocked clients */
     unsigned int bpop_blocked_clients;
     int maxmemory_samples;
     /* Blocked clients */
     unsigned int bpop_blocked_clients;

-    unsigned int vm_blocked_clients;
-    list *unblocked_clients;
+    unsigned int cache_blocked_clients;
+    list *unblocked_clients; /* list of clients to unblock before next loop */
+    list *cache_io_queue;    /* IO operations queue */
+    int cache_flush_delay;   /* seconds to wait before flushing keys */

     /* Sort parameters - qsort_r() is only available under BSD so we
      * have to take this state global, in order to pass it to sortCompare() */
     int sort_desc;
     int sort_alpha;
     int sort_bypattern;
     /* Virtual memory configuration */
     /* Sort parameters - qsort_r() is only available under BSD so we
      * have to take this state global, in order to pass it to sortCompare() */
     int sort_desc;
     int sort_alpha;
     int sort_bypattern;
     /* Virtual memory configuration */

-    int vm_enabled;
-    char *vm_swap_file;
-    off_t vm_page_size;
-    off_t vm_pages;
-    unsigned long long vm_max_memory;
+    int ds_enabled; /* backend disk in redis.conf */
+    char *ds_path;  /* location of the disk store on disk */
+    unsigned long long cache_max_memory;

     /* Zip structure config */
     size_t hash_max_zipmap_entries;
     size_t hash_max_zipmap_value;
     size_t list_max_ziplist_entries;
     size_t list_max_ziplist_value;
     size_t set_max_intset_entries;
     /* Zip structure config */
     size_t hash_max_zipmap_entries;
     size_t hash_max_zipmap_value;
     size_t list_max_ziplist_entries;
     size_t list_max_ziplist_value;
     size_t set_max_intset_entries;

-    /* Virtual memory state */
-    FILE *vm_fp;
-    int vm_fd;
-    off_t vm_next_page; /* Next probably empty page */
-    off_t vm_near_pages; /* Number of pages allocated sequentially */
-    unsigned char *vm_bitmap; /* Bitmap of free/used pages */

     time_t unixtime;    /* Unix time sampled every second. */
     /* Virtual memory I/O threads stuff */
     /* An I/O thread process an element taken from the io_jobs queue and
     time_t unixtime;    /* Unix time sampled every second. */
     /* Virtual memory I/O threads stuff */
     /* An I/O thread process an element taken from the io_jobs queue and


@@ -469,7 +474,7 @@ struct redisServer {
     list *io_processed; /* List of VM I/O jobs already processed */
     list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
     pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */
     list *io_processed; /* List of VM I/O jobs already processed */
     list *io_ready_clients; /* Clients ready to be unblocked. All keys loaded */
     pthread_mutex_t io_mutex; /* lock to access io_jobs/io_done/io_thread_job */

-    pthread_mutex_t io_swapfile_mutex; /* So we can lseek + write */
+    pthread_cond_t io_condvar; /* I/O threads conditional variable */

     pthread_attr_t io_threads_attr; /* attributes for threads creation */
     int io_active_threads; /* Number of running I/O threads */
     int vm_max_threads; /* Max number of I/O threads running at the same time */
     pthread_attr_t io_threads_attr; /* attributes for threads creation */
     int io_active_threads; /* Number of running I/O threads */
     int vm_max_threads; /* Max number of I/O threads running at the same time */


@@ -512,6 +517,7 @@ struct redisCommand {
     int vm_firstkey; /* The first argument that's a key (0 = no keys) */
     int vm_lastkey;  /* THe last argument that's a key */
     int vm_keystep;  /* The step between first and last key */
     int vm_firstkey; /* The first argument that's a key (0 = no keys) */
     int vm_lastkey;  /* THe last argument that's a key */
     int vm_keystep;  /* The step between first and last key */

+    long long microseconds;

 };
 
 struct redisFunctionSym {
 };
 
 struct redisFunctionSym {


@@ -554,25 +560,27 @@ typedef struct zset {
     zskiplist *zsl;
 } zset;
 
     zskiplist *zsl;
 } zset;
 

-/* VM threaded I/O request message */
-#define REDIS_IOJOB_LOAD 0          /* Load from disk to memory */
-#define REDIS_IOJOB_PREPARE_SWAP 1  /* Compute needed pages */
-#define REDIS_IOJOB_DO_SWAP 2       /* Swap from memory to disk */
+/* DIsk store threaded I/O request message */
+#define REDIS_IOJOB_LOAD 0
+#define REDIS_IOJOB_SAVE 1
+

 typedef struct iojob {
     int type;   /* Request type, REDIS_IOJOB_* */
     redisDb *db;/* Redis database */
 typedef struct iojob {
     int type;   /* Request type, REDIS_IOJOB_* */
     redisDb *db;/* Redis database */

