SeismicDB

crate	docs.rs	crate.io
seismicdb
sdb-core
sdb-server-core
sdb-cli

SeismicDB is a fast, highly compressed standalone database and streaming protocol for order book ticks.

SeismicDB Is forked from the inactive, but briliant TectonicDB. https://github.com/0b01/tectonicdb

Why

• Uses a simple and efficient binary file format: Dense Tick Format(DTF)

• Stores order book tick data tuple of shape: (timestamp, seq, is_trade, is_bid, price, size).

• Sorted by timestamp + seq

• 12 bytes per orderbook event

• 600,000 inserts per thread second

Installation

There are several ways to install seismicdb.

1. Binaries

Binaries are available for download. Make sure to put the path to the binary into your PATH. Currently only build is for Linux x86_64.

2. Crates

cargo install seismicdb

This command will download sdb, sdb-server, dtftools binaries from crates.io and build locally.

3. GitHub

To contribute you will need the copy of the source code on your local machine.

git clone https://github.com/alice-comfy/SeismicDB
cd seismicdb
cargo build --release
cargo run --release sdb-server

The binaries can be found under target/release.

How to use

It's very easy to setup.

./sdb-server --help

For example:

./sdb-server -vv -a -i 10000
# run the server on INFO verbosity
# turn on autoflush for every 10000 inserts per orderbook

Configuration

To config the Google Cloud Storage and Data Collection Backend integration, the following environment variables are used:

Client API

Data commands

USE [dbname]
ADD [ts], [seq], [is_trade], [is_bid], [price], [size];
INSERT 1505177459.685, 139010, t, f, 0.0703620, 7.65064240; INTO dbname

Monitoring

TectonicDB supports monitoring/alerting by periodically sending its usage info to an InfluxDB instance:

    --influx-db <influx_db>                        influxdb db
    --influx-host <influx_host>                    influxdb host
    --influx-log-interval <influx_log_interval>    influxdb log interval in seconds (default is 60)

As a concrete example,

...
$ influx
> CREATE DATABASE market_data;
> ^D
$ sdb --influx-db market_data --influx-host http://localhost:8086 --influx-log-interval 20
...

TectonicDB will send field values disk={COUNT_DISK},size={COUNT_MEM} with tag ob={ORDERBOOK} to market_data measurement which is the same as the dbname.

Additionally, you can query usage information directly with INFO and PERF commands:

1. INFO reports the current tick count in memory and on disk.

2. PERF returns recorded tick count history whose granularity can be configured.

Logging

Log file defaults to sdb.log.

Testing

export RUST_TEST_THREADS=1
cargo test

Tests must be run sequentially because some tests depend on dtf files that other tests generate.

Benchmark

sdb client comes with a benchmark mode. This command inserts 1M records into the sdb.

sdb -b 1000000

Using dtf files

Seismic comes with a commandline tool dtfcat to inspect the file metadata and all the stored events into either JSON or CSV.

Options:

USAGE:
    dtfcat [FLAGS] --input <INPUT>

FLAGS:
    -c, --csv         output csv
    -h, --help        Prints help information
    -m, --metadata    read only the metadata
    -V, --version     Prints version information

OPTIONS:
    -i, --input <INPUT>    file to read

As a library

It is possible to use the Dense Tick Format streaming protocol / file format in a different application. Works nicely with any buffer implementing the Write trait.

Requirements

TectonicDB is a standalone service.

• Linux

• macOS

Language bindings:

• TypeScript

• Rust

• Python

• JavaScript

Additional Features

• Usage statistics like Cloud SQL

• Commandline inspection tool for dtf file format

• Logging

• Query by timestamp

Changelog

• 0.6.0: First seismicDB Fork release. Upgraded dependencies and rust version to 2021 / latest versions. Rebrand and release new version on crates.io.
• 0.5.0: InfluxDB monitoring plugin and improved command line arguments
• 0.4.0: iterator-based APIs for handling DTF files and various quality of life improvements
• 0.3.0: Refactor to async