Bash script to run db_bench with options and send data to ods.

Summary:
Basic Regression test.
Plan to run this every-night and record qps in ods.

Test Plan: ran locally and checked

Reviewers: dhruba

Reviewed By: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D7929

regression_build_test.sh

@@ -0,0 +1,31 @@
+#!/bin/bash -e
+make clean
+make db_bench -j12
+
+function send_to_ods {
+  key="$1"
+  value="$2"
+  curl -s "https://www.intern.facebook.com/intern/agent/ods_set.php?entity=rocksdb_build&key=$key&value=$value"
+}
+
+NUM=100000000
+
+DATA_DIR="$1"
+if [ -z "$DATA_DIR" ]
+then
+  DATA_DIR="/data/users/abhishekk/test_ldb"
+fi
+STAT_FILE="/tmp/leveldb_test_stats"
+
+./db_bench --benchmarks=fillseq --db="$DATA_DIR" --use_existing_db=0 --bloom_bits=10 --num=$NUM --writes=$NUM --cache_size=6442450944 --cache_numshardbits=6 --open_files=55000 --statistics=1 --histogram=1 --disable_data_sync=1 --disable_wal=1 --sync=0  > "$STAT_FILE.fillseq"
+
+./db_bench --benchmarks=overwrite --db=$DATA_DIR --use_existing_db=1 --bloom_bits=10 --num=$NUM --writes=$((NUM / 2)) --cache_size=6442450944 --cache_numshardbits=6  --open_files=55000 --statistics=1 --histogram=1 --disable_data_sync=1 --disable_wal=1 --sync=0 --threads=8 > "$STAT_FILE.overwrite"
+
+./db_bench --benchmarks=readrandom --db=$DATA_DIR --use_existing_db=1 --bloom_bits=10 --num=$NUM --reads=$((NUM / 100)) --cache_size=6442450944 --cache_numshardbits=6 --open_files=55000 --statistics=1 --histogram=1 --disable_data_sync=1 --disable_wal=1 --sync=0 --threads=128 > "$STAT_FILE.readrandom"
+
+OVERWRITE_OPS=$(grep overwrite "$STAT_FILE.overwrite" |cut -d"/" -f2 |cut -d" " -f2)
+FILLSEQ_OPS=$(grep fillseq a.out |cut -d"/" -f2 |cut -d" " -f2)
+READRANDOM_OPS=$(grep readrandom a.out |cut -d"/" -f2 |cut -d" " -f2)
+send_to_ods rocksdb.build.overwrite.qps $OVERWRITE_OPS
+send_to_ods rocksdb.build.fillseq.qps $FILLSEQ_OPS
+send_to_ods rocksdb.build.readrandom.qps $READRANDOM_OPS