Add in support for segmented binary stream snapshots.#4284
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derekcollison merged 1 commit intodevfrom Jul 5, 2023
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Streams with many interior deletes was causing issues due to the fact that the interior deletes were represented as a sorted []uint64. This approach introduces 3 sub types of delete blocks, avl bitmask tree, a run length encoding, and the legacy format above. We also take into account large interior deletes such that on receiving a snapshot we can skip things we already know about. Signed-off-by: Derek Collison <derek@nats.io>
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I squashed the commits, good to merge? |
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Streams with many interior deletes was causing issues due to the fact that the interior deletes were represented as a sorted []uint64. This could cause snapshots for streams R>1 and with lots of interior deletes to take up more memory and cpu then we want.
This new approach introduces 3 sub types of delete blocks, an avl bitmask tree, a run length encoding, and the legacy format above. We also take into account large interior deletes such that on receiving a snapshot we can skip things we already know about.
Signed-off-by: Derek Collison derek@nats.io