runtime-args.md

Runtime arguments

CCBench binaries use gflags and glog, so every flag has a default and any subset can be overridden on the command line. The full list for a given binary is always available via:

./silo.exe -help

Common YCSB-style flags

These are shared by most protocols. Defaults differ per protocol — check -help.

Flag	Meaning
-thread_num	Number of worker threads.
-tuple_num	Total number of records.
-max_ope	Operations per transaction.
-rratio	Read ratio of a single transaction (0–100).
-rmw	If set, reads are followed by a write to the same key (read-modify-write).
-ycsb	If set, run the YCSB workload.
-zipf_skew	Zipf skew in [0, 1). 0 is uniform.
-extime	Execution time in seconds.
-epoch_time	Epoch interval in milliseconds (epoch-based protocols).
-clocks_per_us	Calibration: TSC ticks per microsecond on the host CPU.

Examples

Silo:

numactl --interleave=all ./silo.exe \
  -clocks_per_us=2100 -epoch_time=40 -extime=3 \
  -max_ope=10 -rmw=0 -rratio=50 -thread_num=224 \
  -tuple_num=1000000 -ycsb=1 -zipf_skew=0

Cicada (extra flags for WAL, GC, version pre-reservation):

numactl --interleave=all ./cicada.exe \
  -tuple_num=1000 -max_ope=10 -thread_num=224 \
  -rratio=100 -rmw=0 -zipf_skew=0 -ycsb=1 \
  -p_wal=0 -s_wal=0 -clocks_per_us=2100 \
  -io_time_ns=5 -group_commit_timeout_us=2 -group_commit=0 \
  -gc_inter_us=10 -pre_reserve_version=10000 \
  -worker1_insert_delay_rphase_us=0 -extime=3

Each protocol's README.md has its own canonical example.