NAME

Redis - Perl binding for Redis database

VERSION

version 1.995

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 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".

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 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.

$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.

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 is free software, licensed under:

The Artistic License 2.0 (GPL Compatible)

To install Redis, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Redis

CPAN shell

perl -MCPAN -e shell
install Redis

For more information on module installation, please visit the detailed CPAN module installation guide.

	Global
`s`	Focus search bar
`?`	Bring up this help dialog

	GitHub
`g` `p`	Go to pull requests
`g` `i`	go to github issues (only if github is preferred repository)

	POD
`g` `a`	Go to author
`g` `c`	Go to changes
`g` `i`	Go to issues
`g` `d`	Go to dist
`g` `r`	Go to repository/SCM
`g` `s`	Go to source
`g` `b`	Go to file browse

	Search terms
module: (e.g. module:Plugin)
distribution: (e.g. distribution:Dancer auth)
author: (e.g. author:SONGMU Redis)
version: (e.g. version:1.00)

NAME

VERSION

SYNOPSIS

DESCRIPTION

PIPELINING

ENCODING

CONSTRUCTOR

new

server

reconnect, every

conservative_reconnect

cnx_timeout

sentinels_cnx_timeout

read_timeout

sentinels_read_timeout

write_timeout

sentinels_write_timeout

password

on_connect

no_auto_connect_on_new

no_sentinels_list_update

name

debug

CONNECTION HANDLING

connect

quit

ping

PIPELINE MANAGEMENT

wait_all_responses

wait_one_response

PUBLISH/SUBSCRIBE COMMANDS

publish

subscribe

unsubscribe

psubscribe

punsubscribe

is_subscriber

wait_for_messages

IMPORTANT NOTES ON METHODS

methods that return multiple values

transaction-handling methods

exec

keys

hashes

eval

info

KEYS

del

dump

exists

expire

expireat

keys

migrate

move

object

persist

pexpire

pexpireat

pttl

randomkey

rename

renamenx

restore

scan

sort

ttl

type

STRINGS

append

bitcount

bitop

bitpos

blpop

brpop

brpoplpush

decr

decrby

get

getbit

`server`

`reconnect`, `every`

`conservative_reconnect`

`cnx_timeout`

`sentinels_cnx_timeout`

`read_timeout`

`sentinels_read_timeout`

`write_timeout`

`sentinels_write_timeout`

`password`

`on_connect`

`no_auto_connect_on_new`

`no_sentinels_list_update`

`name`

`debug`