Provided by: libredis-perl_1.9910-2_all bug

NAME

       Redis - Perl binding for Redis database

VERSION

       version 1.991

SYNOPSIS

           ## Defaults to $ENV{REDIS_SERVER} or 127.0.0.1:6379
           my $redis = Redis->new;

           my $redis = Redis->new(server => 'redis.example.com:8080');

           ## Set the connection name (requires Redis 2.6.9)
           my $redis = Redis->new(
             server => 'redis.example.com:8080',
             name => 'my_connection_name',
           );
           my $generation = 0;
           my $redis = Redis->new(
             server => 'redis.example.com:8080',
             name => sub { "cache-$$-".++$generation },
           );

           ## Use UNIX domain socket
           my $redis = Redis->new(sock => '/path/to/socket');

           ## Enable auto-reconnect
           ## Try to reconnect every 1s up to 60 seconds until success
           ## Die if you can't after that
           my $redis = Redis->new(reconnect => 60, every => 1_000_000);

           ## Try each 100ms up to 2 seconds (every is in microseconds)
           my $redis = Redis->new(reconnect => 2, every => 100_000);

           ## Enable connection timeout (in seconds)
           my $redis = Redis->new(cnx_timeout => 60);

           ## Enable read timeout (in seconds)
           my $redis = Redis->new(read_timeout => 0.5);

           ## Enable write timeout (in seconds)
           my $redis = Redis->new(write_timeout => 1.2);

           ## Connect via a list of Sentinels to a given service
           my $redis = Redis->new(sentinels => [ '127.0.0.1:12345' ], service => 'mymaster');

           ## Same, but with connection, read and write timeout on the sentinel hosts
           my $redis = Redis->new( sentinels => [ '127.0.0.1:12345' ], service => 'mymaster',
                                   sentinels_cnx_timeout => 0.1,
                                   sentinels_read_timeout => 1,
                                   sentinels_write_timeout => 1,
                                 );

           ## Use all the regular Redis commands, they all accept a list of
           ## arguments
           ## See http://redis.io/commands for full list
           $redis->get('key');
           $redis->set('key' => 'value');
           $redis->sort('list', 'DESC');
           $redis->sort(qw{list LIMIT 0 5 ALPHA DESC});

           ## Add a coderef argument to run a command in the background
           $redis->sort(qw{list LIMIT 0 5 ALPHA DESC}, sub {
             my ($reply, $error) = @_;
             die "Oops, got an error: $error\n" if defined $error;
             print "$_\n" for @$reply;
           });
           long_computation();
           $redis->wait_all_responses;
           ## or
           $redis->wait_one_response();

           ## Or run a large batch of commands in a pipeline
           my %hash = _get_large_batch_of_commands();
           $redis->hset('h', $_, $hash{$_}, sub {}) for keys %hash;
           $redis->wait_all_responses;

           ## Publish/Subscribe
           $redis->subscribe(
             'topic_1',
             'topic_2',
             sub {
               my ($message, $topic, $subscribed_topic) = @_

                 ## $subscribed_topic can be different from topic if
                 ## you use psubscribe() with wildcards
             }
           );
           $redis->psubscribe('nasdaq.*', sub {...});

           ## Blocks and waits for messages, calls subscribe() callbacks
           ##  ... forever
           my $timeout = 10;
           $redis->wait_for_messages($timeout) while 1;

           ##  ... until some condition
           my $keep_going = 1; ## other code will set to false to quit
           $redis->wait_for_messages($timeout) while $keep_going;

           $redis->publish('topic_1', 'message');

DESCRIPTION

       Pure perl bindings for <http://redis.io/>

       This version supports protocol 2.x (multi-bulk) or later of Redis available at
       <https://github.com/antirez/redis/>.

       This documentation lists commands which are exercised in test suite, but additional
       commands will work correctly since protocol specifies enough information to support almost
       all commands with same piece of code with a little help of "AUTOLOAD".

PIPELINING

       Usually, running a command will wait for a response.  However, if you're doing large
       numbers of requests, it can be more efficient to use what Redis calls pipelining: send
       multiple commands to Redis without waiting for a response, then wait for the responses
       that come in.

       To use pipelining, add a coderef argument as the last argument to a command method call:

         $r->set('foo', 'bar', sub {});

       Pending responses to pipelined commands are processed in a single batch, as soon as at
       least one of the following conditions holds:

       ·   A non-pipelined (synchronous) command is called on the same connection

       ·   A pub/sub subscription command (one of "subscribe", "unsubscribe", "psubscribe", or
           "punsubscribe") is about to be called on the same connection.

       ·   One of "wait_all_responses" or "wait_one_response" methods is called explicitly.

       The coderef you supply to a pipelined command method is invoked once the response is
       available.  It takes two arguments, $reply and $error.  If $error is defined, it contains
       the text of an error reply sent by the Redis server.  Otherwise, $reply is the non-error
       reply. For almost all commands, that means it's "undef", or a defined but non-reference
       scalar, or an array ref of any of those; but see "keys", "info", and "exec".

       Note the contrast with synchronous commands, which throw an exception on receipt of an
       error reply, or return a non-error reply directly.

       The fact that pipelined commands never throw an exception can be particularly useful for
       Redis transactions; see "exec".

