JMeter is a load testing tool for a variety of network services. It supports features such as parameterization, assertions, cookies, and additional functionality through plug-ins.
We use Zendesk to help manage internal support requests that the IT operations team handles internally. Zendesk provides multiple methods (or channels) to submit requests, such as e-mail and the Zendesk Guide (Help Center). However, most internal communication with the IT operations team now occurs via Slack. In order to make submitting requests easier, I […]
One of the most consistently under-recognized operations in preparing to launch a new web application, particularly if migrating from an old one, is managing DNS (domain name system) concerns.
After launching a new Node.js app we built as part of a recent redesign for a high-volume site, we found some performance problems occurring every five minutes:
Sometimes, we work with APIs that require whitelisting of origin IP addresses for access. This can prove challenging when applications run on SaaS platforms hosted in the public Cloud—you cannot be guaranteed that your application will make requests from a consistent IP address (or range of IP addresses). For example, hosting on Heroku means that […]
Access logs from AWS CloudFront distributions and AWS Elastic Load Balancers can be essential to diagnosing problems with an AWS infrastructure. AWS provides the ability to store these logs in AWS S3 buckets. However, the log files are often in very many small files which need to be combined in order to get a full […]
Applications that work with files on disk can encounter incomplete or corrupted files if a target file is actively being written to disk by another process. Typically, this happens when two different systems or processes are interacting with the same file independently.
I spend a lot of time on the command line (generally, GNU/Linux), and often work on automating processes and tasks. My work often occurs on a remote machine to which I do not have access, and it generally must be headless (no GUI). As a result, I have collected an arsenal of command-line interface (CLI) […]
I have recently started relying more on AWS Elastic Container Service (ECS) to deploy applications. To assist with the process of building Docker images, pushing the images up to an AWS Elatic Container Repository (ECR), updating an existing task definition to make use of the new image, and updating an ECS cluster service to use […]
In application hosting scenarios, it is common to have data that must be available to all application instances. Often, this data is stored in a database (e.g. AWS RDS), or some other centralized repository (e.g. AWS S3). However, situations arise where third-party software expects data to be on the filesystem, or where application instances generate […]