Author Archives: Jeremy Calvey

Network Storage: Western Digital rack mounts for SMEs

Western Digital intends to provide SMEs large account distribution for storage in rack mount server format, based on Intel Atom with a maximum capacity of 16 TB, data preservation oriented with support for virtual environments.

A call for SMEs and its branch offices of large accounts that have opted for infrastructure storage type rack, Western Digital responds with a dedicated NAS server: the Sentinel RX4100.

In 1U, this model built in single-socket based on Intel ATOM (Dual core 1.8 GHz) is positioned as the DX4000 which seems a successor. 4-bay SATA 3 (6 GB/s), the maximum storage capacity is 16 TB HDD or SSD in a Windows Storage Server 2008 R2 essentials environment. read more

Best Tips For Faster Loading Web Sites

The following are key points to speed up your website load time. All these practices are based on the fact that only 10 to 20 percent of the total end user response time is being spent getting the HTML document to the browser. We need to focus on the other 80 to 90 percent. If you want your pages to get upload fast then follow these steps which are known as the best practices.

  1. Make a smaller amount of HTTP requests
  2. Use content delivery network such as MaxCDN
  3. Add an Expires Header
  4. Gzip Components
  5. Put Stylesheets at the Top
  6. Put scripts at the Bottom
  7. Try to avoid CSS Expression
  8. Make JavaScript and CSS External
  9. Reduce DNS Lookups
  10. Minify JavaScript
  11. Avoid Redirects
  12. Remote Duplicate script
  13. Configure Etags
  14. Make Ajax Cacheable

For more information you can check Steves Souders‘ blog site. There you will find a brief summary of the each rule along with comments. read more

Cloud computing principles and paradigms

Cloud-Computing

These days you will find many IT technology press releases that suggests the cloud solutions. Many solutions are indeed on this concept, including mobility, social networks, management of personal data, etc.… But still its many terms are unclear. The purpose of this article is to demystify the concept of cloud computing by explaining some of these implementations: Iaas, PaaS, SaaS.

IaaS, PaaS and SaaS

Cloud computing offers a model for on-demand access to share computing resources, configurable networks, servers, storage, applications and services which can be rapidly provisioned. The idea is to provide a flawless data processing capacity. read more

Website Content Resolution and CSS

How to adjust content to the resolution of the visitor? What resolution should I choose?

Simply apply a relative width, which changes depending on the size of the Window and the screen of the visitor page. The most common is to use the body tag. If you use a #div or body tag to adjust the size of the page, use the below CSS code:

body {width: 100%;}

With the above code you page will take 100% of the Window, regardless of its size. Obviously  you can set the width you want such as 90%, 80%, etc… If you define a smaller width, it can focus with “margin auto”. read more

Linux Plesk Server Exhausted of Free Disk Space After Trying To Download a Backup File

Applies To

  • Parallels Plesk Panel 11.x for Linux
  • Parallels Plesk Panel 10.x for Linux
  • Parallels Plesk Panel 9.x for Linux/Unix
  • Parallels Plesk Panel 8.x for Linux/Unix

Warning Sign

When you perform a system backup from the Parallels Plesk Control Panel, then after its completion you normally go to the Backup Manager and Click to download the current backup file. But sometimes file never get downloaded and you experience a slow  server performance.

Reason

The above situation occurs  most likely due to the unavailable free disk space on one of your partitions.

Explanation

If you have a small root partition:

[[email protected]/]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/isw_Volume0p2
9.5G 6.1G 3.0G 68% /
/dev/mapper/isw_Volume0p6
437G 51G 364G 13% /var read more