ENCODING

       There is no encoding feature anymore, it has been deprecated and finally removed. This
       module consider that any data sent to the Redis server is a binary data.  And it doesn't
       do anything when getting data from the Redis server.

       So, if you are working with character strings, you should pre-encode or post-decode it if
       needed !

CONSTRUCTOR

   new
           my $r = Redis->new; # $ENV{REDIS_SERVER} or 127.0.0.1:6379

           my $r = Redis->new( server => '192.168.0.1:6379', debug => 0 );
           my $r = Redis->new( server => '192.168.0.1:6379', encoding => undef );
           my $r = Redis->new( sock => '/path/to/sock' );
           my $r = Redis->new( reconnect => 60, every => 5000 );
           my $r = Redis->new( password => 'boo' );
           my $r = Redis->new( on_connect => sub { my ($redis) = @_; ... } );
           my $r = Redis->new( name => 'my_connection_name' );
           my $r = Redis->new( name => sub { "cache-for-$$" });

           my $redis = Redis->new(sentinels => [ '127.0.0.1:12345', '127.0.0.1:23456' ],
                                  service => 'mymaster');

           ## Connect via a list of Sentinels to a given service
           my $redis = Redis->new(sentinels => [ '127.0.0.1:12345' ], service => 'mymaster');

           ## Same, but with connection, read and write timeout on the sentinel hosts
           my $redis = Redis->new( sentinels => [ '127.0.0.1:12345' ], service => 'mymaster',
                                   sentinels_cnx_timeout => 0.1,
                                   sentinels_read_timeout => 1,
                                   sentinels_write_timeout => 1,
                                 );

       "server"

       The "server" parameter specifies the Redis server we should connect to, via TCP. Use the
       'IP:PORT' format. If no "server" option is present, we will attempt to use the
       "REDIS_SERVER" environment variable. If neither of those options are present, it defaults
       to '127.0.0.1:6379'.

       Alternatively you can use the "sock" parameter to specify the path of the UNIX domain
       socket where the Redis server is listening.

       Alternatively you can use the "sentinels" parameter and the "service" parameter to specify
       a list of sentinels to contact and try to get the address of the given service name.
       "sentinels" must be an ArrayRef and "service" an Str.

       The "REDIS_SERVER" can be used for UNIX domain sockets too. The following formats are
       supported:

       ·   /path/to/sock

       ·   unix:/path/to/sock

       ·   127.0.0.1:11011

       ·   tcp:127.0.0.1:11011

       "reconnect", "every"

       The "reconnect" option enables auto-reconnection mode. If we cannot connect to the Redis
       server, or if a network write fails, we enter retry mode.  We will try a new connection
       every "every" microseconds (1 ms by default), up-to "reconnect" seconds.

       Be aware that read errors will always thrown an exception, and will not trigger a retry
       until the new command is sent.

       If we cannot re-establish a connection after "reconnect" seconds, an exception will be
       thrown.

       "conservative_reconnect"

       "conservative_reconnect" option makes sure that reconnection is only attempted when no
       pending command is ongoing. For instance, if you're doing "$redis-"incr('key')>, and if
       the server properly understood and processed the command, but the network connection is
       dropped just before the server replies : the command has been processed but the client
       doesn't know it. In this situation, if reconnect is enabled, the Redis client will
       reconnect and send the "incr" command *again*. If it succeeds, at the end the key as been
       incremented *two* times. To avoid this issue, you can set the "conservative_reconnect"
       option to a true value. In this case, the client will reconnect only if no request is
       pending. Otherwise it will die with the message: "reconnect disabled while responses are
       pending and safe reconnect mode enabled".

       "cnx_timeout"

       The "cnx_timeout" option enables connection timeout. The Redis client will wait at most
       that number of seconds (can be fractional) before giving up connecting to a server.

       "sentinels_cnx_timeout"

       The "sentinels_cnx_timeout" option enables sentinel connection timeout.  When using the
       sentinels feature, Redis client will wait at most that number of seconds (can be
       fractional) before giving up connecting to a sentinel.  Default: 0.1

       "read_timeout"

       The "read_timeout" option enables read timeout. The Redis client will wait at most that
       number of seconds (can be fractional) before giving up when reading from the server.

       "sentinels_read_timeout"

       The "sentinels_read_timeout" option enables sentinel read timeout. When using the
       sentinels feature, the Redis client will wait at most that number of seconds (can be
       fractional) before giving up when reading from a sentinel server. Default: 1

       "write_timeout"

       The "write_timeout" option enables write timeout. The Redis client will wait at most that
       number of seconds (can be fractional) before giving up when reading from the server.

       "sentinels_write_timeout"

       The "sentinels_write_timeout" option enables sentinel write timeout. When using the
       sentinels feature, the Redis client will wait at most that number of seconds (can be
       fractional) before giving up when reading from a sentinel server. Default: 1

       "password"

       If your Redis server requires authentication, you can use the "password" attribute. After
       each established connection (at the start or when reconnecting), the Redis "AUTH" command
       will be send to the server. If the password is wrong, an exception will be thrown and
       reconnect will be disabled.

       "on_connect"

       You can also provide a code reference that will be immediately after each successful
       connection. The "on_connect" attribute is used to provide the code reference, and it will
       be called with the first parameter being the Redis object.

