Files

copilot-swe-agent[bot] 481d5ae2e5 Replace LRU with W-TinyLFU cache eviction policy

Add Count-Min Sketch for frequency estimation and replace the single LRU
list with a W-TinyLFU policy using window, probation, and protected segments.
Update cache_tracker::touch() to use the new touch() method that handles
segment-aware promotion.

Co-authored-by: dorlaor <1735237+dorlaor@users.noreply.github.com>

2026-03-13 21:09:52 +00:00

advanced_rpc_compression_negotiation.tla

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advanced_rpc_compression.md

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api_v2.md

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audit.md

auth: use unified cache for permissions

2026-02-17 17:56:27 +01:00

backport.md

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building.md

build: replace tools/java submodule with packaged cassandra-stress

2025-04-15 10:11:28 +03:00

cdc.md

docs/dev: update CDC dev docs for tablets

2025-09-17 14:47:13 +02:00

code-coverage.md

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commitlog-file-format.md

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compaction_controller.md

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compilation-time-analysis.md

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cql3-type-mapping.md

docs: fix minor typo in docs/dev/cql3-type-mapping.md

2025-07-01 22:19:07 +05:30

cql-extensions-internal.md

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debugging.md

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describe_schema.md

tablet options: Add max_tablet_count tablet option to enforce tablet count upper bounds

2026-03-03 11:19:24 +03:00

docker-hub.md

doc: fix the license information on DockerHub

2025-12-23 15:53:06 +02:00

file_encryption.md

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hinted_handoff_design.md

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IDL.md

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isolation.md

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logging.md

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lua-type-mapping.md

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maintainer.md

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metrics.md

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migrating-from-users-to-roles.md

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modules.md

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mvcc.md

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object_storage.md

snapshot: keep per-sstable metadata in manifest.json

2026-01-22 09:42:52 +02:00

paged-queries.md

docs/paged-queries.md: update references to readers

2025-09-26 11:15:38 +03:00

parallel_aggregations.md

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per-partition-rate-limit.md

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protocol-extensions.md

protocol-extensions.md: Fix client_options docs

2026-01-13 11:49:00 +01:00

protocols.md

vector_store_client: rename embedding into vs_vector

2025-09-18 08:45:46 +03:00

raft-in-scylla.md

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reader-concurrency-semaphore.md

permit_reader: Add a new state: preemptive_aborted

2026-01-28 14:20:01 +01:00

README.md

Add repository layout dev documentation

2025-06-25 13:58:05 +03:00

repair_based_node_ops.md

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repository_layout.md

remove redis documentation

2025-08-20 17:53:23 +03:00

reverse-reads.md

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review-checklist.md

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row_cache.md

Replace LRU with W-TinyLFU cache eviction policy

2026-03-13 21:09:52 +00:00

row_level_repair.md

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rust.md

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secondary_index.md

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service_levels.md

docs/dev/service_levels: update docs to service levels on raft

2026-01-13 06:49:18 +02:00

size-based-load-balancing.md

docs: correct spelling errors in size based balancing docs

2026-01-16 17:41:57 +02:00

sstable-compression-dicts.md

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sstable-scylla-format.md

docs: document components_digests subcomponent and trailing digest in Scylla.db

2026-03-06 21:58:15 +01:00

sstables-directory-structure.md

docs: document components_digests subcomponent and trailing digest in Scylla.db

2026-03-06 21:58:15 +01:00

strong_consistency.md

docs: add strong consistency doc

2026-02-25 12:34:58 +01:00

system_keyspace.md

Docs: describe the system tables

2026-03-04 08:55:43 +02:00

system_schema_keyspace.md

schema_tables: Keep "replication" column backwards-compatible by expanding rack lists to numeric RF

2025-10-21 09:11:25 +03:00

task_manager.md

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testing.md

scylla_gdb: use persistent GDB - decrease test execution time

2026-01-29 10:01:39 +02:00

timestamp-conflict-resolution.md

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tombstone.md

treewide: fix spelling errors

2025-09-12 15:58:19 +03:00

topology-over-raft.md

doc: topology-over-raft.md: Fix diagram for replacing, tablet_draining is not engaged

2026-01-18 15:36:05 +01:00

tracing.md

Add table name to tracing in alternator

2025-11-21 09:33:40 +02:00

view-building-coordinator.md

docs/dev/view-building-coordinator: fix typos

2025-12-04 12:52:42 +01:00

virtual-tables.md

docs: virtual-tables: Fix instructions

2025-04-09 20:21:51 +02:00

README.md

Scylla developer documentation

This folder contains developer-oriented documentation concerning the ScyllaDB codebase. We also have a wiki, which contains additional developer-oriented documentation. There is currently no clear definition of what goes where, so when looking for something be sure to check both.

Seastar documentation can be found here.

User documentation can be found on docs.scylladb.com

For information on how to build Scylla and how to contribute visit HACKING.md and CONTRIBUTING.md.

Index

Module list and dependencies

Repository layout and short summary of components