arrakis-backend-frames

Frame backend for Arrakis server

Frame backend for the Arrakis server, part of the LIGO next-generation data delivery (NGDD) project. Serves historical detector data over Apache Arrow Flight from multi-year archives of Gravitational-Wave Frame (.gwf) files, read with gwframe.

Resources

Installation

With pip:

pip install arrakis-backend-frames

With Docker:

docker run --net=host -it containers.ligo.org/ngdd/backends/arrakis-backend-frames:main

Features

Serves historical timeseries from .gwf frame archives over Apache Arrow Flight
Query planner that turns channel and time-range requests into a minimal set of frame reads
Metadata-server integration to discover channels and track their frame types over time
Locates frames through a diskcache service, so the backend never indexes the archive itself
Optional in-process or memcached-backed caching of decoded channel data
Gap-aware responses that return masked data for missing samples

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