       "no_auto_connect_on_new"

       You can also provide "no_auto_connect_on_new" in which case "new" won't call
       "$obj->connect" for you implicitly, you'll have to do that yourself. This is useful for
       figuring out how long connection setup takes so you can configure the "cnx_timeout"
       appropriately.

       "no_sentinels_list_update"

       You can also provide "no_sentinels_list_update". By default (that is, without this
       option), when successfully contacting a sentinel server, the Redis client will ask it for
       the list of sentinels known for the given service, and merge it with its list of sentinels
       (in the "sentinels" attribute). You can disable this behavior by setting
       "no_sentinels_list_update" to a true value.

       "name"

       You can also set a name for each connection. This can be very useful for debugging
       purposes, using the "CLIENT LIST" command. To set a connection name, use the "name"
       parameter. You can use both a scalar value or a CodeRef. If the latter, it will be called
       after each connection, with the Redis object, and it should return the connection name to
       use. If it returns a undefined value, Redis will not set the connection name.

       Please note that there are restrictions on the name you can set, the most important of
       which is, no spaces. See the CLIENT SETNAME documentation
       <http://redis.io/commands/client-setname> for all the juicy details. This feature is safe
       to use with all versions of Redis servers. If "CLIENT SETNAME" support is not available
       (Redis servers 2.6.9 and above only), the name parameter is ignored.

       "debug"

       The "debug" parameter enables debug information to STDERR, including all interactions with
       the server. You can also enable debug with the "REDIS_DEBUG" environment variable.

CONNECTION HANDLING

   connect
         $r->connect;

       Connects to the Redis server. This is done by default when the obect is constructed using
       "new()", unless "no_auto_connect_on_new" has been set. See this option in the "new()"
       constructor.

   quit
         $r->quit;

       Closes the connection to the server. The "quit" method does not support pipelined
       operation.

   ping
         $r->ping || die "no server?";

       The "ping" method does not support pipelined operation.

PIPELINE MANAGEMENT

   wait_all_responses
       Waits until all pending pipelined responses have been received, and invokes the pipeline
       callback for each one.  See "PIPELINING".

   wait_one_response
       Waits until the first pending pipelined response has been received, and invokes its
       callback.  See "PIPELINING".

PUBLISH/SUBSCRIBE COMMANDS

       When one of "subscribe" or "psubscribe" is used, the Redis object will enter PubSub mode.
       When in PubSub mode only commands in this section, plus "quit", will be accepted.

       If you plan on using PubSub and other Redis functions, you should use two Redis objects,
       one dedicated to PubSub and the other for regular commands.

       All Pub/Sub commands receive a callback as the last parameter. This callback receives
       three arguments:

       ·   The published message.

       ·   The topic over which the message was sent.

       ·   The subscribed topic that matched the topic for the message. With "subscribe" these
           last two are the same, always. But with "psubscribe", this parameter tells you the
           pattern that matched.

       See the Pub-Sub notes <http://redis.io/topics/pubsub> for more information about the
       messages you will receive on your callbacks after each "subscribe", "unsubscribe",
       "psubscribe" and "punsubscribe".

   publish
         $r->publish($topic, $message);

       Publishes the $message to the $topic.

   subscribe
         $r->subscribe(
             @topics_to_subscribe_to,
             my $savecallback = sub {
               my ($message, $topic, $subscribed_topic) = @_;
               ...
             },
         );

       Subscribe one or more topics. Messages published into one of them will be received by
       Redis, and the specified callback will be executed.

   unsubscribe
         $r->unsubscribe(@topic_list, $savecallback);

       Stops receiving messages via $savecallback for all the topics in @topic_list. WARNING: it
       is important that you give the same calleback that you used for subscribtion. The value of
       the CodeRef must be the same, as this is how internally the code identifies it.

   psubscribe
         my @topic_matches = ('prefix1.*', 'prefix2.*');
         $r->psubscribe(@topic_matches, my $savecallback = sub { my ($m, $t, $s) = @_; ... });

       Subscribes a pattern of topics. All messages to topics that match the pattern will be
       delivered to the callback.

   punsubscribe
         my @topic_matches = ('prefix1.*', 'prefix2.*');
         $r->punsubscribe(@topic_matches, $savecallback);

       Stops receiving messages via $savecallback for all the topics pattern matches in
       @topic_list. WARNING: it is important that you give the same calleback that you used for
       subscribtion. The value of the CodeRef must be the same, as this is how internally the
       code identifies it.

   is_subscriber
         if ($r->is_subscriber) { say "We are in Pub/Sub mode!" }

       Returns true if we are in Pub/Sub mode.

   wait_for_messages
         my $keep_going = 1; ## Set to false somewhere to leave the loop
         my $timeout = 5;
         $r->wait_for_messages($timeout) while $keep_going;

       Blocks, waits for incoming messages and delivers them to the appropriate callbacks.

       Requires a single parameter, the number of seconds to wait for messages. Use 0 to wait for
       ever. If a positive non-zero value is used, it will return after that amount of seconds
       without a single notification.