-    robj *key;  /* This I/O request is about swapping this key */
-    robj *id;   /* Unique identifier of this job:
-                   this is the object to swap for REDIS_IOREQ_*_SWAP, or the
-                   vmpointer objct for REDIS_IOREQ_LOAD. */
-    robj *val;  /* the value to swap for REDIS_IOREQ_*_SWAP, otherwise this
-                 * field is populated by the I/O thread for REDIS_IOREQ_LOAD. */
-    off_t page; /* Swap page where to read/write the object */
-    off_t pages; /* Swap pages needed to save object. PREPARE_SWAP return val */
-    int canceled; /* True if this command was canceled by blocking side of VM */
-    pthread_t thread; /* ID of the thread processing this entry */
+    robj *key;  /* This I/O request is about this key */
+    robj *val;  /* the value to swap for REDIS_IOJOB_SAVE, otherwise this
+                 * field is populated by the I/O thread for REDIS_IOJOB_LOAD. */
+    time_t expire; /* Expire time for this key on REDIS_IOJOB_LOAD */

 } iojob;
 
 } iojob;
 

+/* IO operations scheduled -- check dscache.c for more info */
+typedef struct ioop {
+    int type;
+    redisDb *db;
+    robj *key;
+    time_t ctime; /* This is the creation time of the entry. */
+} ioop;
+

 /* Structure to hold list iteration abstraction. */
 typedef struct {
     robj *subject;
 /* Structure to hold list iteration abstraction. */
 typedef struct {
     robj *subject;


@@ -635,7 +643,6 @@ void closeTimedoutClients(void);
 void freeClient(redisClient *c);
 void resetClient(redisClient *c);
 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);
 void freeClient(redisClient *c);
 void resetClient(redisClient *c);
 void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask);

-void sendReplyToClientWritev(aeEventLoop *el, int fd, void *privdata, int mask);

 void addReply(redisClient *c, robj *obj);
 void *addDeferredMultiBulkLength(redisClient *c);
 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);
 void addReply(redisClient *c, robj *obj);
 void *addDeferredMultiBulkLength(redisClient *c);
 void setDeferredMultiBulkLength(redisClient *c, void *node, long length);


@@ -657,6 +664,8 @@ void addReplyDouble(redisClient *c, double d);
 void addReplyLongLong(redisClient *c, long long ll);
 void addReplyMultiBulkLen(redisClient *c, long length);
 void *dupClientReplyValue(void *o);
 void addReplyLongLong(redisClient *c, long long ll);
 void addReplyMultiBulkLen(redisClient *c, long length);
 void *dupClientReplyValue(void *o);

+void getClientsMaxBuffers(unsigned long *longest_output_list,
+                          unsigned long *biggest_input_buffer);

 
 #ifdef __GNUC__
 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)
 
 #ifdef __GNUC__
 void addReplyErrorFormat(redisClient *c, const char *fmt, ...)


@@ -754,7 +763,13 @@ int rdbSaveObject(FILE *fp, robj *o);
 off_t rdbSavedObjectLen(robj *o);
 off_t rdbSavedObjectPages(robj *o);
 robj *rdbLoadObject(int type, FILE *fp);
 off_t rdbSavedObjectLen(robj *o);
 off_t rdbSavedObjectPages(robj *o);
 robj *rdbLoadObject(int type, FILE *fp);

-void backgroundSaveDoneHandler(int statloc);
+void backgroundSaveDoneHandler(int exitcode, int bysignal);
+int rdbSaveKeyValuePair(FILE *fp, redisDb *db, robj *key, robj *val, time_t now);
+int rdbLoadType(FILE *fp);
+time_t rdbLoadTime(FILE *fp);
+robj *rdbLoadStringObject(FILE *fp);
+int rdbSaveType(FILE *fp, unsigned char type);
+int rdbSaveLen(FILE *fp, uint32_t len);

 
 /* AOF persistence */
 void flushAppendOnlyFile(void);
 
 /* AOF persistence */
 void flushAppendOnlyFile(void);


@@ -764,7 +779,7 @@ int rewriteAppendOnlyFileBackground(void);
 int loadAppendOnlyFile(char *filename);
 void stopAppendOnly(void);
 int startAppendOnly(void);
 int loadAppendOnlyFile(char *filename);
 void stopAppendOnly(void);
 int startAppendOnly(void);

