rocksdb/tools/run_flash_bench.sh

#!/bin/bash
# REQUIRE: benchmark.sh exists in the current directory
# After execution of this script, log files are generated in $output_dir.
# report.txt provides a high level statistics

# This should be run from the parent of the tools directory. The command line is:
#   [$env_vars] tools/run_flash_bench.sh [list-of-threads]
#
# This runs a sequence of tests in the following sequence:
#   step 1) load - bulkload, compact, fillseq, overwrite
#   step 2) read-only for each number of threads
#   step 3) read-write for each number of threads
#   step 4) merge for each number of threads
#
# The list of threads is optional and when not set is equivalent to "24". 
# Were list-of-threads specified as "1 2 4" then the tests in steps 2, 3 and
# 4 above would be repeated for 1, 2 and 4 threads. The tests in step 1 are
# only run for 1 thread.

# Test output is written to $OUTPUT_DIR, currently /tmp/output. The performance
# summary is in $OUTPUT_DIR/report.txt. There is one file in $OUTPUT_DIR per
# test and the tests are listed below.
#
# The environment variables are also optional. The variables are:
#   NKEYS         - number of key/value pairs to load
#   NWRITESPERSEC - the writes/second rate limit for the *whilewriting* tests.
#                   If this is too large then the non-writer threads can get
#                   starved.
#   NSECONDS      - number of seconds for which to run each test in steps 2,
#                   3 and 4. There are currently 15 tests in those steps and
#                   they are repeated for each entry in list-of-threads so
#                   this variable lets you control the total duration to
#                   finish the benchmark.
#   RANGE_LIMIT   - the number of rows to read per range query for tests that
#                   do range queries.
#   VAL_SIZE      - the length of the value in the key/value pairs loaded.
#                   You can estimate the size of the test database from this,
#                   NKEYS and the compression rate (--compression_ratio) set
#                   in tools/benchmark.sh
#   CACHE_BYTES   - the size of the RocksDB block cache in bytes
#   DATA_DIR      - directory in which to create database files
#   LOG_DIR       - directory in which to create WAL files, may be the same
#                   as DATA_DIR
#   DO_SETUP      - when set to 0 then a backup of the database is copied from
#                   $DATA_DIR.bak to $DATA_DIR and the load tests from step 1
#                   The WAL directory is also copied from a backup if
#                   DATA_DIR != LOG_DIR. This allows tests from steps 2, 3, 4
#                   to be repeated faster.
#   SAVE_SETUP    - saves a copy of the database at the end of step 1 to
#                   $DATA_DIR.bak. When LOG_DIR != DATA_DIR then it is copied
#                   to $LOG_DIR.bak.

# Size constants
K=1024
M=$((1024 * K))
G=$((1024 * M))

num_keys=${NKEYS:-$((1 * G))}
wps=${NWRITESPERSEC:-$((10 * K))}
duration=${NSECONDS:-$((60 * 60))}
nps=${RANGE_LIMIT:-10}
vs=${VAL_SIZE:-400}
cs=${CACHE_BYTES:-$(( 1 * G ))}

# If no command line arguments then run for 24 threads.
if [[ $# -eq 0 ]]; then
  nthreads=( 24 )
else
  nthreads=( "$@" )
fi

for num_thr in "${nthreads[@]}" ; do
  echo Will run for $num_thr threads
done

# Update these parameters before execution !!!
db_dir=${DATA_DIR:-"/tmp/rocksdb/"}
wal_dir=${LOG_DIR:-"/tmp/rocksdb/"}

do_setup=${DO_SETUP:-1}
save_setup=${SAVE_SETUP:-0}

output_dir="/tmp/output"

ARGS="\
OUTPUT_DIR=$output_dir \
NUM_KEYS=$num_keys \
DB_DIR=$db_dir \
WAL_DIR=$wal_dir \
VALUE_SIZE=$vs \
CACHE_SIZE=$cs"

mkdir -p $output_dir
echo -e "ops/sec\tmb/sec\tL0_GB\tSum_GB\tW-Amp\tW-MB/s\tusec/op\tp50\tp75\tp99\tUptime\tStall-time\tStall%\tTest" \
  > $output_dir/report.txt

# Notes on test sequence:
#   step 1) Setup database via sequential fill followed by overwrite to fragment it.
#           Done without setting DURATION to make sure that overwrite does $num_keys writes
#   step 2) read-only tests for all levels of concurrency requested
#   step 3) non read-only tests for all levels of concurrency requested
#   step 4) merge tests for all levels of concurrency requested. These must come last.