       Please note that the timeout is not a commitment to return control to the caller at most
       each "timeout" seconds, but more a idle timeout, were control will return to the caller if
       Redis is idle (as in no messages were received during the timeout period) for more than
       "timeout" seconds.

       The "wait_for_messages" call returns the number of messages processed during the run.

IMPORTANT NOTES ON METHODS

   methods that return multiple values
       When a method returns more than one value, it checks the context and returns either a list
       of values or an ArrayRef.

   transaction-handling methods
       Warning: the behaviour of the TRANSACTIONS commands when combined with pipelining is still
       under discussion, and you should NOT use them at the same time just now.

       You can follow the discussion to see the open issues with this
       <https://github.com/PerlRedis/perl-redis/issues/17>.

   exec
         my @individual_replies = $r->exec;

       "exec" has special behaviour when run in a pipeline: the $reply argument to the pipeline
       callback is an array ref whose elements are themselves "[$reply, $error]" pairs.  This
       means that you can accurately detect errors yielded by any command in the transaction, and
       without any exceptions being thrown.

   keys
         my @keys = $r->keys( '*glob_pattern*' );
         my $keys = $r->keys( '*glob_pattern*' ); # count of matching keys

       Note that synchronous "keys" calls in a scalar context return the number of matching keys
       (not an array ref of matching keys as you might expect).  This does not apply in pipelined
       mode: assuming the server returns a list of keys, as expected, it is always passed to the
       pipeline callback as an array ref.

   hashes
       Hashes in Redis cannot be nested as in perl, if you want to store a nested hash, you need
       to serialize the hash first. If you want to have a named hash, you can use Redis-hashes.
       You will find an example in the tests of this module t/01-basic.t

   eval
       Note that this commands sends the Lua script every time you call it. See "evalsha" and
       "script_load" for an alternative.

   info
         my $info_hash = $r->info;

       The "info" method is unique in that it decodes the server's response into a hashref, if
       possible. This decoding happens in both synchronous and pipelined modes.

KEYS

   del
         $r->del(key [key ...])

       Delete a key (see <http://redis.io/commands/del>)

   dump
         $r->dump(key)

       Return a serialized version of the value stored at the specified key. (see
       <http://redis.io/commands/dump>)

   exists
         $r->exists(key)

       Determine if a key exists (see <http://redis.io/commands/exists>)

   expire
         $r->expire(key, seconds)

       Set a key's time to live in seconds (see <http://redis.io/commands/expire>)

   expireat
         $r->expireat(key, timestamp)

       Set the expiration for a key as a UNIX timestamp (see <http://redis.io/commands/expireat>)

   keys
         $r->keys(pattern)

       Find all keys matching the given pattern (see <http://redis.io/commands/keys>)

   migrate
         $r->migrate(host, port, key, destination-db, timeout, [COPY], [REPLACE])

       Atomically transfer a key from a Redis instance to another one. (see
       <http://redis.io/commands/migrate>)

   move
         $r->move(key, db)

       Move a key to another database (see <http://redis.io/commands/move>)

   object
         $r->object(subcommand, [arguments [arguments ...]])

       Inspect the internals of Redis objects (see <http://redis.io/commands/object>)

   persist
         $r->persist(key)

       Remove the expiration from a key (see <http://redis.io/commands/persist>)

   pexpire
         $r->pexpire(key, milliseconds)

       Set a key's time to live in milliseconds (see <http://redis.io/commands/pexpire>)

   pexpireat
         $r->pexpireat(key, milliseconds-timestamp)

       Set the expiration for a key as a UNIX timestamp specified in milliseconds (see
       <http://redis.io/commands/pexpireat>)

   pttl
         $r->pttl(key)

       Get the time to live for a key in milliseconds (see <http://redis.io/commands/pttl>)

   randomkey
         $r->randomkey()

       Return a random key from the keyspace (see <http://redis.io/commands/randomkey>)

   rename
         $r->rename(key, newkey)

       Rename a key (see <http://redis.io/commands/rename>)

   renamenx
         $r->renamenx(key, newkey)

       Rename a key, only if the new key does not exist (see <http://redis.io/commands/renamenx>)

   restore
         $r->restore(key, ttl, serialized-value)

       Create a key using the provided serialized value, previously obtained using DUMP. (see
       <http://redis.io/commands/restore>)

   scan
         $r->scan(cursor, [MATCH pattern], [COUNT count])

       Incrementally iterate the keys space (see <http://redis.io/commands/scan>)

   sort
         $r->sort(key, [BY pattern], [LIMIT offset count], [GET pattern [GET pattern ...]], [ASC|DESC], [ALPHA], [STORE destination])

       Sort the elements in a list, set or sorted set (see <http://redis.io/commands/sort>)

   ttl
         $r->ttl(key)

       Get the time to live for a key (see <http://redis.io/commands/ttl>)

   type
         $r->type(key)

       Determine the type stored at key (see <http://redis.io/commands/type>)

STRINGS

   append
         $r->append(key, value)

       Append a value to a key (see <http://redis.io/commands/append>)

   bitcount
         $r->bitcount(key, [start end])

       Count set bits in a string (see <http://redis.io/commands/bitcount>)

   bitop
         $r->bitop(operation, destkey, key [key ...])

