santosh79/remixdb

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Key/Value Store focussed on Concurrency and Distribution Primitives

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README.md

Original

Remixdb

A Redis Protocol Compliant NoSQL database targeting Concurrency

RemixDB is a distributed NoSQL database, that implements the Redis protocol, built on the legendary Erlang VM. It aims for matching all of the performance of Redis while leveraging all of the good Systems Tooling of the BEAM VM - High Availability and High Throughput.

How fast is this?

It's Fast! Pretty close to matching redis in terms of performance.

Here are some results of running redis-benchmark on an early 2023 M1 iMac:

redis-benchmark -h 0.0.0.0 -t get -n 100000 -r 100000000 -c 100
GET: rps=0.0 (overall: nan) avg_msec=nan (overall: nan)
GET: rps=103820.0 (overall: 103820.0) avg_msec=0.596 (overall: 0.596)
GET: rps=117300.0 (overall: 110560.0) avg_msec=0.534 (overall: 0.563)
GET: rps=110263.0 (overall: 110460.7) avg_msec=0.528 (overall: 0.551)
====== GET ======
  100000 requests completed in 0.93 seconds
  100 parallel clients
  3 bytes payload
  keep alive: 1
  host configuration "save": 3600 1 300 100 60 10000
  host configuration "appendonly": 3600 1 300 100 60 10000
  multi-thread: no

Latency by percentile distribution:
0.000% <= 0.111 milliseconds (cumulative count 1)
50.000% <= 0.503 milliseconds (cumulative count 50210)
75.000% <= 0.631 milliseconds (cumulative count 75658)
87.500% <= 0.743 milliseconds (cumulative count 87767)
93.750% <= 0.855 milliseconds (cumulative count 93920)
96.875% <= 0.991 milliseconds (cumulative count 96948)
98.438% <= 1.327 milliseconds (cumulative count 98439)
99.219% <= 1.791 milliseconds (cumulative count 99251)
99.609% <= 1.831 milliseconds (cumulative count 99665)
99.805% <= 1.855 milliseconds (cumulative count 99834)
99.902% <= 1.871 milliseconds (cumulative count 99913)
99.951% <= 1.887 milliseconds (cumulative count 99954)
99.976% <= 1.951 milliseconds (cumulative count 99978)
99.988% <= 2.111 milliseconds (cumulative count 99988)
99.994% <= 2.263 milliseconds (cumulative count 99994)
99.997% <= 2.327 milliseconds (cumulative count 99997)
99.998% <= 2.343 milliseconds (cumulative count 99999)
99.999% <= 2.359 milliseconds (cumulative count 100000)
100.000% <= 2.359 milliseconds (cumulative count 100000)

Cumulative distribution of latencies:
0.000% <= 0.103 milliseconds (cumulative count 0)
0.038% <= 0.207 milliseconds (cumulative count 38)
0.512% <= 0.303 milliseconds (cumulative count 512)
16.193% <= 0.407 milliseconds (cumulative count 16193)
50.210% <= 0.503 milliseconds (cumulative count 50210)
71.931% <= 0.607 milliseconds (cumulative count 71931)
84.372% <= 0.703 milliseconds (cumulative count 84372)
91.815% <= 0.807 milliseconds (cumulative count 91815)
95.445% <= 0.903 milliseconds (cumulative count 95445)
97.114% <= 1.007 milliseconds (cumulative count 97114)
97.835% <= 1.103 milliseconds (cumulative count 97835)
98.252% <= 1.207 milliseconds (cumulative count 98252)
98.412% <= 1.303 milliseconds (cumulative count 98412)
98.512% <= 1.407 milliseconds (cumulative count 98512)
98.653% <= 1.503 milliseconds (cumulative count 98653)
98.776% <= 1.607 milliseconds (cumulative count 98776)
98.858% <= 1.703 milliseconds (cumulative count 98858)
99.411% <= 1.807 milliseconds (cumulative count 99411)
99.968% <= 1.903 milliseconds (cumulative count 99968)
99.982% <= 2.007 milliseconds (cumulative count 99982)
99.986% <= 2.103 milliseconds (cumulative count 99986)
100.000% <= 3.103 milliseconds (cumulative count 100000)

Summary:
  throughput summary: 107181.13 requests per second
  latency summary (msec):
          avg       min       p50       p95       p99       max
        0.560     0.104     0.503     0.887     1.759     2.359

How do I play with this?

