NAME

Redis - Perl binding for Redis database

VERSION

version 2.000

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');

## Connect to Redis over a secure SSL/TLS channel.  See
## IO::Socket::SSL documentation for more information
## about SSL_verify_mode parameter.
my $redis = Redis->new(
    server => 'redis.tls.example.com:8080',
    ssl => 1,
    SSL_verify_mode => SSL_VERIFY_PEER,
);

## 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 https://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 https://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( server => '192.168.0.1:6379', ssl => 1, SSL_verify_mode => SSL_VERIFY_PEER );
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.

`ssl`

You can connect to Redis over SSL/TLS by setting this flag if the target Redis server or cluster has been setup to support SSL/TLS. This requires IO::Socket::SSL to be installed on the client. It's off by default.

`SSL_verify_mode`

This parameter will be applied when ssl flag is set. It sets the verification mode for the peer certificate. It's compatible with the parameter with the same name in IO::Socket::SSL.

`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 https://redis.io/commands/del)

dump

$r->dump(key)

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

exists

$r->exists(key)

Determine if a key exists (see https://redis.io/commands/exists)

expire

$r->expire(key, seconds)

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

expireat

$r->expireat(key, timestamp)

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

keys

$r->keys(pattern)

Find all keys matching the given pattern (see https://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 https://redis.io/commands/migrate)

move

$r->move(key, db)

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

object

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

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

persist

$r->persist(key)

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

pexpire

$r->pexpire(key, milliseconds)

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

pexpireat

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

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

pttl

$r->pttl(key)

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

randomkey

$r->randomkey()

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

rename

$r->rename(key, newkey)

Rename a key (see https://redis.io/commands/rename)

renamenx

$r->renamenx(key, newkey)

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

restore

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

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

scan

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

Incrementally iterate the keys space (see https://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 https://redis.io/commands/sort)

ttl

$r->ttl(key)

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

type

$r->type(key)

Determine the type stored at key (see https://redis.io/commands/type)

STRINGS

append

$r->append(key, value)

Append a value to a key (see https://redis.io/commands/append)

bitcount

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

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

bitop

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

Perform bitwise operations between strings (see https://redis.io/commands/bitop)

bitpos

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

Find first bit set or clear in a string (see https://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 https://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 https://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 https://redis.io/commands/brpoplpush)

decr

$r->decr(key)

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

decrby

$r->decrby(key, decrement)

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

get

$r->get(key)

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

getbit

$r->getbit(key, offset)

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

getrange

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

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

getset

$r->getset(key, value)

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

incr

$r->incr(key)

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

incrby

$r->incrby(key, increment)

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

incrbyfloat

$r->incrbyfloat(key, increment)

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

mget

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

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

mset

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

Set multiple keys to multiple values (see https://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 https://redis.io/commands/msetnx)

psetex

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

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

set

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

Set the string value of a key (see https://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 https://redis.io/commands/setbit)

setex

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

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

setnx

$r->setnx(key, value)

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

setrange

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

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

strlen

$r->strlen(key)

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

HASHES

hdel

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

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

hexists

$r->hexists(key, field)

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

hget

$r->hget(key, field)

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

hgetall

$r->hgetall(key)

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

hincrby

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

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

hincrbyfloat

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

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

hkeys

$r->hkeys(key)

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

hlen

$r->hlen(key)

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

hmget

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

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

hmset

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

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

hscan

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

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

hset

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

Set the string value of a hash field (see https://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 https://redis.io/commands/hsetnx)

hvals

$r->hvals(key)

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

SETS

sadd

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

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

scard

$r->scard(key)

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

sdiff

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

Subtract multiple sets (see https://redis.io/commands/sdiff)

sdiffstore

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

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

sinter

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

Intersect multiple sets (see https://redis.io/commands/sinter)

sinterstore

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

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

sismember

$r->sismember(key, member)

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

smembers

$r->smembers(key)

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

smove

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

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

spop

$r->spop(key)

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

srandmember

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

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

srem

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

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

sscan

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

Incrementally iterate Set elements (see https://redis.io/commands/sscan)

sunion

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

Add multiple sets (see https://redis.io/commands/sunion)

sunionstore

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

Add multiple sets and store the resulting set in a key (see https://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 https://redis.io/commands/zadd)

zcard

$r->zcard(key)

