redis-server.conf in boned-0.3.0

- old
+ new
@@ -1,177 +1,195 @@
-# Redis configuration file for Boned
+# BS REDIS 2.0 CONFIG (dev) -- 2010-11-17
 
-# Changes:
-# * port
-# * daemonize
-# * dbfilename
+# NOTE: NOTE: auto-generated by delano on tucker at 2010-11-29 11:49:17 -0500
 
-# 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.
+dir /tmp
+
+pidfile boned-redis.pid
+logfile boned-redis.log
+dbfilename boned-redis.rdb
+
+port 8045
+bind 127.0.0.1
 daemonize yes
 
-# The filename where to dump the DB
-dbfilename /tmp/boned-redis.rdb
+timeout 300
 
-# When run as a daemon, Redis write a pid file in /var/run/redis.pid by default.
-# You can specify a custom pid file location here.
-pidfile /var/run/redis.pid
+#loglevel debug
+#loglevel verbose
+loglevel warning
 
-# Accept connections on the specified port, default is 6379
-port 8045
+databases 16
 
-# If you want you can bind a single interface, if the bind option is not
-# specified all the interfaces will listen for connections.
-#
-# bind 127.0.0.1
+save 900 100
+save 300 5000
 
-# Close the connection after a client is idle for N seconds (0 to disable)
-timeout 300
 
-# 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
-save 600 1
-save 300 10
-save 60 10000
+rdbcompression yes
 
+# requirepass foobared
+# maxclients 0
 
-# For default save/load DB in/from the working directory
-# Note that you must specify a directory not a file name.
-dir ./
+appendonly no
+appendfilename redis.aof
 
-# Set server verbosity to 'debug'
-# it can be one of:
-# debug (a lot of information, useful for development/testing)
-# notice (moderately verbose, what you want in production probably)
-# warning (only very important / critical messages are logged)
-loglevel debug
+# TODO: Consider having separate configs when the usecase for Redis
+# changes. For example, one for production, another for batch processing. 
+#
+# Nothing is changed from here on out:
 
-# Specify the log file name. Also 'stdout' can be used to force
-# the demon 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
+################################## INCLUDES ###################################
 
-# 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'-1
-databases 16
+# 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
 
 ################################# 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>
 
-################################## 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.
+# 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.
 #
-# This should stay commented out for backward compatibility and because most
-# people do not need auth (e.g. they run their own servers).
+# masterauth <master-password>
 
-# requirepass 
 
-################################### LIMITS ####################################
+# 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".
 
-# 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 limts.
-# Once the limit is reached Redis will close all the new connections sending
-# an error 'max number of clients reached'.
+# appendfsync always
+appendfsync everysec
+# appendfsync no
 
-# maxclients 128
+################################ VIRTUAL MEMORY ###############################
 
-# 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.
+# 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.
 #
-# 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.
+# To enable VM just set 'vm-enabled' to yes, and set the following three
+# VM parameters accordingly to your needs.
 
-# maxmemory <bytes>
+vm-enabled no
+# vm-enabled yes
 
-############################## 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.log. This file will
-# be read on startup in order to rebuild the full dataset in memory.
+# 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.
 #
-# 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.
+# The best kind of storage for the Redis swap file (that's accessed at random) 
+# is a Solid State Disk (SSD).
 #
-# The name of the append only file is "appendonly.log"
+# *** 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
 
-appendonly no
+# 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
 
-# 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 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).
 #
-# Redis supports three different modes:
+# 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.
 #
-# 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 total swap size is vm-page-size * vm-pages
 #
-# The default is "always" that's the safer of the options. It's up to you to
-# understand if you can relax this to "everysec" that will fsync every second
-# or to "no" that will let the operating system flush the output buffer when
-# it want, for better performances (but if you can live with the idea of
-# some data loss consider the default persistence mode that's snapshotting).
+# 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
 
-appendfsync always
-# appendfsync everysec
-# appendfsync no
+# 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
 
-# Use object sharing. Can save a lot of memory if you have many common
-# string in your dataset, but performs lookups against the shared objects
-# pool so it uses more CPU and can be a bit slower. Usually it's a good
-# idea.
+# 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 64
+hash-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.
 #
-# When object sharing is enabled (shareobjects yes) you can use
-# shareobjectspoolsize to control the size of the pool used in order to try
-# object sharing. A bigger pool size will lead to better sharing capabilities.
-# In general you want this value to be at least the double of the number of
-# very common strings you have in your dataset.
+# 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.
 #
-# WARNING: object sharing is experimental, don't enable this feature
-# in production before of Redis 1.0-stable. Still please try this feature in
-# your development environment so that we can test it better.
-shareobjects no
-shareobjectspoolsize 1024
+# use "activerehashing yes" if you don't have such hard requirements but
+# want to free memory asap when possible.
+activerehashing yes