Column Names 55 Managing and Accessing Data in Cassandra 55 About Writes in Cassandra 55 About Compaction 55 About Transactions and Concurrency Control 55 About Inserts and Updates 56 About Deletes 72 compaction_preheat_key_cache 72 compaction_throughput_mb_per_sec 72 concurrent_compactors 72 concurrent_reads 72 concurrent_writes 72 flush_largest_memtables_at 73 in_memory_compaction_limit_in_mb memtable_flush_queue_size 73 memtable_flush_writers 73 memtable_total_space_in_mb 73 multithreaded_compaction 73 reduce_cache_capacity_to 73 reduce_cache_sizes_at 73 sliced_buffer_size_in_kb 74 stream

47 © 2022 Cloudera, Inc. All rights reserved. SNAPSHOT DIFF : ROCKSDB COMPACTIONS ● RocksDB compaction keeps compacting existing SST files into new files - 48 © 2022 Cloudera, Inc. All rights reserved Cloudera, Inc. All rights reserved. Active Object Store Snapshot 2 Snapshot 1 SNAPSHOT DIFF : COMPACTION DAG 007.sst 008.sst 009.sst 010.sst 011.sst 012.sst 013.sst 010.sst 011.sst 012.sst SnapDiff reserved. SNAPSHOT DIFF : Overall Picture Ozone Manager : Generate Compaction DAG In-Memory Compaction DAG Persisted Compaction DAG SnapDiff Handler Find SST files that are different Filter