final Store<ByteArray, byte[], byte[]> store = getStore();
int numOps = 100;
final CountDownLatch latch = new CountDownLatch(numOps);
Executor exec = Executors.newCachedThreadPool();
for(int i = 0; i < numOps; i++) {
exec.execute(new Runnable() {
public void run() {
store.put(TestUtils.toByteArray(TestUtils.randomString("abcdefghijklmnopqrs",
10)),
new Versioned<byte[]>(TestUtils.randomBytes(8)),