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introduction Why messaging important? Why rabbitmq? What Rabbitmq can do? What need to be remembered in rabbitmq?
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RABBITMQMESSAGING IN THE CLOUD
Thanh Tran
INTRODUCTION Why messaging important? Why rabbitmq? What Rabbitmq can do? What need to be remembered in rabbitmq?
WHY MESSAGING IMPORTANT? Scalability issue Traditional synchronous programming models
are poor at large scale Cloud computing Messaging enables scaling by decoupling
components and adding flexibility.
WHY RABBITMQ? Free, open source Easily installed and used by clients. Support many client’s languages Asynchronous message passing High performance (up to 30k mps for one
queue, 10k in my desktop), high availability and easy to scale up (cluster)
Support web-based administration
WHY RABBITMQ?
WHAT RABBITMQ CAN DO?
Producer Consumer
Decoupling
E.g. website passing orders to a credit-card charging engine
Producer Consumer
Bidirectional Decoupling
E.g. remote procedure call
Producer Consumer
Work aggregation, distribution and Decoupling
E.g. website passing orders to a credit-card charging engine
Producer Consumer
WHAT NEED TO BE REMEMBERED IN RABBITMQ?
3 key nouns: channel, exchange, queue. 3 types of exchange: direct, fanout, topic
3 TYPES OF EXCHANGE IN RABBITMQ
Direct:
X
ExchangeType=direct
rk: routing key bk: Binding key
Ark=“vodka”
“queue_1”
“queue_2”
bk=“vodka
”
bk=“beer”
Brk=“beer”
3 TYPES OF EXCHANGE IN RABBITMQ
Fanout:
X
ExchangeType=fanout
rk: routing key bk: Binding key
Ark=“vodka”
“queue_1”
“queue_2”
Ark=“vodka”
3 TYPES OF EXCHANGE IN RABBITMQ Topic: routing keys can be a pattern
* matches any 1 element # matches zero or more elements
X
ExchangeType=direct
rk: routing key bk: Binding key
Ark=“a.b.c”
“queue_1”
“queue_2”
bk=“a.*.c”
bk=“#.e”
Brk=“a.e”
DEMO Generate n random integers
Stand alone mode Distributed mode using rabbitmq
How:
master
worker_1queue_1
worker_2
worker_k
queue_2
queue_k
n random integers
n/k
n/k
n/k
Rabbitmq
Mergingqueue
Split j
ob
QUESTIONS?
