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Craig Watcham
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Just another citizen of the planet
Just another citizen of the planet

86 followers
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Finding S3 API requests from previous versions of the AWS CLI and SDKs
Introduction Earlier this year the S3 team announced that S3 will stop accepting API requests signed using AWS Signature Version 2 after June 24th, 2019. Customers will need to
update their SDKs, CLIs, and custom implementations to make use of AWS
Signature...
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AWS S3 event aggregation with Lambda and DynamoDB
Introduction S3 has had event notifications since 2014 and for individual object notifications  these events work well with Lambda, allowing you to perform an action on every object event in a bucket. It is harder to use this approach when you want to perfo...
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Working with 20+ node ElastiCache Memcached clusters
ElastiCache Memcached limits the number of nodes in a cluster to 20 by default. This limit can be increased  with ElastiCache recommending against clusters larger than 50 nodes. The increased cluster node limits don't reflect in the console so even after th...
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Extracting S3 bucket sizes using the AWS CLI
A quick one liner for printing out the size (in bytes) of S3 StandardStorage buckets in your account (using bash): for name in $(aws s3api list-buckets --query 'Buckets[*].Name' --output text); do size=$(aws cloudwatch get-metric-statistics --namespace AWS/...
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Understanding EC2 "Up to 10 Gigabit" network performance for R4 instances
This post investigates the network performance of AWS R4 instances with a focus on the "Up to 10 Gigabit" networking expected from smaller (r4.large - r4.4xlarge) instance types. Before starting it should be noted that this post is based on observation and ...
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