       Perform bitwise operations between strings (see <http://redis.io/commands/bitop>)

   bitpos
         $r->bitpos(key, bit, [start], [end])

       Find first bit set or clear in a string (see <http://redis.io/commands/bitpos>)

   blpop
         $r->blpop(key [key ...], timeout)

       Remove and get the first element in a list, or block until one is available (see
       <http://redis.io/commands/blpop>)

   brpop
         $r->brpop(key [key ...], timeout)

       Remove and get the last element in a list, or block until one is available (see
       <http://redis.io/commands/brpop>)

   brpoplpush
         $r->brpoplpush(source, destination, timeout)

       Pop a value from a list, push it to another list and return it; or block until one is
       available (see <http://redis.io/commands/brpoplpush>)

   decr
         $r->decr(key)

       Decrement the integer value of a key by one (see <http://redis.io/commands/decr>)

   decrby
         $r->decrby(key, decrement)

       Decrement the integer value of a key by the given number (see
       <http://redis.io/commands/decrby>)

   get
         $r->get(key)

       Get the value of a key (see <http://redis.io/commands/get>)

   getbit
         $r->getbit(key, offset)

       Returns the bit value at offset in the string value stored at key (see
       <http://redis.io/commands/getbit>)

   getrange
         $r->getrange(key, start, end)

       Get a substring of the string stored at a key (see <http://redis.io/commands/getrange>)

   getset
         $r->getset(key, value)

       Set the string value of a key and return its old value (see
       <http://redis.io/commands/getset>)

   incr
         $r->incr(key)

       Increment the integer value of a key by one (see <http://redis.io/commands/incr>)

   incrby
         $r->incrby(key, increment)

       Increment the integer value of a key by the given amount (see
       <http://redis.io/commands/incrby>)

   incrbyfloat
         $r->incrbyfloat(key, increment)

       Increment the float value of a key by the given amount (see
       <http://redis.io/commands/incrbyfloat>)

   mget
         $r->mget(key [key ...])

       Get the values of all the given keys (see <http://redis.io/commands/mget>)

   mset
         $r->mset(key value [key value ...])

       Set multiple keys to multiple values (see <http://redis.io/commands/mset>)

   msetnx
         $r->msetnx(key value [key value ...])

       Set multiple keys to multiple values, only if none of the keys exist (see
       <http://redis.io/commands/msetnx>)

   psetex
         $r->psetex(key, milliseconds, value)

       Set the value and expiration in milliseconds of a key (see
       <http://redis.io/commands/psetex>)

   set
         $r->set(key, value, ['EX',  seconds], ['PX', milliseconds], ['NX'|'XX'])

       Set the string value of a key (see <http://redis.io/commands/set>). Example:

         $r->set('key', 'test', 'EX', 60, 'NX')

   setbit
         $r->setbit(key, offset, value)

       Sets or clears the bit at offset in the string value stored at key (see
       <http://redis.io/commands/setbit>)

   setex
         $r->setex(key, seconds, value)

       Set the value and expiration of a key (see <http://redis.io/commands/setex>)

   setnx
         $r->setnx(key, value)

       Set the value of a key, only if the key does not exist (see
       <http://redis.io/commands/setnx>)

   setrange
         $r->setrange(key, offset, value)

       Overwrite part of a string at key starting at the specified offset (see
       <http://redis.io/commands/setrange>)

   strlen
         $r->strlen(key)

       Get the length of the value stored in a key (see <http://redis.io/commands/strlen>)

HASHES

   hdel
         $r->hdel(key, field [field ...])

       Delete one or more hash fields (see <http://redis.io/commands/hdel>)

   hexists
         $r->hexists(key, field)

       Determine if a hash field exists (see <http://redis.io/commands/hexists>)

   hget
         $r->hget(key, field)

       Get the value of a hash field (see <http://redis.io/commands/hget>)

   hgetall
         $r->hgetall(key)

       Get all the fields and values in a hash (see <http://redis.io/commands/hgetall>)

   hincrby
         $r->hincrby(key, field, increment)

       Increment the integer value of a hash field by the given number (see
       <http://redis.io/commands/hincrby>)

   hincrbyfloat
         $r->hincrbyfloat(key, field, increment)

       Increment the float value of a hash field by the given amount (see
       <http://redis.io/commands/hincrbyfloat>)

   hkeys
         $r->hkeys(key)

       Get all the fields in a hash (see <http://redis.io/commands/hkeys>)

   hlen
         $r->hlen(key)

       Get the number of fields in a hash (see <http://redis.io/commands/hlen>)

   hmget
         $r->hmget(key, field [field ...])

       Get the values of all the given hash fields (see <http://redis.io/commands/hmget>)

   hmset
         $r->hmset(key, field value [field value ...])

       Set multiple hash fields to multiple values (see <http://redis.io/commands/hmset>)

   hscan
         $r->hscan(key, cursor, [MATCH pattern], [COUNT count])

       Incrementally iterate hash fields and associated values (see
       <http://redis.io/commands/hscan>)

   hset
         $r->hset(key, field, value)

       Set the string value of a hash field (see <http://redis.io/commands/hset>)

   hsetnx
         $r->hsetnx(key, field, value)

       Set the value of a hash field, only if the field does not exist (see
       <http://redis.io/commands/hsetnx>)

   hvals
         $r->hvals(key)

       Get all the values in a hash (see <http://redis.io/commands/hvals>)

SETS

   sadd
         $r->sadd(key, member [member ...])

