2012年11月28日 星期三

Cloud, Big Data and Mobile: Dissecting Amazon ELB : 18 things you should know

Cloud, Big Data and Mobile: Dissecting Amazon ELB : 18 things you should know:

Algorithms supported by Amazon ELB
Amazon ELB is not a PAGE CACHE
Amazon ELB can be pre warmed on request basis
Amazon ELB is not designed for sudden load spikes /Flash traffic
Protocols supported by Amazon ELB (http, https, SSL, TCP/ 25,80,443, 1024-65535)
Amazon ELB timeouts at 60 seconds (kept idle)
Amazon ELB does not provide Permanent or Fixed IP for its load Balancers
Amazon ELB cannot do Multi AWS Region Load Balancing
Amazon ELB sticks request when traffic is generated from Single IP
Too long Load Balancer CNAMES causes issues in some firewalls /ISP
Amazon ELB cannot Load Balance based on URL patterns
Amazon ELB can easily support more than 20K+ Concurrent reqs/sec
Amazon ELB does not provide logs
Amazon ELB + Amazon AutoScaling : No graceful connection termination

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