-void backgroundRewriteDoneHandler(int statloc);
+void backgroundRewriteDoneHandler(int exitcode, int bysignal);

 
 /* Sorted sets data type */
 zskiplist *zslCreate(void);
 
 /* Sorted sets data type */
 zskiplist *zslCreate(void);


@@ -786,32 +801,41 @@ int htNeedsResize(dict *dict);
 void oom(const char *msg);
 void populateCommandTable(void);
 
 void oom(const char *msg);
 void populateCommandTable(void);
 

-/* Virtual Memory */
-void vmInit(void);
-void vmMarkPagesFree(off_t page, off_t count);
-robj *vmLoadObject(robj *o);
-robj *vmPreviewObject(robj *o);
-int vmSwapOneObjectBlocking(void);
-int vmSwapOneObjectThreaded(void);
-int vmCanSwapOut(void);
+/* Disk store */
+int dsOpen(void);
+int dsClose(void);
+int dsSet(redisDb *db, robj *key, robj *val);
+robj *dsGet(redisDb *db, robj *key, time_t *expire);
+int dsDel(redisDb *db, robj *key);
+int dsExists(redisDb *db, robj *key);
+void dsFlushDb(int dbid);
+int dsRdbSaveBackground(char *filename);
+int dsRdbSave(char *filename);
+
+/* Disk Store Cache */
+void dsInit(void);

 void vmThreadedIOCompletedJob(aeEventLoop *el, int fd, void *privdata, int mask);
 void vmThreadedIOCompletedJob(aeEventLoop *el, int fd, void *privdata, int mask);

-void vmCancelThreadedIOJob(robj *o);

 void lockThreadedIO(void);
 void unlockThreadedIO(void);
 void lockThreadedIO(void);
 void unlockThreadedIO(void);

-int vmSwapObjectThreaded(robj *key, robj *val, redisDb *db);

 void freeIOJob(iojob *j);
 void queueIOJob(iojob *j);
 void freeIOJob(iojob *j);
 void queueIOJob(iojob *j);

-int vmWriteObjectOnSwap(robj *o, off_t page);
-robj *vmReadObjectFromSwap(off_t page, int type);

 void waitEmptyIOJobsQueue(void);
 void waitEmptyIOJobsQueue(void);

-void vmReopenSwapFile(void);
-int vmFreePage(off_t page);
+void processAllPendingIOJobs(void);

 void zunionInterBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
 void execBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
 int blockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd);
 int dontWaitForSwappedKey(redisClient *c, robj *key);
 void handleClientsBlockedOnSwappedKey(redisDb *db, robj *key);
 void zunionInterBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
 void execBlockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd, int argc, robj **argv);
 int blockClientOnSwappedKeys(redisClient *c, struct redisCommand *cmd);
 int dontWaitForSwappedKey(redisClient *c, robj *key);
 void handleClientsBlockedOnSwappedKey(redisDb *db, robj *key);

-vmpointer *vmSwapObjectBlocking(robj *val);
+int cacheFreeOneEntry(void);
+void cacheScheduleIOAddFlag(redisDb *db, robj *key, long flag);
+void cacheScheduleIODelFlag(redisDb *db, robj *key, long flag);
+int cacheScheduleIOGetFlags(redisDb *db, robj *key);
+void cacheScheduleIO(redisDb *db, robj *key, int type);
+void cacheCron(void);
+int cacheKeyMayExist(redisDb *db, robj *key);
+void cacheSetKeyMayExist(redisDb *db, robj *key);
+void cacheSetKeyDoesNotExist(redisDb *db, robj *key);
+void cacheForcePointInTime(void);

 
 /* Set data type */
 robj *setTypeCreate(robj *value);
 
 /* Set data type */
 robj *setTypeCreate(robj *value);


@@ -882,6 +906,8 @@ robj *dbRandomKey(redisDb *db);
 int dbDelete(redisDb *db, robj *key);
 long long emptyDb();
 int selectDb(redisClient *c, int id);
 int dbDelete(redisDb *db, robj *key);
 long long emptyDb();
 int selectDb(redisClient *c, int id);

+void signalModifiedKey(redisDb *db, robj *key);
+void signalFlushedDb(int dbid);

 
 /* Git SHA1 */
 char *redisGitSHA1(void);
 
 /* Git SHA1 */
 char *redisGitSHA1(void);