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Example code of p3k/quartz-db

Informations about the package quartz-db

QuartzDB

A flat-file database optimized to hold time-series data.

When should I use this?

Some great uses for QuartzDB:

You should use this if...

API

Adding Records

This will add the entry always to the end of the appropriate file, since it is expected that data will be inserted in order. If you need to insert out of order, you can run the maintenance task to re-sort the date's file when needed.

Querying

Range

Last n records

Single Record

Maintenance

Filesystem

One file per day.

The base path of the database contains a "data" folder and "index" folder.

Files contain one record per line, separated by newlines. The first 26 characters are the date with microsecond precision, followed by a space, followed by the JSON record.

The ".meta" files are for storing information about the data file. Currently the only thing in the meta file is line 1 contains the number of lines in the data file.

There is also a file in the root of the data folder containing the date of the last date seen. This is for quickly retrieving the last n records in the database without having to search the filesystem for all files.

License

Copyright 2015-2017 by Aaron Parecki

QuartzDB is licensed under the Apache 2.0 license

All versions of quartz-db with dependencies

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