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结论：Pipeline + Transaction方式是几种插入方式中性能最好的。虽然有点意外，但测试多次仍然是这个结论。

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测试代码如下：

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import org.apache.commons.lang.RandomStringUtils;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.Pipeline;
import redis.clients.jedis.Transaction;

public class RedisTransactionTest {

	private static String host = "xx.xx.xx.xx";

	private static JedisPool pool = new JedisPool(new JedisPoolConfig(), host);

	private long rowCount = 1000000; // 100万

	public static void main(String[] args) {
		long start = System.currentTimeMillis();
		new RedisTransactionTest().noTransactionNoPipeline();
		System.out.println("noTransactionNoPipeline use " + (System.currentTimeMillis() - start) / 1000);

		pool = new JedisPool(new JedisPoolConfig(), host);
		start = System.currentTimeMillis();
		new RedisTransactionTest().pipelineWithoutTransaction();
		System.out.println("pipelineWithoutTransaction use " + (System.currentTimeMillis() - start) / 1000);

		pool = new JedisPool(new JedisPoolConfig(), host);
		start = System.currentTimeMillis();
		new RedisTransactionTest().pipelineWithTransaction();
		System.out.println("pipelineWithTransaction use " + (System.currentTimeMillis() - start) / 1000);

		pool = new JedisPool(new JedisPoolConfig(), host);
		start = System.currentTimeMillis();
		new RedisTransactionTest().transactionNoPipeline();
		System.out.println("transactionNoPipeline use " + (System.currentTimeMillis() - start) / 1000);

	}

	public void pipelineWithoutTransaction() {
		Jedis jedis = pool.getResource();
		try {
			Pipeline p = jedis.pipelined();
			for (int i = 0; i < rowCount; i++) {
				String key = RandomStringUtils.randomAlphabetic(8);
				p.set(key, RandomStringUtils.randomNumeric(5));
				p.expire(key, 5 * 60);
			}
			p.sync();
		} catch (Exception e) {
			pool.returnResource(jedis);
		}
	}

	public void pipelineWithTransaction() {
		Jedis jedis = pool.getResource();
		try {
			Pipeline p = jedis.pipelined();
			p.multi();
			for (int i = 0; i < rowCount; i++) {
				String key = RandomStringUtils.randomAlphabetic(8);
				p.set(key, RandomStringUtils.randomNumeric(5));
				p.expire(key, 5 * 60);
			}
			p.exec();
			p.sync();
		} catch (Exception e) {
			pool.returnResource(jedis);
		}
	}

	public void noTransactionNoPipeline() {
		Jedis jedis = pool.getResource();
		try {
			for (int i = 0; i < rowCount; i++) {
				String key = RandomStringUtils.randomAlphabetic(8);
				jedis.set(key, RandomStringUtils.randomNumeric(5));
				jedis.expire(key, 5 * 60);
			}
		} catch (Exception e) {
			pool.returnResource(jedis);
		}
	}

	public void transactionNoPipeline() {
		Jedis jedis = pool.getResource();
		try {
			Transaction tx = jedis.multi();
			for (int i = 0; i < rowCount; i++) {
				String key = RandomStringUtils.randomAlphabetic(8);
				tx.set(key, RandomStringUtils.randomNumeric(5));
				tx.expire(key, 5 * 60);
			}
			tx.exec();
		} catch (Exception e) {
			pool.returnResource(jedis);
		}
	}
}

?--end

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