#define REDIS_SHARED_INTEGERS 10000
#define REDIS_REPLY_CHUNK_BYTES (16*1024) /* 16k output buffer */
#define REDIS_MAX_LOGMSG_LEN 1024 /* Default maximum length of syslog messages */
-#define REDIS_AUTO_AOFREWRITE_PERC 100
-#define REDIS_AUTO_AOFREWRITE_MIN_SIZE (1024*1024)
-#define REDIS_AOFREWRITE_ITEMS_PER_CMD 64
+#define REDIS_AOF_REWRITE_PERC 100
+#define REDIS_AOF_REWRITE_MIN_SIZE (1024*1024)
+#define REDIS_AOF_REWRITE_ITEMS_PER_CMD 64
#define REDIS_SLOWLOG_LOG_SLOWER_THAN 10000
#define REDIS_SLOWLOG_MAX_LEN 64
#define REDIS_MAX_CLIENTS 10000
#define REDIS_RDB_ENC_INT32 2 /* 32 bit signed integer */
#define REDIS_RDB_ENC_LZF 3 /* string compressed with FASTLZ */
+/* AOF states */
+#define REDIS_AOF_OFF 0 /* AOF is off */
+#define REDIS_AOF_ON 1 /* AOF is on */
+#define REDIS_AOF_WAIT_REWRITE 2 /* AOF waits rewrite to start appending */
+
/* Client flags */
#define REDIS_SLAVE 1 /* This client is a slave server */
#define REDIS_MASTER 2 /* This client is a master server */
#define ZSKIPLIST_P 0.25 /* Skiplist P = 1/4 */
/* Append only defines */
-#define APPENDFSYNC_NO 0
-#define APPENDFSYNC_ALWAYS 1
-#define APPENDFSYNC_EVERYSEC 2
+#define AOF_FSYNC_NO 0
+#define AOF_FSYNC_ALWAYS 1
+#define AOF_FSYNC_EVERYSEC 2
/* Zip structure related defaults */
#define REDIS_HASH_MAX_ZIPMAP_ENTRIES 512
redisDb *db;
dict *commands; /* Command table hahs table */
aeEventLoop *el;
+ unsigned lruclock:22; /* Clock incrementing every minute, for LRU */
+ unsigned lruclock_padding:10;
+ int shutdown_asap; /* SHUTDOWN needed ASAP */
+ int activerehashing; /* Incremental rehash in serverCron() */
+ char *requirepass; /* Pass for AUTH command, or NULL */
+ char *pidfile; /* PID file path */
/* Networking */
- int port;
- char *bindaddr;
- char *unixsocket;
- mode_t unixsocketperm;
- int ipfd;
- int sofd;
- int cfd;
- list *clients;
- list *slaves, *monitors;
- char neterr[ANET_ERR_LEN];
+ int port; /* TCP listening port */
+ char *bindaddr; /* Bind address or NULL */
+ char *unixsocket; /* UNIX socket path */
+ mode_t unixsocketperm; /* UNIX socket permission */
+ int ipfd; /* TCP socket file descriptor */
+ int sofd; /* Unix socket file descriptor */
+ int cfd; /* Cluster bus lisetning socket */
+ list *clients; /* List of active clients */
+ list *slaves, *monitors; /* List of slaves and MONITORs */
+ char neterr[ANET_ERR_LEN]; /* Error buffer for anet.c */
/* RDB / AOF loading information */
- int loading;
+ int loading; /* We are loading data from disk if true */
off_t loading_total_bytes;
off_t loading_loaded_bytes;
time_t loading_start_time;
/* Fast pointers to often looked up command */
struct redisCommand *delCommand, *multiCommand;
- int cronloops; /* number of times the cron function run */
+ int cronloops; /* Number of times the cron function run */
time_t lastsave; /* Unix time of last save succeeede */
/* Fields used only for stats */
- time_t stat_starttime; /* server start time */
- 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 */
- size_t stat_peak_memory; /* max used memory record */
- long long stat_fork_time; /* time needed to perform latets fork() */
- long long stat_rejected_conn; /* clients rejected because of maxclients */
- list *slowlog;
- long long slowlog_entry_id;
- long long slowlog_log_slower_than;
- unsigned long slowlog_max_len;
+ time_t stat_starttime; /* Server start time */
+ 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 */
+ size_t stat_peak_memory; /* Max used memory record */
+ long long stat_fork_time; /* Time needed to perform latets fork() */
+ long long stat_rejected_conn; /* Clients rejected because of maxclients */
+ list *slowlog; /* SLOWLOG list of commands */
+ long long slowlog_entry_id; /* SLOWLOG current entry ID */
