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Redis is an in-memory database that persists on disk. The data model is key-value, but many different kind of values are supported: Strings, Lists, Sets, Sorted Sets, Hashes

Speedup hllRawSum() processing 8 bytes per iteration.

The internal HLL raw encoding used by PFCOUNT when merging multiple keys
is aligned to 8 bits (1 byte per register) so we can exploit this to
improve performances by processing multiple bytes per iteration.

In benchmarks the new code was several times faster with HLLs with many
registers set to zero, while no slowdown was observed with populated
HLLs.
latest commit 5eb7ac0c92
Salvatore Sanfilippo authored April 17, 2014
Octocat-spinner-32 deps Linenoise updated, multiline mode enabled in redis-cli. March 13, 2014
Octocat-spinner-32 src Speedup hllRawSum() processing 8 bytes per iteration. April 17, 2014
Octocat-spinner-32 tests Sorted set lex ranges stress tester. April 17, 2014
Octocat-spinner-32 utils Make hll-gnuplot-graph.rb callable from cli. April 03, 2014
Octocat-spinner-32 .gitignore Redis/Jemalloc Gitignore were too aggressive. April 18, 2013
Octocat-spinner-32 00-RELEASENOTES Added a release notes file good for "unstable". February 10, 2014
Octocat-spinner-32 BUGS Switched issues URL to Github in BUGS October 18, 2011
Octocat-spinner-32 CONTRIBUTING Grammar fix. December 05, 2013
Octocat-spinner-32 COPYING update copyright year February 03, 2014
Octocat-spinner-32 INSTALL INSTALL now redirects the user to README February 05, 2012
Octocat-spinner-32 MANIFESTO Format to fit 80 columns February 12, 2013
Octocat-spinner-32 Makefile Fix `install` target on OSX (see #495) May 04, 2012
Octocat-spinner-32 README Finally fix the `install_server.sh` script. March 24, 2014
Octocat-spinner-32 redis.conf User-defined switch point between sparse-dense HLL encodings. April 15, 2014
Octocat-spinner-32 runtest Check available tcl versions February 05, 2013
Octocat-spinner-32 runtest-sentinel Sentinel test: Makefile target added. March 05, 2014
Octocat-spinner-32 sentinel.conf Typo in sentinel.conf, exists -> exits. March 11, 2014
README
Where to find complete Redis documentation?
-------------------------------------------

This README is just a fast "quick start" document. You can find more detailed
documentation at http://redis.io

Building Redis
--------------

Redis can be compiled and used on Linux, OSX, OpenBSD, NetBSD, FreeBSD.
We support big endian and little endian architectures.

It may compile on Solaris derived systems (for instance SmartOS) but our
support for this platform is "best effort" and Redis is not guaranteed to
work as well as in Linux, OSX, and *BSD there.

It is as simple as:

    % make

You can run a 32 bit Redis binary using:

    % make 32bit

After building Redis is a good idea to test it, using:

    % make test

Fixing problems building 32 bit binaries
---------

If after building Redis with a 32 bit target you need to rebuild it
with a 64 bit target, or the other way around, you need to perform a
"make distclean" in the root directory of the Redis distribution.

In case of build errors when trying to build a 32 bit binary of Redis, try
the following steps:

* Install the packages libc6-dev-i386 (also try g++-multilib).
* Try using the following command line instead of "make 32bit":

    make CFLAGS="-m32 -march=native" LDFLAGS="-m32"

Allocator
---------

Selecting a non-default memory allocator when building Redis is done by setting
the `MALLOC` environment variable. Redis is compiled and linked against libc
malloc by default, with the exception of jemalloc being the default on Linux
systems. This default was picked because jemalloc has proven to have fewer
fragmentation problems than libc malloc.

To force compiling against libc malloc, use:

    % make MALLOC=libc

To compile against jemalloc on Mac OS X systems, use:

    % make MALLOC=jemalloc

Verbose build
-------------

Redis will build with a user friendly colorized output by default.
If you want to see a more verbose output use the following:

    % make V=1

Running Redis
-------------

To run Redis with the default configuration just type:

    % cd src
    % ./redis-server
    
If you want to provide your redis.conf, you have to run it using an additional
parameter (the path of the configuration file):

    % cd src
    % ./redis-server /path/to/redis.conf

It is possible to alter the Redis configuration passing parameters directly
as options using the command line. Examples:

    % ./redis-server --port 9999 --slaveof 127.0.0.1 6379
    % ./redis-server /etc/redis/6379.conf --loglevel debug

All the options in redis.conf are also supported as options using the command
line, with exactly the same name.

Playing with Redis
------------------

You can use redis-cli to play with Redis. Start a redis-server instance,
then in another terminal try the following:

    % cd src
    % ./redis-cli
    redis> ping
    PONG
    redis> set foo bar
    OK
    redis> get foo
    "bar"
    redis> incr mycounter
    (integer) 1
    redis> incr mycounter
    (integer) 2
    redis> 

You can find the list of all the available commands here:

    http://redis.io/commands

Installing Redis
-----------------

In order to install Redis binaries into /usr/local/bin just use:

    % make install

You can use "make PREFIX=/some/other/directory install" if you wish to use a
different destination.

Make install will just install binaries in your system, but will not configure
init scripts and configuration files in the appropriate place. This is not
needed if you want just to play a bit with Redis, but if you are installing
it the proper way for a production system, we have a script doing this
for Ubuntu and Debian systems:

    % cd utils
    % ./install_server.sh

The script will ask you a few questions and will setup everything you need
to run Redis properly as a background daemon that will start again on
system reboots.

You'll be able to stop and start Redis using the script named
/etc/init.d/redis_<portnumber>, for instance /etc/init.d/redis_6379.

Code contributions
---

Note: by contributing code to the Redis project in any form, including sending
a pull request via Github, a code fragment or patch via private email or
public discussion groups, you agree to release your code under the terms
of the BSD license that you can find in the COPYING file included in the Redis
source distribution.

Please see the CONTRIBUTING file in this source distribution for more
information.

Enjoy!
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