       Add one or more members to a set (see <http://redis.io/commands/sadd>)

   scard
         $r->scard(key)

       Get the number of members in a set (see <http://redis.io/commands/scard>)

   sdiff
         $r->sdiff(key [key ...])

       Subtract multiple sets (see <http://redis.io/commands/sdiff>)

   sdiffstore
         $r->sdiffstore(destination, key [key ...])

       Subtract multiple sets and store the resulting set in a key (see
       <http://redis.io/commands/sdiffstore>)

   sinter
         $r->sinter(key [key ...])

       Intersect multiple sets (see <http://redis.io/commands/sinter>)

   sinterstore
         $r->sinterstore(destination, key [key ...])

       Intersect multiple sets and store the resulting set in a key (see
       <http://redis.io/commands/sinterstore>)

   sismember
         $r->sismember(key, member)

       Determine if a given value is a member of a set (see <http://redis.io/commands/sismember>)

   smembers
         $r->smembers(key)

       Get all the members in a set (see <http://redis.io/commands/smembers>)

   smove
         $r->smove(source, destination, member)

       Move a member from one set to another (see <http://redis.io/commands/smove>)

   spop
         $r->spop(key)

       Remove and return a random member from a set (see <http://redis.io/commands/spop>)

   srandmember
         $r->srandmember(key, [count])

       Get one or multiple random members from a set (see <http://redis.io/commands/srandmember>)

   srem
         $r->srem(key, member [member ...])

       Remove one or more members from a set (see <http://redis.io/commands/srem>)

   sscan
         $r->sscan(key, cursor, [MATCH pattern], [COUNT count])

       Incrementally iterate Set elements (see <http://redis.io/commands/sscan>)

   sunion
         $r->sunion(key [key ...])

       Add multiple sets (see <http://redis.io/commands/sunion>)

   sunionstore
         $r->sunionstore(destination, key [key ...])

       Add multiple sets and store the resulting set in a key (see
       <http://redis.io/commands/sunionstore>)

SORTED SETS

   zadd
         $r->zadd(key, score member [score member ...])

       Add one or more members to a sorted set, or update its score if it already exists (see
       <http://redis.io/commands/zadd>)

   zcard
         $r->zcard(key)

       Get the number of members in a sorted set (see <http://redis.io/commands/zcard>)

   zcount
         $r->zcount(key, min, max)

       Count the members in a sorted set with scores within the given values (see
       <http://redis.io/commands/zcount>)

   zincrby
         $r->zincrby(key, increment, member)

       Increment the score of a member in a sorted set (see <http://redis.io/commands/zincrby>)

   zinterstore
         $r->zinterstore(destination, numkeys, key [key ...], [WEIGHTS weight [weight ...]], [AGGREGATE SUM|MIN|MAX])

       Intersect multiple sorted sets and store the resulting sorted set in a new key (see
       <http://redis.io/commands/zinterstore>)

   zlexcount
         $r->zlexcount(key, min, max)

       Count the number of members in a sorted set between a given lexicographical range (see
       <http://redis.io/commands/zlexcount>)

   zrange
         $r->zrange(key, start, stop, [WITHSCORES])

       Return a range of members in a sorted set, by index (see
       <http://redis.io/commands/zrange>)

   zrangebylex
         $r->zrangebylex(key, min, max, [LIMIT offset count])

       Return a range of members in a sorted set, by lexicographical range (see
       <http://redis.io/commands/zrangebylex>)

   zrangebyscore
         $r->zrangebyscore(key, min, max, [WITHSCORES], [LIMIT offset count])

       Return a range of members in a sorted set, by score (see
       <http://redis.io/commands/zrangebyscore>)

   zrank
         $r->zrank(key, member)

       Determine the index of a member in a sorted set (see <http://redis.io/commands/zrank>)

   zrem
         $r->zrem(key, member [member ...])

       Remove one or more members from a sorted set (see <http://redis.io/commands/zrem>)

   zremrangebylex
         $r->zremrangebylex(key, min, max)

       Remove all members in a sorted set between the given lexicographical range (see
       <http://redis.io/commands/zremrangebylex>)

   zremrangebyrank
         $r->zremrangebyrank(key, start, stop)

       Remove all members in a sorted set within the given indexes (see
       <http://redis.io/commands/zremrangebyrank>)

   zremrangebyscore
         $r->zremrangebyscore(key, min, max)

       Remove all members in a sorted set within the given scores (see
       <http://redis.io/commands/zremrangebyscore>)

   zrevrange
         $r->zrevrange(key, start, stop, [WITHSCORES])

       Return a range of members in a sorted set, by index, with scores ordered from high to low
       (see <http://redis.io/commands/zrevrange>)

   zrevrangebylex
         $r->zrevrangebylex(key, max, min, [LIMIT offset count])

       Return a range of members in a sorted set, by lexicographical range, ordered from higher
       to lower strings. (see <http://redis.io/commands/zrevrangebylex>)

   zrevrangebyscore
         $r->zrevrangebyscore(key, max, min, [WITHSCORES], [LIMIT offset count])