Docker is the preferred way to run this:

docker container run -d --rm -p 6379:6379 --name remixdb santoshdocker2021/remixdb:latest

NO docker, then:

git clone https://github.com/santosh79/remixdb
mix release
_build/dev/rel/remixdb/bin/remixdb start

You don't need any drivers - this should work with your redis drivers.

Why do this?

We need Databases that are fault-tolerant, highly available and that can scale and take FULL advantage of the latest in Hardware specs (more cores). The Erlang VM is uniquely positioned to do this and this Database is an effort to prove it! :)

Status

This library is still being worked on, so it does NOT support all of redis' commands -- that being said, the plan is to get it to full compliance with Redis' single server commands, ASAP. Redis Cluster is something I do not believe in - since I do not understand the Availability Guarantees it provides.

Module Architecture

                        +-------------------+
                        |    Client App     |
                        +---------+---------+
                                  |
                                  | TCP/Redis Protocol
                                  v
+----------------------------------------------------------------+
|                   Remixdb Application                          |
|  +-------------------+            +-------------------+        |
|  |    TCP Server     |<---------->|   Redis Parser    |        |
|  +---------+---------+            +---------+---------+        |
|            |                              |                    |
|            |    Parsed Commands           |                    |
|            v                              v                    |
|    +-----------------------------------------------+           |
|    |               Command Router                 |            |
|    +----------------------+-----------------------+            |
|           |            |             |         |               |
|           v            v             v         v               |
|    +-----------+  +-----------+  +-----------+  +-----------+  |
|    |  String   |  |   Hash    |  |   List    |  |    Set    |  |
|    |  Module   |  |  Module   |  |  Module   |  |  Module   |  |
|    +-----+-----+  +-----+-----+  +-----+-----+  +-----+-----+  |
|           |            |             |               |         |
|           |            |             |               |         |
|           v            v             v               v         |
|    +-----------------------------------------------+           |
|    |            Data Storage Layer                 |           |
|    |   (GenServer state and/or ETS tables)         |           |
|    +-----------------------------------------------+           |
+----------------------------------------------------------------+
                            ^
                            | Supervised by
                            v
+---------------------------------------------------------------+
|                     Supervision Tree                          |
|                                                               |
|    +------------------------+                                 |
|    |   Remixdb Supervisor   |                                 |
|    +-----------+------------+                                 |
|                |                                              |
|         +------+-----+                                        |
|         |            |                                        |
|         v            v                                        |
|    +----------+   +---------------------------+               |
|    | TcpServer|   | Datastructures Supervisor |               |
|    |          |   +-----------+---------------+               |
|    +----------+               |                               |
|                      +--------+--------+                      |
|                      |        |        |                      |
|                      v        v        v                      |
|                  +--------+ +--------+ +----------+           |
|                  | String | |  Hash  | | List/Set |           |
|                  +--------+ +--------+ +----------+           |
+---------------------------------------------------------------+
                               |
                               | Uses
                               v
+---------------------------------------------------------------+
|                      Utility Modules                          |
|    +----------+   +----------+   +---------------------+      |
|    | Renamer  |   | Counter  |   |  Other Utilities    |      |
|    +----------+   +----------+   +---------------------+      |
+---------------------------------------------------------------+

+---------------------------------------------------------------+
|                     Benchmark Suite                           |
|        (Independent tools for measuring performance)          |
+---------------------------------------------------------------+

Clustering and Master Read Replica setup with Automatic Failover

This will happen, soon!

Missing commands

RENAMENX
Expiry and TTL commands
Sorted sets
Bitmaps & HyperLogLogs
Blocking commands
Pub Sub commands
LUA scripting

Author

Santosh Kumar :: [email protected] :: @santosh79