# Redis configuration file example
# Note on units: when memory size
is needed, it
is possible to specifiy
# it
in the usual form of 1k 5GB 4M and so forth:
#
# 1k =>
1000 bytes
# 1kb =>
1024 bytes
# 1m =>
1000000 bytes
# 1mb =>
1024*
1024 bytes
# 1g =>
1000000000 bytes
# 1gb =>
1024*
1024*
1024 bytes
#
# units are
case insensitive so 1GB 1Gb 1gB are all the same.
# By
default Redis does not run
as a daemon. Use
'yes' if you need it.
# Note that Redis will write a pid file
in /
var/run/redis.pid when daemonized.
daemonize yes
# When running daemonized, Redis writes a pid file
in /
var/run/redis.pid by
#
default. You can specify a custom pid file location here.
pidfile /usr/local/redis/run/redis.pid
# Accept connections on the specified port,
default is 6379port
6379# If you want you can bind a single
interface,
if the bind option
is not
# specified all the interfaces will listen
for incoming connections.
#
#bind
192.168.
20.12# Close the connection after a client
is idle
for N seconds (
0 to disable)
timeout
300# Set server verbosity to
'debug'# it can be one of:
# debug (a lot of information, useful
for development/testing)
# verbose (many rarely useful info, but not a mess like the debug level)
# notice (moderately verbose, what you want
in production probably)
# warning (only very important / critical messages are logged)
loglevel verbose
# Specify the log file name. Also
'stdout' can be used to force
# Redis to log on the standard output. Note that
if you use standard
# output
for logging but daemonize, logs will be sent to /dev/
null#logfile stdout
logfile ./logs/redis.log
# Set the number of databases. The
default database
is DB
0, you can
select# a different one on a per-connection basis
using SELECT <dbid>
where# dbid
is a number between
0 and
'databases'-
1databases
16################################ SNAPSHOTTING #################################
#
# Save the DB on disk:
#
# save <seconds> <changes>
#
# Will save the DB
if both the given number of seconds and the given
# number of write operations against the DB occurred.
#
# In the example below the behaviour will be to save:
# after
900 sec (
15 min)
if at least
1 key changed
# after
300 sec (
5 min)
if at least
10 keys changed
# after
60 sec
if at least
10000 keys changed
#
# Note: you can disable saving at all commenting all the
"save" lines.
save
900 1save
300 10save
60 10000# Compress
string objects
using LZF when dump .rdb databases?
# For
default that
's set to 'yes
' as it's almost always a win.
# If you want to save some CPU
in the saving child
set it to
'no' but
# the dataset will likely be bigger
if you have compressible values or keys.
rdbcompression yes
# The filename
where to dump the DB
dbfilename dump.rdb
# The working directory.
#
# The DB will be written inside
this directory, with the filename specified
# above
using the
'dbfilename' configuration directive.
#
# Also the Append Only File will be created inside
this directory.
#
# Note that you must specify a directory here, not a file name.
dir ./data/
################################# REPLICATION #################################
# Master-Slave replication. Use slaveof to make a Redis instance a copy of
# another Redis server. Note that the configuration
is local to the slave
# so
for example it
is possible to configure the slave to save the DB with a
# different interval, or to listen to another port, and so on.
#
# slaveof <masterip> <masterport>
# If the master
is password
protected (
using the
"requirepass" configuration
# directive below) it
is possible to tell the slave to authenticate before
# starting the replication synchronization process, otherwise the master will
# refuse the slave request.
#
# masterauth <master-password>
################################## SECURITY ###################################
# Require clients to issue AUTH <PASSWORD> before processing any other
# commands. This might be useful
in environments
in which you
do not trust
# others with access to the host running redis-server.
#
# This should stay commented
out for backward compatibility and because most
# people
do not need auth (e.g. they run their own servers).
#
# Warning: since Redis
is pretty fast an outside user can
try up to
# 150k passwords per second against a good box. This means that you should
# use a very strong password otherwise it will be very easy to
break.
