Tuesday, January 22, 2019

A subtle error when initializing multiple variables on one line in Python

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From a code-style perspective, I don't often like to put multiple variable initializations on a single line, but once in a while it make...
1 comment:
Monday, September 24, 2018

A more granular view of DynamoDB throughput using CloudWatch

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DynamoDB, Amazon Web Services' NoSQL database in the cloud, provides guaranteed levels of read and write throughput, measured in units c...
1 comment:
Friday, February 16, 2018

Copying an EC2 AMI between regions with boto 2

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There are some good articles about copying an Amazon Machine Image (AMI) from one region to another, such as this one . It rightly states th...
1 comment:
Wednesday, September 13, 2017

A plumber's guide to software troubleshooting

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The other day, my downstairs neighbor knocked on my door and delivered the alarming news that water was dripping from the ceiling of his lau...
1 comment:
Friday, September 1, 2017

Using SQL date_trunc to group log records for troubleshooting

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Did you ever notice a recurring error message in your log files, only to wonder if the problem has recently become more severe, or has actua...
Tuesday, August 15, 2017

Using old commits in GitHub to troubleshoot -- and fixing a common SQL error

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By this morning, evidence was mounting that something was wrong -- very wrong. Support reps were reporting that customers' files weren...
Monday, July 3, 2017

Using CloudFront access logs to investigate unexpected traffic

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Amazon's content delivery network (CDN), CloudFront , has many benefits when serving web content to a large global audience. A small, bu...