       Return a range of members in a sorted set, by score, with scores ordered from high to low
       (see <http://redis.io/commands/zrevrangebyscore>)

   zrevrank
         $r->zrevrank(key, member)

       Determine the index of a member in a sorted set, with scores ordered from high to low (see
       <http://redis.io/commands/zrevrank>)

   zscan
         $r->zscan(key, cursor, [MATCH pattern], [COUNT count])

       Incrementally iterate sorted sets elements and associated scores (see
       <http://redis.io/commands/zscan>)

   zscore
         $r->zscore(key, member)

       Get the score associated with the given member in a sorted set (see
       <http://redis.io/commands/zscore>)

   zunionstore
         $r->zunionstore(destination, numkeys, key [key ...], [WEIGHTS weight [weight ...]], [AGGREGATE SUM|MIN|MAX])

       Add multiple sorted sets and store the resulting sorted set in a new key (see
       <http://redis.io/commands/zunionstore>)

HYPERLOGLOG

   pfadd
         $r->pfadd(key, element [element ...])

       Adds the specified elements to the specified HyperLogLog. (see
       <http://redis.io/commands/pfadd>)

   pfcount
         $r->pfcount(key [key ...])

       Return the approximated cardinality of the set(s) observed by the HyperLogLog at key(s).
       (see <http://redis.io/commands/pfcount>)

   pfmerge
         $r->pfmerge(destkey, sourcekey [sourcekey ...])

       Merge N different HyperLogLogs into a single one. (see <http://redis.io/commands/pfmerge>)

PUB/SUB

   pubsub
         $r->pubsub(subcommand, [argument [argument ...]])

       Inspect the state of the Pub/Sub subsystem (see <http://redis.io/commands/pubsub>)

TRANSACTIONS

   discard
         $r->discard()

       Discard all commands issued after MULTI (see <http://redis.io/commands/discard>)

   exec
         $r->exec()

       Execute all commands issued after MULTI (see <http://redis.io/commands/exec>)

   multi
         $r->multi()

       Mark the start of a transaction block (see <http://redis.io/commands/multi>)

   unwatch
         $r->unwatch()

       Forget about all watched keys (see <http://redis.io/commands/unwatch>)

   watch
         $r->watch(key [key ...])

       Watch the given keys to determine execution of the MULTI/EXEC block (see
       <http://redis.io/commands/watch>)

SCRIPTING

   eval
         $r->eval(script, numkeys, key [key ...], arg [arg ...])

       Execute a Lua script server side (see <http://redis.io/commands/eval>)

   evalsha
         $r->evalsha(sha1, numkeys, key [key ...], arg [arg ...])

       Execute a Lua script server side (see <http://redis.io/commands/evalsha>)

   script_exists
         $r->script_exists(script [script ...])

       Check existence of scripts in the script cache. (see
       <http://redis.io/commands/script-exists>)

   script_flush
         $r->script_flush()

       Remove all the scripts from the script cache. (see
       <http://redis.io/commands/script-flush>)

   script_kill
         $r->script_kill()

       Kill the script currently in execution. (see <http://redis.io/commands/script-kill>)

   script_load
         $r->script_load(script)

       Load the specified Lua script into the script cache. (see
       <http://redis.io/commands/script-load>)

CONNECTION

   auth
         $r->auth(password)

       Authenticate to the server (see <http://redis.io/commands/auth>)

   echo
         $r->echo(message)

       Echo the given string (see <http://redis.io/commands/echo>)

   ping
         $r->ping()

       Ping the server (see <http://redis.io/commands/ping>)

   quit
         $r->quit()

       Close the connection (see <http://redis.io/commands/quit>)

   select
         $r->select(index)

       Change the selected database for the current connection (see
       <http://redis.io/commands/select>)

SERVER

   bgrewriteaof
         $r->bgrewriteaof()

       Asynchronously rewrite the append-only file (see <http://redis.io/commands/bgrewriteaof>)

   bgsave
         $r->bgsave()

       Asynchronously save the dataset to disk (see <http://redis.io/commands/bgsave>)

   client_getname
         $r->client_getname()

       Get the current connection name (see <http://redis.io/commands/client-getname>)

   client_kill
         $r->client_kill([ip:port], [ID client-id], [TYPE normal|slave|pubsub], [ADDR ip:port], [SKIPME yes/no])

       Kill the connection of a client (see <http://redis.io/commands/client-kill>)

   client_list
         $r->client_list()

       Get the list of client connections (see <http://redis.io/commands/client-list>)

   client_pause
         $r->client_pause(timeout)

       Stop processing commands from clients for some time (see
       <http://redis.io/commands/client-pause>)

   client_setname
         $r->client_setname(connection-name)

       Set the current connection name (see <http://redis.io/commands/client-setname>)

   cluster_slots
         $r->cluster_slots()

       Get array of Cluster slot to node mappings (see <http://redis.io/commands/cluster-slots>)

   command
         $r->command()

       Get array of Redis command details (see <http://redis.io/commands/command>)

   command_count
         $r->command_count()

       Get total number of Redis commands (see <http://redis.io/commands/command-count>)

   command_getkeys
         $r->command_getkeys()

       Extract keys given a full Redis command (see <http://redis.io/commands/command-getkeys>)

   command_info
         $r->command_info(command-name [command-name ...])

