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Created January 23, 2014 16:25
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AWS ELB pre-warming questions. These questions (and sample answers) were provided by AWS support on 2013-11-26; I've edited slightly for clarity.
0. What is the name of the ELB which needs to be pre-warmed?
a. e.g. yourwebapp-yourcompany-123456789.us-east-1.elb.amazonaws.com
1. What is the approximate increase percentage in traffic, or expected requests/sec that will go through the load balancer (whichever is easier to answer)?
a. e.g. 3,500 per second
2. Do you know the average amount of data passing through the ELB per request/response pair?
a. e.g. Roughly 250KB.
3. Expected percent of traffic going through the ELB that will be using SSL termination?
a. e.g. 25% - 33%
4. Is the back-end currently scaled to the level it will be during the event?
-- If not, when do you expect to add the required back-end instance count? Also what type of instance and how many?
a. e.g. No. We will have 20 mx.2xlarge. Wednesday Nov 27th noon EST.
5. When do you expect the event will end?
a. Tuesday Dec 3 noon EST.
6. What are your normal traffic patterns?
--- Are they long-running requests?
a. e.g. No
--- Do you need connections to be open for an extended period of time?
a. e.g. No
--- Are these basic GET requests? POSTs? PUTs? Large file uploads/downloads?
a. e.g. GET & POST. Few to none file uploads/downloads
-- How frequently do you expect surges in traffic, and how quickly traffic will ramp up to peak during these surges?
a1. e.g. On November 29th we will see spikes in traffic every hour on the hour during the 24 hour period (Eastern Time). These should peak at about 15 - 45 minutes into each hour.
a2. e.g. On December 2nd we will see traffic start to ramp up at midnight. Estimated peak at 9am (Eastern). At peak the traffic should maintain persistent through December 5. Some spikes could occur during this time.
7. Are the back-end instances using persistent connections (aka: keep-alive)?
a. e.g. Yes
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