We already made a few blogs on Cassandra and Kairos DB. Unfortunately, the recipes used to build the cluster via docker-compose are no longer working with new versions of docker. You will find below a working docker-compose using version 3 of the docker-compose system that builds a three nodes Cassandra cluster.
Using python in amazon web service lambdas can be tricky in the following scenarios.
- There are some dependencies that are not included in the aws python lambda executor
- There are some dependencies that require binaries (Packages such as numpy, sklearn e.t.c.)
For the first topic it is still possible to develop on your laptop and to send the lambda via s3. For dependencies with binaries you have to work with a real ec2.
Personal VPNs can be really useful in the following scenarios:
- You want to secure your connection because you are using a free internet hotspot.
- You want to access forbidden sites such as google from countries that block it.
- You want to use a service that is not available in your country and that has an IP geo location filter
Elastic search released the latest version of its stack. There are of course a lot of cool new things, but we also feel that they, one step after the other push people to a licence model. I have no problem with that but it makes the life of people that want to keep a licence free stack more difficult.
Node red is a really nice framework that lets you build IoTs workflows. It is in fact far more interesting than that because you can use it in order to create small workflow integrations as you would do with a product like Mule or Camel. Of course you should not use it if you want to handle critical financial messages using a MQ Series transaction but it can handle most of the less critical cases.