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InfluxDB is designed to enable fast reading and writing of data, at the expense of not allowing for updating.

If you only need to change or add field values and not the measurement name or tags then you can overwrite existing data by ensuring the same timestamp, tags, and tag values are used (You can think of the combination of the timestamp and tags forming a primary key or unique row).

If you need to change the measurement name or change tags in any way, then it’s quite an involved process that requires some thought to avoid making mistakes.

I know it’s been a while, but I’ve updated backend code and made some general improvements. I also plan on writing some articles on Telegraf, InfluxDB v2 and Grafana.

Over the past year I’ve had the opportunity to use Telegraf, InfluxDB, and Grafana as part of my day job. During this time I’ve stumbled into many problems which I’ve had to work out solutions to, so I thought I would share them since real world examples using InfluxDB, expecially version 2 and Flux, are few and far between.

There are plenty of tutorials and answers on StackOverflow regarding how to centre the contents of a UIView when the keyboard is partially obscuring it, however I couldn’t find any that take into consideration views with are not fullscreen - such as iPad form sheets.

Let’s Encrypt is a free, automated, and open certificate authority (CA), run for the public’s benefit. The service is provided by the Internet Security Research Group (ISRG).

I use Linux every day, and have done so for over a decade, but for nearly all of that time I’ve only used the command line (vis SSH).

I find Hot Corners an essential MacOS feature, especially when using apps in full-screen mode or screen sharing.  One downside of the feature is that it’s easy to accidentally activate. A way to prevent this, which isn’t at all obvious, is to require a modifier key as well as moving your mouse into the corner.

Recently I had to SSH from Mac OS X on my MacBook Pro running Yosemite (I also confirmed the same behaviour on Mavericks) to a host running Oracle Enterprise Linux 5.7. The ssh command would simply freeze, then time out with the following error a short while later.

Or more specifically – Never put a CNAME record on your Root Domain if you have other DNS records set-up (or might add them in the future).