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
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Redis on Windows prototype

What's new in this release

  • Important note: we have changed our branch names to make it clear which is the main branch, and the Redis version the branch is based on.
  • Now have x64 version as well as 32 bit versions.
  • For the 64 bit version, there is a limit of 2^32 objects in a structure, and a max length of 2^32 for any object
  • Version number now 2.4.11-pre1 to indicate prerelease and to enable changing
  • The code to write data over TCP has been improved. Replication under stress is now more reliable.
  • Fixes for a few reported issues.

From previous releases

  • Based on Redis 2.4.11
  • Removed dependency on the pthreads library
  • Improved the snapshotting (save on disk) algorithm. Implemented Copy-On-Write at the application level so snapshotting behavior is similar to the Linux version.
  • added a Windows service to start and monitor one of more Redis instances

=== Special thanks to Dušan Majkic (, for his project on GitHub that gave us the opportunity to quickly learn some on the intricacies of Redis code. His project also helped us to build our prototype quickly.

Repo branches

  • 2.4: (formerly bksavecow) Copy On Write at the application level, now the default branch. Has lower latency than bksave.
  • 2.4_fgsave: (formerly 2.4) Saving is done in foreground
  • 2.4_bufsave: (formerly bksave) Background save where we write the data to buffers first, then save to disk on a background thread. It is much faster than saving directly to disk, but it uses more memory.

How to build Redis using Visual Studio

You can use the free Express Edition available at

Now 2.4 is the default branch.

  • Open the solution file msvs\redisserver.sln in Visual Studio 10, select platform (win32 or x64) and build.

    This should create the following executables in the msvs$(Configuration) folder:

    • redis-server.exe
    • redis-benchmark.exe
    • redis-cli.exe
    • redis-check-dump.exe
    • redis-check-aof.exe

For your convinience all binaries and the MSI for the Redis-Watcher service will be available in the msvs/bin/release|debug directories.


A Windows Service that can be used to start and monitor one or more Redis instances, the service monitors the processes and restart them if they stop.

You can find the project to build the service under the msvs\RedisWatcher directory. In the readme on the same location you will find the instructions on how to build and use the service.


An installer to deploy Redis to Windows Azure. Source and binaries are in msvs/RedisWAInst. See the README file there for details.

Release Notes

This is a pre-release version of the software. It has been undergone more testing than previous releases.

To run the Redis test suite requires some manual work:

  • The tests assume that the binaries are in the src folder, so you need to copy the binaries from the msvs folder to src.
  • The tests make use of TCL. This must be installed separately.
  • To run the tests you need to have a Unix shell on your machine. To execute the tests, run the following command: tclsh8.5.exe tests/test_helper.tcl.

If a Unix shell is not installed you may see the following error message: "couldn't execute "cat": no such file or directory".

Plan for the next release

  • Improve test coverage
  • Fix some performance issues on the Copy On Write code