2022-01-27 redis cluster cluster proxy predixy analysis

Catalog

Abstract :

redis The selection basis of cluster agent :

predixy explain :

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Abstract :

in the light of redis-cluster The front-end agent of the cluster , Explain the reason for choosing this component

redis The selection basis of cluster agent :

1. Stability has been verified by other companies in the industry , Mature open source components
2. The performance test data meets the requirements ; TODO: The performance requirement data is ?
3. Support relatively more redis command
   1. Batch key operation , Basic mset/mget
   2. Other batch commands
4. Lightweight , Easy to integrate into the cloud platform , And make function customization

predixy explain :

Code address : https://github.com/joyieldInc/predixy
explain : https://github.com/joyieldInc/predixy/blob/1.0.5/README_CN.md

Support command list : https://github.com/joyieldInc/predixy/blob/1.0.5/src/Command.h 

1. Different cluster modes on the back end , There are differences in command support

Performance test data : https://github.com/joyieldInc/predixy/blob/1.0.5/doc/bench/redis/benchmark_with_redis_CN.md

Industry usage :

1. redis The official recommendation of cluster agent : Redis
2. Xiaomi cloud redis Use : millet Redis Of Kubernetes Containerized deployment practices - DockOne.io

Fault condition :

1. All static in the configuration redis All nodes are offline , Will lead to predixy Agent not available

characteristic :

+ High performance and lightweight + Multithreading support + Multi platform support ：Linux、OSX、BSD、Windows([Cygwin](http://www.cygwin.com/)) + Support Redis Sentinel, One or more groups can be configured redis + Support Redis Cluster + Support redis Blocking command , Include blpop、brpop、brpoplpush + Support scan command , Whether it's single redis There are still more than one. redis All instances support + many key Command support : mset/msetnx/mget/del/unlink/touch/exists + Support redis Multiple databases , You can use select command + Support transactions , Currently limited to Redis Sentinel Place an order redis Group available + Support script , Including orders ：script load、eval、evalsha + Support publish subscribe mechanism , That is to say Pub/Sub Series of commands + Multi data center support , Read write separation support + Extended AUTH command , Powerful reading 、 Write 、 Management authority control mechanism , Healthy space restriction mechanism + Logs can be sampled and output by level , Asynchronous logging prevents threads from being io Blocking + Log files can be sorted by time 、 Automatic size segmentation + Rich statistical information , Include CPU、 Memory 、 request 、 Response and other information + Delay monitoring information , You can see the overall delay , Sub back end redis Instance delay

predixy Deployment way ：

1. because proxy No state , Multi node deployment proxy colony
2. proxy It is recommended to enable multithreading , The number of threads is set to ？
3. proxy Cluster high availability solution , Existing miniSLB
4. predixy Static configured in redis node , At least one must survive , Otherwise, it will lead to predixy Unavailable