optimization for thrift lib
seq start from 1
use buffered transport by default

comparison buffered vs unbuffed via tcpdump:
1 concurrent client, 2 calls of ping:
buffered:    17 packets
unbuffered: 109 packets
fix bug of wrong report counters
sample rate configurable
stats wording
mc key cannot contain space
miss err is correct
show usage
kvdb both set and get
kvdb count
ajust kvdb key/value size
optimize kvdb options

use buffer and cache, with compression
RocksDB
appErr reporting
echo to stdout
IDL for mysql servant
config for mysql
pools and dsn instead of uri
mysql servant skeleton