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Predixy 中文版

Predixy is a high performance and fully featured proxy for redis sentinel and redis cluster

Features

  • High performance and lightweight.
  • Multi-threads support.
  • Works on Linux, OSX, BSD, Windows(Cygwin).
  • Supports Redis Sentinel, single/multi redis group[s].
  • Supports Redis Cluster.
  • Supports redis block command, eg:blpop, brpop, brpoplpush.
  • Supports scan command, even multi redis instances.
  • Multi-keys command support: mset/msetnx/mget/del/unlink/touch/exists.
  • Multi-databases support, means redis command select is avaliable.
  • Supports redis transaction, limit in Redis Sentinel single redis group.
  • Supports redis Scripts, script load, eval, evalsha.
  • Supports redis Pub/Sub.
  • Multi-DataCenters support, read from slaves.
  • Extend AUTH, readonly/readwrite/admin permission, keyspace limit.
  • Log level sample, async log record.
  • Log file auto rotate by time and/or file size.
  • Stats info, CPU/Memory/Requests/Responses and so on.
  • Latency monitor.

Build

Predixy can be compiled and used on Linux, OSX, BSD, Windows(Cygwin). Requires C++11 compiler.

It is as simple as:

$ make

To build in debug mode:

$ make debug

Some other build options:

  • CXX=c++compiler, default is g++, you can specify other, eg:CXX=clang++
  • EV=epoll|poll|kqueue, default it is auto detect according by platform.
  • MT=false, disable multi-threads support.
  • TS=true, enable predixy function call time stats, debug only for developer.

For examples:

$ make CXX=clang++
$ make EV=poll
$ make MT=false
$ make debug MT=false TS=true

Install

Just copy src/predixy to the install path

$ cp src/predixy /path/to/bin

Configuration

See below files:

  • predixy.conf, basic config, will refrence below config files.
  • cluster.conf, Redis Cluster backend config.
  • sentinel.conf, Redis Sentinel backend config.
  • auth.conf, authority control config.
  • dc.conf, multi-datacenters config.
  • latency.conf, latency monitor config.

Running

$ src/predixy conf/predixy.conf

With default predixy.conf, Predixy will listen at 0.0.0.0:7617 and proxy to Redis Cluster 127.0.0.1:6379. In general, 127.0.0.1:6379 is not running in Redis Cluster mode. So you will look mass log output, but you can still test it with redis-cli.

$ redis-cli -p 7617 info

More command line arguments:

$ src/predixy -h

Stats

Like redis, predixy use INFO command to give stats.

Show predixy running info and latency monitors

redis> INFO

Show latency monitors by latency name

redis> INFO Latency <latency-name>

A latency monitor example:

LatencyMonitorName:all
            latency(us)   sum(us)           counts
<=          100              3769836            91339 91.34%
<=          200               777185             5900 97.24%
<=          300               287565             1181 98.42%
<=          400               185891              537 98.96%
<=          500               132773              299 99.26%
<=          600                85050              156 99.41%
<=          700                85455              133 99.54%
<=          800                40088               54 99.60%
<=         1000                67788               77 99.68%
>          1000               601012              325 100.00%
T            60              6032643           100001
The last line is total summary, 60 is average latency(us)

Show latency monitors by server address and latency name

redis> INFO ServerLatency <server-address> [latency-name]

Reset all stats and latency monitors, require admin permission.

redis> CONFIG ResetStat

Benchmark

predixy is fast, how fast? more than twemproxy, codis, redis-cerberus

See wiki benchmark

License

Copyright (C) 2017 Joyield, Inc. <joyield.com#gmail.com>

All rights reserved.

License under BSD 3-clause "New" or "Revised" License

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