#
# requirepass foobared
################################### LIMITS ####################################
# Set the max number of connected clients at the same time. By
default there
#
is no limit, and it
's up to the number of file descriptors the Redis process
#
is able to open. The special value
'0' means no limits.
# Once the limit
is reached Redis will close all the
new connections sending
# an error
'max number of clients reached'.
#
# maxclients
128# Don
't use more memory than the specified amount of bytes.
# When the memory limit
is reached Redis will
try to remove keys with an
# EXPIRE
set. It will
try to start freeing keys that are going to expire
#
in little time and preserve keys with a longer time to live.
# Redis will also
try to remove objects
from free lists
if possible.
#
# If all
this fails, Redis will start to reply with errors to commands
# that will use more memory, like SET, LPUSH, and so on, and will
continue# to reply to most read-only commands like GET.
#
# WARNING: maxmemory can be a good idea mainly
if you want to use Redis
as a
#
'state' server or cache, not
as a real DB. When Redis
is used
as a real
# database the memory usage will grow over the weeks, it will be obvious
if# it
is going to use too much memory
in the
long run, and you
'll have the time
# to upgrade. With maxmemory after the limit
is reached you
'll start to get
# errors
for write operations, and
this may even lead to DB inconsistency.
#
# maxmemory <bytes>
############################## APPEND ONLY MODE ###############################
# By
default Redis asynchronously dumps the dataset on disk. If you can live
# with the idea that the latest records will be lost
if something like a crash
# happens
this is the preferred way to run Redis. If instead you care a lot
# about your data and don
't want to that a single record can get lost you should
# enable the append only mode: when
this mode
is enabled Redis will append
# every write operation received
in the file appendonly.aof. This file will
# be read on startup
in order to rebuild the full dataset
in memory.
#
# Note that you can have both the async dumps and the append only file
if you
# like (you have to comment the
"save" statements above to disable the dumps).
# Still
if append only mode
is enabled Redis will load the data
from the
# log file at startup ignoring the dump.rdb file.
#
# IMPORTANT: Check the BGREWRITEAOF to check how to rewrite the append
# log file
in background when it gets too big.
appendonly yes
# The name of the append only file (
default:
"appendonly.aof")
appendfilename appendonly.aof
# The fsync() call tells the Operating System to actually write data on disk
# instead to wait
for more data
in the output buffer. Some OS will really flush
# data on disk, some other OS will just
try to
do it ASAP.
#
# Redis supports three different modes:
#
# no: don
't fsync, just let the OS flush the data when it wants. Faster.
# always: fsync after every write to the append only log . Slow, Safest.
# everysec: fsync only
if one second passed since the last fsync. Compromise.
#
# The
default is "everysec" that
's usually the right compromise between
# speed and data safety. It
's up to you to understand if you can relax this to
#
"no" that will will let the operating system flush the output buffer when
# it wants,
for better performances (but
if you can live with the idea of
# some data loss consider the
default persistence mode that
's snapshotting),
# or on the contrary, use
"always" that
's very slow but a bit safer than
# everysec.
#
# If unsure, use
"everysec".
# appendfsync always
appendfsync everysec
# appendfsync no
################################ VIRTUAL MEMORY ###############################
# Virtual Memory allows Redis to work with datasets bigger than the actual
# amount of RAM needed to hold the whole dataset
in memory.
# In order to
do so very used keys are taken
in memory
while the other keys
# are swapped into a swap file, similarly to what operating systems
do# with memory pages.
#
# To enable VM just
set 'vm-enabled' to yes, and
set the following three
# VM parameters accordingly to your needs.
vm-enabled no
# vm-enabled yes
# This
is the path of the Redis swap file. As you can guess, swap files
# can
't be shared by different Redis instances, so make sure to use a swap
# file
for every redis process you are running. Redis will complain
if the
# swap file
is already
in use.