+ long long slowlog_log_slower_than; /* SLOWLOG time limit (to get logged) */
+ unsigned long slowlog_max_len; /* SLOWLOG max number of items logged */
/* Configuration */
- int verbosity;
- int maxidletime;
- size_t client_max_querybuf_len;
- int dbnum;
- int daemonize;
- int appendonly;
- int appendfsync;
- int no_appendfsync_on_rewrite;
- int auto_aofrewrite_perc; /* Rewrite AOF if % growth is > M and... */
- off_t auto_aofrewrite_min_size; /* the AOF file is at least N bytes. */
- off_t auto_aofrewrite_base_size;/* AOF size on latest startup or rewrite. */
- off_t appendonly_current_size; /* AOF current size. */
- int aofrewrite_scheduled; /* Rewrite once BGSAVE terminates. */
- int shutdown_asap; /* SHUTDOWN needed */
- 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;
- time_t aof_flush_postponed_start;
- char *pidfile;
- pid_t bgsavechildpid;
- pid_t bgrewritechildpid;
- 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 *dbfilename;
- int rdbcompression;
- char *appendfilename;
+ int verbosity; /* Loglevel in redis.conf */
+ int maxidletime; /* Client timeout in seconds */
+ size_t client_max_querybuf_len; /* Limit for client query buffer length */
+ int dbnum; /* Total number of configured DBs */
+ int daemonize; /* True if running as a daemon */
+ /* AOF persistence */
+ int aof_state; /* REDIS_AOF_(ON|OFF|WAIT_REWRITE) */
+ int aof_fsync; /* Kind of fsync() policy */
+ char *aof_filename; /* Name of the AOF file */
+ int aof_no_fsync_on_rewrite; /* Don't fsync if a rewrite is in prog. */
+ int aof_rewrite_perc; /* Rewrite AOF if % growth is > M and... */
+ off_t aof_rewrite_min_size; /* the AOF file is at least N bytes. */
+ off_t aof_rewrite_base_size; /* AOF size on latest startup or rewrite. */
+ off_t aof_current_size; /* AOF current size. */
+ int aof_rewrite_scheduled; /* Rewrite once BGSAVE terminates. */
+ pid_t aof_child_pid; /* PID if rewriting process */
+ sds aof_rewrite_buf; /* buffer taken by parent during oppend only rewrite */
+ sds aof_buf; /* AOF buffer, written before entering the event loop */
+ int aof_fd; /* File descriptor of currently selected AOF file */
+ int aof_selected_db; /* Currently selected DB in AOF */
+ time_t aof_flush_postponed_start; /* UNIX time of postponed AOF flush */
+ time_t aof_last_fsync; /* UNIX time of last fsync() */
+ /* RDB persistence */
+ long long dirty; /* Changes to DB from the last save */
+ long long dirty_before_bgsave; /* Used to restore dirty on failed BGSAVE */
+ pid_t rdb_child_pid; /* PID of RDB saving child */
+ struct saveparam *saveparams; /* Save points array for RDB */
+ int saveparamslen; /* Number of saving points */
+ char *rdb_filename; /* Name of RDB file */
+ int rdb_compression; /* Use compression in RDB? */
/* Logging */
- char *logfile;
- int syslog_enabled;
- char *syslog_ident;
- int syslog_facility;
- /* Replication related */
- int isslave;
+ char *logfile; /* Path of log file */
+ int syslog_enabled; /* Is syslog enabled? */
+ char *syslog_ident; /* Syslog ident */
+ int syslog_facility; /* Syslog facility */
/* Slave specific fields */
- char *masterauth;
- char *masterhost;
- int masterport;
- int repl_ping_slave_period;
- int repl_timeout;
- redisClient *master; /* client that is master for this slave */
- int repl_syncio_timeout; /* timeout for synchronous I/O calls */
- int replstate; /* replication status if the instance is a slave */
- off_t repl_transfer_left; /* bytes left reading .rdb */
- int repl_transfer_s; /* slave -> master SYNC socket */
- int repl_transfer_fd; /* slave -> master SYNC temp file descriptor */
- char *repl_transfer_tmpfile; /* slave-> master SYNC temp file name */
- time_t repl_transfer_lastio; /* unix time of the latest read, for timeout */
+ char *masterauth; /* AUTH with this password with master */
