github.com/m3db/m3@v1.5.0/src/dbnode/storage/index/README.md (about)

     1  # index
     2  
     3  Index related documentation.
     4  
     5  ## In-memory index cold flush consistency model
     6  
     7  Index writes go into the active cold mutable segment when an index block is sealed. Index blocks are sealed during ticks when they are a full index block past buffer past + block size.
     8  
     9  At the beginning of a cold flush we rotate out the active cold mutable segment. In-mem index writes are then evicted from mem when a cold flush completes and they are evicted.