#
# The best kind of storage
for the Redis swap file (that
's accessed at random)
#
is a Solid State Disk (SSD).
#
# *** WARNING ***
if you are
using a shared hosting the
default of putting
# the swap file under /tmp
is not secure. Create a dir with access granted
# only to Redis user and configure Redis to create the swap file there.
vm-swap-file /tmp/redis.swap
# vm-max-memory configures the VM to use at max the specified amount of
# RAM. Everything that deos not fit will be swapped on disk *
if* possible, that
#
is,
if there
is still enough contiguous space
in the swap file.
#
# With vm-max-memory
0 the system will swap everything it can. Not a good
#
default, just specify the max amount of RAM you can
in bytes, but it
's
# better to leave some margin. For instance specify an amount of RAM
# that
's more or less between 60 and 80% of your free RAM.
vm-max-memory
0# Redis swap files
is split into pages. An
object can be saved
using multiple
# contiguous pages, but pages can
't be shared between different objects.
# So
if your page
is too big, small objects swapped
out on disk will waste
# a lot of space. If you page
is too small, there
is less space
in the swap
# file (assuming you configured the same number of total swap file pages).
#
# If you use a lot of small objects, use a page size of
64 or
32 bytes.
# If you use a lot of big objects, use a bigger page size.
# If unsure, use the
default :)
vm-page-size
32# Number of total memory pages
in the swap file.
# Given that the page table (a bitmap of free/used pages)
is taken
in memory,
# every
8 pages on disk will consume
1 byte of RAM.
#
# The total swap size
is vm-page-size * vm-pages
#
# With the
default of
32-bytes memory pages and
134217728 pages Redis will
# use a
4 GB swap file, that will use
16 MB of RAM
for the page table.
#
# It
's better to use the smallest acceptable value for your application,
# but the
default is large
in order to work
in most conditions.
vm-pages
134217728# Max number of VM I/O threads running at the same time.
# This threads are used to read/write data
from/to swap file, since they
# also encode and decode objects
from disk to memory or the reverse, a bigger
# number of threads can help with big objects even
if they can
't help with
# I/O itself
as the physical device may not be able to couple with many
# reads/writes operations at the same time.
#
# The special value of
0 turn off threaded I/O and enables the blocking
# Virtual Memory implementation.
vm-max-threads
4############################### ADVANCED CONFIG ###############################
# Glue small output buffers together
in order to send small replies
in a
# single TCP packet. Uses a bit more CPU but most of the times it
is a win
#
in terms of number of queries per second. Use
'yes' if unsure.
glueoutputbuf yes
# Hashes are encoded
in a special way (much more memory efficient) when they
# have at max a given numer of elements, and the biggest element does not
# exceed a given threshold. You can configure
this limits with the following
# configuration directives.
hash-max-zipmap-entries
64hash-max-zipmap-value
512# Active rehashing uses
1 millisecond every
100 milliseconds of CPU time
in# order to help rehashing the main Redis hash table (the one mapping top-level
# keys to values). The hash table implementation redis uses (see dict.c)
# performs a lazy rehashing: the more operation you run into an hash table
# that
is rhashing, the more rehashing
"steps" are performed, so
if the
# server
is idle the rehashing
is never complete and some more memory
is used
# by the hash table.
#
# The
default is to use
this millisecond
10 times every second
in order to
# active rehashing the main dictionaries, freeing memory when possible.
#
# If unsure:
# use
"activerehashing no" if you have hard latency requirements and it
is# not a good thing
in your environment that Redis can reply form time to time
# to queries with
2 milliseconds delay.
#
# use
"activerehashing yes" if you don
't have such hard requirements but
# want to free memory asap when possible.
activerehashing yes
################################## INCLUDES ###################################
# Include one or more other config files here. This
is useful
if you
# have a standard template that goes to all redis server but also need
# to customize a few per-server settings. Include files can include
# other files, so use
this wisely.
#
# include /path/to/local.conf
# include /path/to/other.conf
