mdbx-test: add 'gc.sh' script.

Change-Id: I633c93c0865b0d2609688713e986edf51ce6547d

test/gc.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+set -euo pipefail
+TESTDB_PREFIX=${1:-/dev/shm/mdbx-gc-test}
+
+function rep9 { printf "%*s" $1 '' | tr ' ' '9'; }
+function join { local IFS="$1"; shift; echo "$*"; }
+function bit2option { local -n arr=$1; (( ($2&(1<<$3)) != 0 )) && echo -n '+' || echo -n '-'; echo "${arr[$3]}"; }
+
+options=(writemap coalesce lifo)
+
+function bits2list {
+	local -n arr=$1
+	local i
+	local list=()
+	for ((i=0; i<${#arr[@]}; ++i)) do
+		list[$i]=$(bit2option $1 $2 $i)
+	done
+	join , "${list[@]}"
+}
+
+for nops in {1..7}; do
+	for ((wbatch=nops; wbatch > 0; --wbatch)); do
+		for ((bits=2**${#options[@]}; --bits >= 0; )); do
+			echo "=================================== $(date)"
+			rm -f ${TESTDB_PREFIX}*
+			echo --nops=$( rep9 $nops ) --batch.write=$( rep9 $wbatch ) --mode=$(bits2list options $bits)
+			./mdbx_test --pathname=${TESTDB_PREFIX} --size=8G --keylen.min=1 --keylen.max=250 --datalen.min=1 --datalen.max=500 \
+				--nops=$( rep9 $nops ) --batch.write=$( rep9 $wbatch ) --mode=$(bits2list options $bits) \
+				--hill | bzip2 -c > ${TESTDB_PREFIX}.log.bz2
+			./mdbx_chk -nvv ${TESTDB_PREFIX} | tee ${TESTDB_PREFIX}-chk.log
+		done
+	done
+done
+
+echo "=== ALL DONE ====================== $(date)"