       Get array of specific Redis command details (see <http://redis.io/commands/command-info>)

   config_get
         $r->config_get(parameter)

       Get the value of a configuration parameter (see <http://redis.io/commands/config-get>)

   config_resetstat
         $r->config_resetstat()

       Reset the stats returned by INFO (see <http://redis.io/commands/config-resetstat>)

   config_rewrite
         $r->config_rewrite()

       Rewrite the configuration file with the in memory configuration (see
       <http://redis.io/commands/config-rewrite>)

   config_set
         $r->config_set(parameter, value)

       Set a configuration parameter to the given value (see
       <http://redis.io/commands/config-set>)

   dbsize
         $r->dbsize()

       Return the number of keys in the selected database (see <http://redis.io/commands/dbsize>)

   debug_object
         $r->debug_object(key)

       Get debugging information about a key (see <http://redis.io/commands/debug-object>)

   debug_segfault
         $r->debug_segfault()

       Make the server crash (see <http://redis.io/commands/debug-segfault>)

   flushall
         $r->flushall()

       Remove all keys from all databases (see <http://redis.io/commands/flushall>)

   flushdb
         $r->flushdb()

       Remove all keys from the current database (see <http://redis.io/commands/flushdb>)

   info
         $r->info([section])

       Get information and statistics about the server (see <http://redis.io/commands/info>)

   lastsave
         $r->lastsave()

       Get the UNIX time stamp of the last successful save to disk (see
       <http://redis.io/commands/lastsave>)

   lindex
         $r->lindex(key, index)

       Get an element from a list by its index (see <http://redis.io/commands/lindex>)

   linsert
         $r->linsert(key, BEFORE|AFTER, pivot, value)

       Insert an element before or after another element in a list (see
       <http://redis.io/commands/linsert>)

   llen
         $r->llen(key)

       Get the length of a list (see <http://redis.io/commands/llen>)

   lpop
         $r->lpop(key)

       Remove and get the first element in a list (see <http://redis.io/commands/lpop>)

   lpush
         $r->lpush(key, value [value ...])

       Prepend one or multiple values to a list (see <http://redis.io/commands/lpush>)

   lpushx
         $r->lpushx(key, value)

       Prepend a value to a list, only if the list exists (see <http://redis.io/commands/lpushx>)

   lrange
         $r->lrange(key, start, stop)

       Get a range of elements from a list (see <http://redis.io/commands/lrange>)

   lrem
         $r->lrem(key, count, value)

       Remove elements from a list (see <http://redis.io/commands/lrem>)

   lset
         $r->lset(key, index, value)

       Set the value of an element in a list by its index (see <http://redis.io/commands/lset>)

   ltrim
         $r->ltrim(key, start, stop)

       Trim a list to the specified range (see <http://redis.io/commands/ltrim>)

   monitor
         $r->monitor()

       Listen for all requests received by the server in real time (see
       <http://redis.io/commands/monitor>)

   role
         $r->role()

       Return the role of the instance in the context of replication (see
       <http://redis.io/commands/role>)

   rpop
         $r->rpop(key)

       Remove and get the last element in a list (see <http://redis.io/commands/rpop>)

   rpoplpush
         $r->rpoplpush(source, destination)

       Remove the last element in a list, append it to another list and return it (see
       <http://redis.io/commands/rpoplpush>)

   rpush
         $r->rpush(key, value [value ...])

       Append one or multiple values to a list (see <http://redis.io/commands/rpush>)

   rpushx
         $r->rpushx(key, value)

       Append a value to a list, only if the list exists (see <http://redis.io/commands/rpushx>)

   save
         $r->save()

       Synchronously save the dataset to disk (see <http://redis.io/commands/save>)

   shutdown
         $r->shutdown([NOSAVE], [SAVE])

       Synchronously save the dataset to disk and then shut down the server (see
       <http://redis.io/commands/shutdown>)

   slaveof
         $r->slaveof(host, port)

       Make the server a slave of another instance, or promote it as master (see
       <http://redis.io/commands/slaveof>)

   slowlog
         $r->slowlog(subcommand, [argument])

       Manages the Redis slow queries log (see <http://redis.io/commands/slowlog>)

   sync
         $r->sync()

       Internal command used for replication (see <http://redis.io/commands/sync>)

   time
         $r->time()

       Return the current server time (see <http://redis.io/commands/time>)

ACKNOWLEDGEMENTS

       The following persons contributed to this project (random order):

       ·   Aaron Crane (pipelining and AUTOLOAD caching support)

       ·   Dirk Vleugels

       ·   Flavio Poletti

       ·   Jeremy Zawodny

       ·   sunnavy at bestpractical.com

       ·   Thiago Berlitz Rondon

       ·   Ulrich Habel

       ·   Ivan Kruglov

       ·   Steffen Mueller <smueller@cpan.org>

AUTHORS

       ·   Pedro Melo <melo@cpan.org>

       ·   Damien Krotkine <dams@cpan.org>

COPYRIGHT AND LICENSE

       This software is Copyright (c) 2015 by Pedro Melo, Damien Krotkine.

       This is free software, licensed under:

         The Artistic License 2.0 (GPL Compatible)