HQuant-State
Summary
An in-memory time-series database written over AcidState, with on-disk or Amazon S3 archival support
HQuant-State is a time series database for HQuant, meant to store historical stock and option quotes and historical balances and incomes. It is meant to be run as a separate service, and it is expected that it will be written to by a DEQ client handling a quote stream (perhaps from hdeq-tradeking or some other stock data provider).
HQuant-State is a hybrid in-memory/persistent storage database. Due to the nature of time series, it is append only, meaning that it can make several optimizations that other databases can’t. Most notably, it only keeps a set amount of historical data in memory, and puts the rest into storage somewhere else. Currently, this storage can be either the local disk or an Amazon S3 bucket. This behavior is entirely configurable.
Configuration File
There is an example configuration file in the Git repository at config.example. More documentation coming!
Potential Uses
- Finance (DIME was originally made for my stock monitoring activities)
- Large sensor networks/Internet of Things
- Data warehousing of historical load data, link clicks, etc.
Questions, Bugs, and Comments
Redirect any questions, bugs, comments, and/or complaints to me. Please be nice, I don’t do this for money :)
I hope you enjoy using this software.