Benchmark to extract keys and value from level db, and read them again from the new database

leveldb-benchmark.sh

#!/bin/bash

# Create smaller DB from big DB
sudo lev ~/caliper-scripts/generated/production/ledgersData/chains/index --all --limit 1000000 > ~/benchdb.export
sudo lev ~/benchdb --batch ~/benchdb.export

# Bench querying the big DB
{ time { sudo lev ~/caliper-scripts/generated/production/ledgersData/chains/index --keys > /dev/null; } } 2> ~/bigQuery.txt

# Bench querying the small DB
{ time { sudo lev ~/benchdb --keys > /dev/null; } } 2> ~/smallQuery.txt