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6b4cdacf41
Summary: Add flags `overwrite_probability` and `overwrite_window_size` flag to `db_bench`. Add the possibility of performing a `filluniquerandom` benchmark with an overwrite probability. For each write operation, there is a probability _p_ that the write is an overwrite (_p_=`overwrite_probability`). When an overwrite is decided, the key is randomly chosen from the last _N_ keys previously inserted into the DB (with _N_=`overwrite_window_size`). When a pure write is decided, the key inserted into the DB is unique and therefore will not be an overwrite. The `overwrite_window_size` is used so that the user can decide if the overwrite are mostly targeting recently inserted keys (when `overwrite_window_size` is small compared to the total number of writes), or can also target keys inserted "a long time ago" (when `overwrite_window_size` is comparable to total number of writes). Note that total number of writes = # of unique insertions + # of overwrites. No unit test specifically added. Local testing show the following **throughputs** for `filluniquerandom` with 1M total writes: - bypass the code inserts (no `overwrite_probability` flag specified): ~14.0MB/s - `overwrite_probability=0.99`, `overwrite_window_size=10`: ~17.0MB/s - `overwrite_probability=0.10`, `overwrite_window_size=10`: ~14.0MB/s - `overwrite_probability=0.99`, `overwrite_window_size=1M`: ~14.5MB/s - `overwrite_probability=0.10`, `overwrite_window_size=1M`: ~14.0MB/s Pull Request resolved: https://github.com/facebook/rocksdb/pull/8569 Reviewed By: pdillinger Differential Revision: D29818631 Pulled By: bjlemaire fbshipit-source-id: d472b4ea4e457a4da7c4ee4f14b40cccd6a4587a |
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.. | ||
advisor | ||
block_cache_analyzer | ||
dump | ||
rdb | ||
analyze_txn_stress_test.sh | ||
auto_sanity_test.sh | ||
backup_db.sh | ||
benchmark.sh | ||
benchmark_leveldb.sh | ||
blob_dump.cc | ||
check_all_python.py | ||
check_format_compatible.sh | ||
CMakeLists.txt | ||
db_bench.cc | ||
db_bench_tool.cc | ||
db_bench_tool_test.cc | ||
db_crashtest.py | ||
db_repl_stress.cc | ||
db_sanity_test.cc | ||
dbench_monitor | ||
Dockerfile | ||
generate_random_db.sh | ||
ingest_external_sst.sh | ||
io_tracer_parser.cc | ||
io_tracer_parser_test.cc | ||
io_tracer_parser_tool.cc | ||
io_tracer_parser_tool.h | ||
ldb.cc | ||
ldb_cmd.cc | ||
ldb_cmd_impl.h | ||
ldb_cmd_test.cc | ||
ldb_test.py | ||
ldb_tool.cc | ||
pflag | ||
reduce_levels_test.cc | ||
regression_test.sh | ||
report_lite_binary_size.sh | ||
restore_db.sh | ||
rocksdb_dump_test.sh | ||
run_flash_bench.sh | ||
run_leveldb.sh | ||
sample-dump.dmp | ||
simulated_hybrid_file_system.cc | ||
simulated_hybrid_file_system.h | ||
sst_dump.cc | ||
sst_dump_test.cc | ||
sst_dump_tool.cc | ||
trace_analyzer.cc | ||
trace_analyzer_test.cc | ||
trace_analyzer_tool.cc | ||
trace_analyzer_tool.h | ||
verify_random_db.sh | ||
write_external_sst.sh | ||
write_stress.cc | ||
write_stress_runner.py |