Leap Second To Be Added End Of 2008 And Its Impact On Clustered Computers / Network

Posted on in Categories Hardware, High performance computing, Linux, News, Sys admin, Tips, UNIX, Windows server last updated December 31, 2008

Get ready for a minute with 61 seconds. Scientists are delaying the start of 2009 by the first ‘leap second’ a timing tweak meant to make up for changes in the Earth’s rotation.

The aged Earth is slowing down in its daily rotation, at least in the current epoch. So a leap second is added (a one-second adjustment added) to our time. This year will be exactly one second longer.

Precise time measurements are needed for high-speed communications systems among other modern technologies such as clusters, GPS, networks. You need to make sure that you are running updated version of ntpd that support leap second for UNIX and Windows computers.

Top 10 Linux Virtualization Software

Posted on in Categories Linux, Linux desktop, Linux distribution, Linux Scalability, Linux Virtualization, Networking, RedHat/Fedora Linux, Security, Solaris, Storage, Ubuntu Linux, UNIX, vmware, Windows server, xen last updated December 6, 2009

Virtualization is the latest buzz word. You may wonder computers are getting cheaper every day, why should I care and why should I use virtualization? Virtualization is a broad term that refers to the abstraction of computer resources such as:

  1. Platform Virtualization
  2. Resource Virtualization
  3. Storage Virtualization
  4. Network Virtualization
  5. Desktop Virtualization

This article describes why you need virtualization and list commonly used FOSS and proprietary Linux virtualization software.

Download of the day: WordPress 2.7

Posted on in Categories Download of the day, GNU/Open source, Linux, Open source coding, php, UNIX, Windows server last updated December 11, 2008

Wordpress version 2.7 has been released and available for download. From the announcement page:

The first thing you’ll notice about 2.7 is its new interface. From the top down, we’ve listened to your feedback and thought deeply about the design and the result is a WordPress that’s just plain faster. Nearly every task you do on your blog will take fewer clicks and be faster in 2.7 than it did in a previous version.

What is new in Wordpress 2.7

For a visual introduction to what 2.7 is, check out this video (available in HD, and full screen):

Download the latest release of WordPress version 2.7, released on 10 December 2008.

HowTo: Authenticate Linux Clients with Microsoft Active Directory

Posted on in Categories Linux, Linux desktop, RedHat/Fedora Linux, Sys admin, Tips, Troubleshooting, Windows, Windows server last updated November 18, 2008

Every IT shop has a mix of Windows and Linux system. Sometime you need to authenticate your Linux desktop system against Microsoft Active Directory service. You can save time, effort and IT infrastructure by sharing authentication server. This article explains how to setup the Linux desktop computers with Active Directory using Samba and winbind.

RAID 5 vs RAID 10: Recommended RAID For Safety and Performance

Posted on in Categories File system, FreeBSD, Hardware, Linux, OpenBSD, RedHat/Fedora Linux, Storage, Suse Linux, UNIX, Windows server last updated December 28, 2009

A Redundant Array of Independent Drives (or Disks), also known as Redundant Array of Inexpensive Drives (or Disks) (RAID) is an term for data storage schemes that divide and/or replicate data among multiple hard drives. RAID can be designed to provide increased data reliability or increased I/O performance, though one goal may compromise the other. There are 10 RAID level. But which one is recommended for data safety and performance considering that hard drives are commodity priced?