Lifting the Index Size Limit of Prometheus with Postings Compression
Prometheus’s TSDB (TimeSeries DataBase) stores the recent data in the memory and the old data on persistent storage in the form of blocks. Each block has its own index to map the series to the actual chunks that contain the data samples. During Google Summer of Code 2019, I mentored Alec Wang throughout this work on lifting the size limitations of the index mentioned above. The work described below is up for review and should be merged soon.