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

zcount

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

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

zincrby

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

Increment the score of a member in a sorted set (see https://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 https://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 https://redis.io/commands/zlexcount)

zrange

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

Return a range of members in a sorted set, by index (see https://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 https://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 https://redis.io/commands/zrangebyscore)

zrank

$r->zrank(key, member)

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

zrem

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

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

zremrangebylex

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

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

zremrangebyrank

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

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

zremrangebyscore

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

Remove all members in a sorted set within the given scores (see https://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 https://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 https://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 https://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 https://redis.io/commands/zrevrank)

zscan

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

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

zscore

$r->zscore(key, member)

Get the score associated with the given member in a sorted set (see https://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 https://redis.io/commands/zunionstore)

HYPERLOGLOG

pfadd

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

Adds the specified elements to the specified HyperLogLog. (see https://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 https://redis.io/commands/pfcount)

pfmerge

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

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

PUB/SUB

pubsub

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

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

TRANSACTIONS

discard

$r->discard()

Discard all commands issued after MULTI (see https://redis.io/commands/discard)

exec

$r->exec()

Execute all commands issued after MULTI (see https://redis.io/commands/exec)

multi

$r->multi()

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

unwatch

$r->unwatch()

Forget about all watched keys (see https://redis.io/commands/unwatch)

watch

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

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

SCRIPTING

eval

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

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

evalsha

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

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

script_exists

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

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

script_flush

$r->script_flush()

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

script_kill

$r->script_kill()

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

script_load

$r->script_load(script)

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

CONNECTION

auth

$r->auth(password)

Authenticate to the server (see https://redis.io/commands/auth)

$r->auth(username, password)

Authenticate to the server using Redis 6.0+ ACL System (see https://redis.io/commands/auth)

echo

$r->echo(message)

Echo the given string (see https://redis.io/commands/echo)

ping

$r->ping()

Ping the server (see https://redis.io/commands/ping)

quit

$r->quit()

Close the connection (see https://redis.io/commands/quit)

select

$r->select(index)

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

SERVER

bgrewriteaof

$r->bgrewriteaof()

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

bgsave

$r->bgsave()

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

client_getname

$r->client_getname()

Get the current connection name (see https://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 https://redis.io/commands/client-kill)

client_list

$r->client_list()

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

client_pause

$r->client_pause(timeout)

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

client_setname

$r->client_setname(connection-name)

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

cluster_slots

$r->cluster_slots()

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

command

$r->command()

Get array of Redis command details (see https://redis.io/commands/command)

command_count

$r->command_count()

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

command_getkeys

$r->command_getkeys()

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

command_info

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

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

config_get

$r->config_get(parameter)

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

config_resetstat

$r->config_resetstat()

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

config_rewrite

$r->config_rewrite()

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

config_set

$r->config_set(parameter, value)

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

dbsize

$r->dbsize()

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

debug_object

$r->debug_object(key)

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

debug_segfault

$r->debug_segfault()

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

flushall

$r->flushall()

Remove all keys from all databases (see https://redis.io/commands/flushall)

flushdb

$r->flushdb()

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

info

$r->info([section])

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

lastsave

$r->lastsave()

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

lindex

$r->lindex(key, index)

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

linsert

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

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

llen

$r->llen(key)

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

lpop

$r->lpop(key)

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

lpush

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

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

lpushx

$r->lpushx(key, value)

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

lrange

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

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

lrem

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

Remove elements from a list (see https://redis.io/commands/lrem)

lset

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

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

ltrim

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

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

monitor

$r->monitor()

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

role

$r->role()

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

rpop

$r->rpop(key)

Remove and get the last element in a list (see https://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 https://redis.io/commands/rpoplpush)

rpush

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

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

rpushx

$r->rpushx(key, value)

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

save

$r->save()

Synchronously save the dataset to disk (see https://redis.io/commands/save)

shutdown

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

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

slaveof

$r->slaveof(host, port)

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

slowlog

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

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

sync

$r->sync()

Internal command used for replication (see https://redis.io/commands/sync)

time

$r->time()

Return the current server time (see https://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

ssl

SSL_verify_mode

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

`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`

`ssl`

`SSL_verify_mode`

`debug`