###### Setup the database

if [[ $do_setup != 0 ]]; then
  echo Doing setup

  # Test 1: bulk load
  env $ARGS ./tools/benchmark.sh bulkload

  # Test 2: sequential fill
  env $ARGS ./tools/benchmark.sh fillseq

  # Test 3: single-threaded overwrite
  env $ARGS NUM_THREADS=1 DB_BENCH_NO_SYNC=1 ./tools/benchmark.sh overwrite

else
  echo Restoring from backup

  rm -rf $db_dir

  if [ ! -d ${db_dir}.bak ]; then
    echo Database backup does not exist at ${db_dir}.bak
    exit -1
  fi

  echo Restore database from ${db_dir}.bak
  cp -p -r ${db_dir}.bak $db_dir

  if [[ $db_dir != $wal_dir ]]; then
    rm -rf $wal_dir

    if [ ! -d ${wal_dir}.bak ]; then
      echo WAL backup does not exist at ${wal_dir}.bak
      exit -1
    fi

    echo Restore WAL from ${wal_dir}.bak
    cp -p -r ${wal_dir}.bak $wal_dir
  fi
fi

if [[ $save_setup != 0 ]]; then
  echo Save database to ${db_dir}.bak
  cp -p -r $db_dir ${db_dir}.bak

  if [[ $db_dir != $wal_dir ]]; then
    echo Save WAL to ${wal_dir}.bak
    cp -p -r $wal_dir ${wal_dir}.bak
  fi
fi

###### Read-only tests

for num_thr in "${nthreads[@]}" ; do
  # Test 4: random read
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr ./tools/benchmark.sh readrandom

  # Test 5: random range scans
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr NUM_NEXTS_PER_SEEK=$nps \
    ./tools/benchmark.sh fwdrange

  # Test 6: random reverse range scans
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr NUM_NEXTS_PER_SEEK=$nps \
    ./tools/benchmark.sh revrange
done

###### Non read-only tests

for num_thr in "${nthreads[@]}" ; do
  # Test 7: overwrite with sync=0
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr DB_BENCH_NO_SYNC=1 \
    ./tools/benchmark.sh overwrite

  # Test 8: overwrite with sync=1
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr ./tools/benchmark.sh overwrite

  # Test 9: random update with sync=0
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr DB_BENCH_NO_SYNC=1 \
    ./tools/benchmark.sh updaterandom

  # Test 10: random update with sync=1
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr ./tools/benchmark.sh updaterandom

  # Test 11: random read while writing
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr WRITES_PER_SECOND=$wps \
    ./tools/benchmark.sh readwhilewriting

  # Test 12: range scan while writing
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr WRITES_PER_SECOND=$wps \
    NUM_NEXTS_PER_SEEK=$nps ./tools/benchmark.sh fwdrangewhilewriting

  # Test 13: reverse range scan while writing
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr WRITES_PER_SECOND=$wps \
    NUM_NEXTS_PER_SEEK=$nps ./tools/benchmark.sh revrangewhilewriting
done

###### Merge tests

for num_thr in "${nthreads[@]}" ; do
  # Test 14: random merge with sync=0
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr DB_BENCH_NO_SYNC=1 \
    ./tools/benchmark.sh mergerandom

  # Test 15: random merge with sync=1
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr ./tools/benchmark.sh mergerandom

  # Test 16: random read while merging 
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr WRITES_PER_SECOND=$wps \
    ./tools/benchmark.sh readwhilemerging

  # Test 17: range scan while merging 
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr WRITES_PER_SECOND=$wps \
    NUM_NEXTS_PER_SEEK=$nps ./tools/benchmark.sh fwdrangewhilemerging

  # Test 18: reverse range scan while merging 
  env $ARGS DURATION=$duration NUM_THREADS=$num_thr WRITES_PER_SECOND=$wps \
    NUM_NEXTS_PER_SEEK=$nps ./tools/benchmark.sh revrangewhilemerging
done

cat $output_dir/report.txt