Context: Add slower & higher latency HDD to an SSD only Ceph cluster. I’ve chosen to add the slow disks to the existing cluster instead of creating another dedicated cluster. But since HDD and SSD are mixed, we need some tuning in order to limit the impact on cluster performance. In the below example, I’ll …
Extend a Ceph cluster with slower HDD disks with SSD cache-tiering Read More »
With the growing bandwidth and CPU available to some users (fiber, decent DSL, ….) I see more and more web sites with insanely big pictures. Here’s a way to optimize your website experience, and especially loading time over mobile or poor internet bandwidth. Image size is the very first step to get faster and more …
RBD (RADOS Block Device) volumes can be exported using RBD Snapshots and exports. Once we use Snapshots, we can also run differential exports, so have differential backups from Ceph. When providing Proxmox with Ceph RBD, it will create a RBD volume for each VM or CT. CephFS different and are out of the scope. In …
Typically, the user-agent sent by your web browser it way too much verbose. While the user-agent was useful to restrict website features for some browsers that were not supporting recent features, this becomes a concern since a too precise user-agent can : Make it easy for web sites to track you, even without cookies if …
If you store files on AWS S3 to be referenced by your public website, you might want to prevent the link to be used by other websites or just to be shared without going first to your web page. Thus generating traffic cost on your AWS account without visiting your web page. Setting up an …