To expand on the MQ vs. HTTP question -- what are the pros/cons of using SMTP/POP3 vs. MQ? E-Mail and MQ (Message...
By submitting your email address, you agree to receive emails regarding relevant topic offers from TechTarget and its partners. You can withdraw your consent at any time. Contact TechTarget at 275 Grove Street, Newton, MA.
Queueing) are similar in that information to be exchanged is encapsulated in self-contained messages, which carry a header, a body, and addressing information. Both systems rely on store-and-forward communications for decoupling senders and receivers of messages.
E-mail was designed mainly for human-to-human interactions. The "API" is a Mail User Agent such as Eudora, Netscape Messenger, MS Outlook, etc. E-mail is typically reliable, but cannot offer the delivery guarantees required by mission critical applications. Mission critical applications often require guaranteed delivery of messages, transactional messages, and low latency. In e-mail, messages can still be lost when a mail folder has exhausted its disk quota, when a mail server is down, or when a mail server has exhausted the available disk space. In this case, the sender will receive a "failure report", and the original message is discarded by the mail system.
Still there are situations where it makes lots of sense to let applications communicate via e-mail:
- Since the applications run at two different companies, and e-mail is the only communications protocol supported between these two companies
- Since lose-coupling is required
- Since guaranteed delivery is not required
On the other hand, MQ software (such as IBM MQSeries, TIBCO, SonicMQ, or Softwired iBus) was designed for application-to-application (as opposed to human-to-human) messaging with:
- Low latency
- High throughput
- End-to-end flow control
- And guaranteed delivery
MQ products provide an appropriate API, allowing messaging applications to be written quickly and easily.
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.