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[ElastiCache] How to figure out the required nodes and instance in ElastiCache

Hi, I am trying to figure out the required nodes and instance type in ElastiCache. It is because I am trying to reduce the cost of following result by replacing DynamoDB to ElastiCache. I haven't decided should it be Memcached or Redis. However, the DB can be volatile, so I am considering Memcached for upscaling from Auto Detect. The following is is the price calculation and needed data for cost calculation for your reference. Could you please guide me on how to get node number and instance type for ElastiCache? In short, it's about 0.5GB data and there are high frequency of reads and writes. It looks like one node of ElastiCache/Memcached with high tier instance type would suffice, but I would like your advice. Thank you, ---------- https://calculator.aws/#/estimate?id=7ab704749c01bf87fbd852425e35d45f7a825d5e Total: 31,195.07 USD Devices: 60000 Average message size: 5800 bytes Message per min while on: 6 Message per month while on: 1*30*24*60*6= 259200 Assume users only using IoT devices 10% of all time Message per month: 25920 Total message instances: 60000 * 25920 = 1555.2 M Assuming only 5% are different data = 77.76 M DynamoDB item size: 6K bytes (including some meta data) Total hot data size = 6KB * 60000 = 352MB Assuming 10ms for each Lambda processing. 128MB used for Lambda Cold data amount = 77.76 M * 5800 B = 451 GB Compression assumption 10% = 45.1 TB Infrequent access percent 90% Objects per month (100 instances to 1 object): .7776 M Read access of S3: 1% of write: 7.7760 K
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AWS-User-6598922
asked a year ago
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