SPIZD stands for Stress Probing Invasive Zap Destructor; it's a command-line stress test tool used to determine how many simultaneous (concurrent) connections servers can handle. Protocols: http, pop3, pop3s, imap, imaps, smtp, smtps, ssh, radius.
A powerful,high available,flexible,enterprise-level load/stress test framework.Use it, extend it, just making your load test fruitful, your production stable. Hopefully, it's pretty much everything you seek in load test and it's beyond your expectation