Book Review – The Singapore Permanent Portfolio (1)


    July 22nd, 2015 | Tags: , , | Posted in Life, Reviews

    I was having a bad toothache (plus severe headache) from a cracked molar over the long weekend and had to visit the dentist on Monday to fix it. Don’t know whether is it a good thing or not but I ended up with the chance to read “The Singapore Permanent Portfolio” by Alvin Chow while waiting in between dental appointments.

    The Singapore Permanent Portfolio by Alvin Chow

    The Singapore Permanent Portfolio by Alvin Chow

    The idea or methodology of Permanent Portfolio is not new. What I liked about this book is the ease of reading and its contextualised contents.

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    Arduino Dust Sensor with ESP8266 (0)


    June 14th, 2015 | Tags: , , , , | Posted in Guides, Life, Tech

    Comparing the size of ESP8266 with a SD Card

    Comparing the size of ESP8266 with a SD Card

    The ESP8266 comes in various packages (e.g. ESP-12, ESP-07) but I bought the (pretty) bare package for less than US$2.50. For this price, the ESP8266 (ESP-01) has got 80 MHz CPU, 512KB program storage space, WiFi and 2 GPIOs. This tiny Arduino board is very suitable for Internet-of-Things (IoT) implementations.

    With this, I decided to rebuild my previous Arduino-based Dust Sensor. The codes for the ESP8266 is as follow.

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    Arduino Dust Sensor (1)


    May 16th, 2015 | Tags: , , , , , | Posted in Guides, Life, Tech

    Put together a dust sensor using Arduino Mega 2560, Shinyei PPD42NS dust sensor and LCD shield.

    Put together a dust sensor using Arduino Mega 2560, Shinyei PPD42NS dust sensor and LCD shield.

    Put together a Arduino-based dust sensor over the weekend using the following components:

    The codes and wiring instructions for Arduino Mega 2560 and Shinyei PPD42NS is as follow. However, I did include Serial output so you can view the sampling results using Arduino IDE’s Serial Monitor (9600 bauds).

     

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    Docker – A highly Portable and Lightweight software container (0)


    May 9th, 2015 | Tags: , , , , | Posted in Tech

    Docker, a lightweight Software Container Virtualization

    Docker, a lightweight Software Container Virtualization

    Coming from a background that dabbles with application, desktop and server virtualization technologies (e.g. Citrix XenApp/ XenDesktop, XenServer, VMware ESXi), the Docker technology seems new and yet familiar at the same time.

    Docker is somewhat similar to Java Virtual Machine (JVM) whereby it supports application stack portability across platforms (Linux, Mac, Windows, etc.). The difference is that you are not restricted a particular programming language (like Java in the case of JVM).

    You can basically package (any) applications or platforms (e.g. WordPress, Node.js, Git Server) or disk images (e.g OSes like Ubuntu, Centos, Fedora) and run it on the Docker Engine. Best of all, Docker Engine runs on Linux, Mac, Windows, Amazon EC2, Google Cloud Platform, Microsoft Azure, Synology, and the list goes on and on. Basically, you get Application Stack Portability.

     

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    Synology DiskStation DS1515+ Review – A look at DSM 5.2 (0)


    May 4th, 2015 | Tags: , , , , , , | Posted in Guides, Reviews, Tech

    An overview of containers running on Docker Engine.

    An overview of containers running on Docker Engine.

     

    I bit the bullet and upgraded to DiskStation Manager 5.2 (DSM 5.2) beta for Docker. Docker aside, Synology also introduced the following in this new release:

    Additional features in DSM 5.2
    Docker Lightweight software containerization solution that allows you to create, deploy and run applications on Synology NAS.
    Single Sign-on Register multiple DSM and access them using one set of credentials.
    Note Station Your own cloud note taking solution now features Synology Web Clipper that captures any webpage directly in a Chrome window.
    Cloud Station & Cloud Sync Cloud Station supports smart polling and customizable file versioning for each shared folder.
    Cloud Sync now offers one-way synchronization.
    Backup & Replication The file browser feature allows you to locate and selectively restore specific files. Not only that, new rotation setting makes backup versioning more space efficient.
    DS Photo+ It now supports casting to big screens through Chromecast and DLNA-compatible devices.
    File Station It can now browse and download remote data stored in different storage solutions (FTP server, public cloud, etc.).
    Link Aggregation It now supports Active-standby, 802.11ad dynamic, Balanced XOR, and Adaptive Load Balancing.
    SSD Cache The memory usage has been optimized. It now requires lesser amount for RAM for higher capacity SSD

     

    Among the list of new features, I feel particularly excited about Docker and the new Link Aggregation modes. Let me cover more on Docker as it is an exciting new technology.

     

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    Synology DiskStation DS1515+ Review – Adding new Hard Drive to Expand Storage Capacity (0)


    May 3rd, 2015 | Tags: , , , , , | Posted in Guides, Reviews, Tech

    The volume expansion process completed after almost 2 days. Storage capacity grew from 8.05TB to 10.73TB.

    The volume expansion process completed after almost 2 days. Storage capacity grew from 8.05TB to 10.73TB.

     

    There is an empty drive bay in my Synology DS1515+ and there are three choices:

    1. Leave it empty
    2. Populate it with an identical hard drive as hot spare
    3. Populate it with an identical hard drive and expand the storage capacity

    No prize for guessing which one I chose as it is pretty obvious.

     

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