+ char *masterhost; /* Hostname of master */
+ int masterport; /* Port of master */
+ int repl_ping_slave_period; /* Master pings the salve every N seconds */
+ int repl_timeout; /* Timeout after N seconds of master idle */
+ redisClient *master; /* Client that is master for this slave */
+ int repl_syncio_timeout; /* Timeout for synchronous I/O calls */
+ int repl_state; /* Replication status if the instance is a slave */
+ off_t repl_transfer_left; /* Bytes left reading .rdb */
+ int repl_transfer_s; /* Slave -> Master SYNC socket */
+ int repl_transfer_fd; /* Slave -> Master SYNC temp file descriptor */
+ char *repl_transfer_tmpfile; /* Slave-> master SYNC temp file name */
+ time_t repl_transfer_lastio; /* Unix time of the latest read, for timeout */
int repl_serve_stale_data; /* Serve stale data when link is down? */
- time_t repl_down_since; /* unix time at which link with master went down */
+ time_t repl_down_since; /* Unix time at which link with master went down */
/* Limits */
- unsigned int maxclients;
- unsigned long long maxmemory;
- int maxmemory_policy;
- int maxmemory_samples;
+ unsigned int maxclients; /* Max number of simultaneous clients */
+ unsigned long long maxmemory; /* Max number of memory bytes to use */
+ int maxmemory_policy; /* Policy for key evition */
+ int maxmemory_samples; /* Pricision of random sampling */
/* Blocked clients */
- unsigned int bpop_blocked_clients;
+ unsigned int bpop_blocked_clients; /* Number of clients blocked by lists */
list *unblocked_clients; /* list of clients to unblock before next loop */
/* 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;
- /* Zip structure config */
+ /* Zip structure config, see redis.conf for more information */
size_t hash_max_zipmap_entries;
size_t hash_max_zipmap_value;
size_t list_max_ziplist_entries;
size_t set_max_intset_entries;
size_t zset_max_ziplist_entries;
size_t zset_max_ziplist_value;
- time_t unixtime; /* Unix time sampled every second. */
+ time_t unixtime; /* Unix time sampled every second. */
/* Pubsub */
- dict *pubsub_channels; /* Map channels to list of subscribed clients */
- list *pubsub_patterns; /* A list of pubsub_patterns */
- /* Misc */
- unsigned lruclock:22; /* clock incrementing every minute, for LRU */
- unsigned lruclock_padding:10;
+ dict *pubsub_channels; /* Map channels to list of subscribed clients */
+ list *pubsub_patterns; /* A list of pubsub_patterns */
/* Cluster */
- int cluster_enabled;
- clusterState cluster;
+ int cluster_enabled; /* Is cluster enabled? */
+ clusterState cluster; /* State of the cluster */
/* Scripting */
lua_State *lua; /* The Lua interpreter. We use just one for all clients */
- redisClient *lua_client; /* The "fake client" to query Redis from Lua */
- redisClient *lua_caller; /* The client running EVAL right now, or NULL */
- dict *lua_scripts; /* A dictionary of SHA1 -> Lua scripts */
- long long lua_time_limit;
- long long lua_time_start;
+ redisClient *lua_client; /* The "fake client" to query Redis from Lua */
+ redisClient *lua_caller; /* The client running EVAL right now, or NULL */
+ dict *lua_scripts; /* A dictionary of SHA1 -> Lua scripts */
+ long long lua_time_limit; /* Script timeout in seconds */
+ long long lua_time_start; /* Start time of script */
int lua_write_dirty; /* True if a write command was called during the
execution of the current script. */
int lua_random_dirty; /* True if a random command was called during the
char *assert_failed;
char *assert_file;
int assert_line;
- int bug_report_start; /* True if bug report header already logged. */
+ int bug_report_start; /* True if bug report header was already logged. */
};
typedef struct pubsubPattern {
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