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start [2023/03/25 11:28] Ilias Iliopoulos [Raspberry Pi Projects] |
start [2024/02/02 21:51] (current) Ilias Iliopoulos |
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| ===== Various ===== | ===== Various ===== | ||
| - | * [[various:how-to-create-self-signed-certificates|How to create self-signed certificates]] | + | * [[various:how-to-create-self-signed-certificates|How to create self-signed certificates]] |
| ===== Raspberry Pi Projects ===== | ===== Raspberry Pi Projects ===== | ||
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| This web site is hosted on a humble, first generation **512MB Raspberry Pi Model B**. Its data reside in an SD card and a USB flash drive. This particular configuration has been chosen with the purpose of "proving" that even a minimal system can perform adequately enough, when properly designed and configured. Even with such a small system, the landing page [[https://www.fryktoria.com|www.fryktoria.com]] achieves a remarkable score of 86 to 92 with [[https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fwww.fryktoria.com%2F&tab=desktop|Google PageSpeed Insights]]. | This web site is hosted on a humble, first generation **512MB Raspberry Pi Model B**. Its data reside in an SD card and a USB flash drive. This particular configuration has been chosen with the purpose of "proving" that even a minimal system can perform adequately enough, when properly designed and configured. Even with such a small system, the landing page [[https://www.fryktoria.com|www.fryktoria.com]] achieves a remarkable score of 86 to 92 with [[https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fwww.fryktoria.com%2F&tab=desktop|Google PageSpeed Insights]]. | ||
| - | The development of the server which hosts the site was a large project by itself. Parts of this work shall be documented herein (work in progress...). It was an architectural decision to avoid installing databases such as those used in blog software due to the limited system resources, as well as the extensive wear that databases impose on the solid state drives. This wiki has been built on [[https://www.dokuwiki.org/dokuwiki|Dokuwiki]], which relies on flat files and does not require a database management system. **[UPDATE 2021.07.17] Up to now, the maximum time that the server managed to run continuously without a single restart in any of the running services has been 377 consecutive days. Although the server was still running, I detected a corruption in the SD. A full restore of the latest backup onto a new SD was required to have the system up and running again. ** **[UPDATE 2023.03.25] The SD corruption problem was identified to be caused by the files that were modified in the DHCP process. Although I had set a never-expiring IP address in my DHCP server for my Pi, the communication between the DHCP client of the Pi with the DHCP server, kept updating the local files, causing eventually the SD corruption. In spite of the fact that the management of the IP addresses of all computers in my local network would be much easier if performed centrally, it seems that a fully static IP address need to be set-up. Since the repair, the server is running for 244 continuous days without problems.** | + | The development of the server which hosts the site was a large project by itself. Parts of this work shall be documented herein (work in progress...). It was an architectural decision to avoid installing databases such as those used in blog software due to the limited system resources, as well as the extensive wear that databases impose on the solid state drives. This wiki has been built on [[https://www.dokuwiki.org/dokuwiki|Dokuwiki]], which relies on flat files and does not require a database management system. The maximum time that the server managed to run continuously without a single restart in any of the running services has been 407 consecutive days, and still going on. SD corruption occured after the first installation but corrective measures have been taken. You may find the suspected reasons for the SD corruption and the resolution [[sd_corruption_reasons|here]]. |
| The target group of this wiki is people having medium to advanced knowledge in Electrical and Electronic Engineering, as well as in Software Engineering. Mechanical skills may also be required in cases where a project needs construction activities or refurbishment. As a result, articles published on this wiki shall cover very specialized subjects and the content will serve mostly as a food-for-thought for people who wish to re-use ideas and approaches found herein, rather than being a step-by-step instructable for novices. Novices who want to extend their hobby with a deeper knowledge of the world of system design, may also benefit from the articles. | The target group of this wiki is people having medium to advanced knowledge in Electrical and Electronic Engineering, as well as in Software Engineering. Mechanical skills may also be required in cases where a project needs construction activities or refurbishment. As a result, articles published on this wiki shall cover very specialized subjects and the content will serve mostly as a food-for-thought for people who wish to re-use ideas and approaches found herein, rather than being a step-by-step instructable for novices. Novices who want to extend their hobby with a deeper knowledge of the world of system design, may also benefit from the articles. | ||
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| Anyone who wishes to contact me, can do so by filling [[https://www.fryktoria.com/wiki-contact.html|this contact form]]. I cannot commit on responding all contacts but I will try my best. | Anyone who wishes to contact me, can do so by filling [[https://www.fryktoria.com/wiki-contact.html|this contact form]]. I cannot commit on responding all contacts but I will try my best. | ||
| + | ~~DISQUS~~ | ||
start.1679736529.txt.gz ยท Last modified: 2023/03/25 11:28 by Ilias Iliopoulos