Archive for the ‘Daybook’ Category

Xen: I am a para-virtualized one!

Thursday, September 6th, 2007

The party over and my virtual machine is ready for topping with SAP.

One point: I have done a kernel upgrade from 2.6.18-8 to 2.6.18-8.1.8 at the guest OS level; in fact the dom0 machine too.

Heck with, I wanna know what would happen if I use the normal kernel on my PV/guest_OS and I change the default kernel-2.6.18-8.1.8.el5xen to kernel-2.6.18-8.1.8.el5 :)

[fubar@blxvirtual ~]# xm reboot cenos5v

screwed! [Didn’t came up]

Later I have resolved the issue. All I have done

mount my image

[foobar@blxvirtual sagar]# lomount -diskimage /var/lib/xen/images/cenos5v.img -partition 1 /vipin

[foobar@blxvirtual sagar]# cd /vipin/grub/grub.conf

change default 1 to 0 :)

Happy Xenning around !!!

Xen, Let’s do it

Sunday, September 2nd, 2007

Its been another work-around and Xen is the opted card I chose to play.

Making a virtualized environment on CentOS-5 [final] linux distro and SAP on top of both.

Happy Xenning around!!!

Let There be Light and Freedom

Tuesday, August 14th, 2007

I was interested to make some points which I mentioned below at work-place, and I was not satisfied with the way it went

and I named : Let There be Light and Freedom

“First they ignore you, then they laugh at you, then they fight you, then you win.”
-M K Gandhi

I am not here for any Anti-Microsoft-ism or a flame war, but the happenings and the hot keywords buzzing around, Linux, Open Source, Virtualization and Total Cost of Ownership [TCO].

    Linux: The Choice of Freedom

Today Linux is being used everywhere. Linux has proved it’s suitability for every workload–even the largest, most business-mission critical applications. Its security, performance and economic benefits can be applied to every level in the IT infrastructure. On the other hand Open source is powerful and it’s un-stoppable. The major Linux vendors like Red Hat and Novell/SUSE Linux are built on the open standards.

Of course, Linux dominates. The quality of Open Source software is well established. The Figure 1 shows the ranking of most available servers on the Internet.

    OpenSource Rules: Open Source is powerful. Open Source is unstoppable

According to “Wiki” the online encyclopedia, Open source is a set of principles and practices that promote access to the design and production of goods and knowledge. The term is most commonly applied to the source code of software that is available to the general public with relaxed or non-existent intellectual property restrictions. This allows users to create software content through incremental individual effort or through collaboration.

Another important point to note that Open Source software differs significantly from “freeware”. Freeware is software distributed without a fee, but without source code access but Open Source software allows anyone to inspect, identifies, and resolve flaws in the code.

The Open Source model doesn’t hide its code like Microsoft which claims that secret code is more secure. Although that seems reasonable at first glance, in reality it is patently false. When I heard this statement for the first time, I took a little while for a conclusion. Hundreds of thousands of Open Source developers, testers, bug-fixers and maintainers work as a community around the globe to make sure the flexibility, innovation, reliability, faster development of the project they working on. Sourceforge.net, a leading website for Open Source software, hosts over 130,000 projects and has 1.4 million registered users. This power exceeds that of even the mightiest proprietary software company. What would be your conclusion, by seeing the Figure 2 – Open Source movement.

    Virtualization: Many to One

Virtualization is a technology with wide range of options to improve the usage of the hardware resources and greater potentials to reduce the Total Cost of Ownership [TCO]. All most all Linux distribution now bundled with virtualization capabilities and Microsoft may have it’s built in server virtualization technology with the upcoming Windows Server-2008. Now in the market with their Microsoft Virtual Server 2005 R2

Why do we require virtualization technique and how does it reduce the cost.
Think about a business model which requires to develop and test its business applications on different platforms, which in turn required different hardware, its administration, space requirement at datacenter or inside a server rack. How do you feel if all these platform and test environment in one hardware with same performance? I think this simplifies and accelerate the productivity with low power usage. That is what virtualization does.

The most common virtualization technologies are:
0. Operating System Virtualization
1. Server Virtualization
2. Desktop Virtualization
3. Application Virtualization
4. Storage Virtualization

The major players of virtual machines are XEN, KVM and VMware with their own pros and cons.

Redhat and SUSE Linux run their Para-virtualization technology on Xen, an open source virtual machine system.

    TCO: Total Cost of Ownership

The decision makers and the IT managers of an organization consider the fact and myth about TCO, when they venture into any kind of technology deployment. This is critical and important because it’s a long term deal with the technology. Hope you might have seen the Microsoft Ad campaign/survey over the internet named “Get the Fact” Microsoft Vs Linux over TCO.

If you have already seen or ever get a chance to read about Get the Fact whitepapers in future, would you consider the following “facts”

The study NOT talk about Client Access License [CAL], the key section of a product’s licensing cost. Linux doesn’t charge you a license fee for every user accessing the server like Microsoft does.

Redhat Linux says, their subscriptions are not tied to a machine. When the hardware requirements change, Redhat subscription can be transferred to a replacement or a new machine for no additional cost. For one annual subscription, the customer gets access to the technology, documentation, updates, upgrades and un-limited technical support.

According to Novell’s Suse Linux, the figures are based on a subscription fee of $50 for Suse Linux Enterprise Desktop [SLED], compared to $299 for a Windows Vista license, as well as additional maintenance fees of $86 for Vista Business. SLED costs $50 for one year and $125 for three years, compared to Vista’s $385 for one year and $557 for three years. Add in the fact that Novell’s SLED contains a version of the OpenOffice.org, an OpenSource office productivity suite while Microsoft Office costs an additional $400 to $500.

When the Robert Frances Group study, titled “TCO For Application Servers: Comparing Linux With Windows And Solaris” and commissioned by IBM, compared the cost of acquiring, implementing, and running an application server on Linux, Windows, and Sun Solaris, it found that Linux is 40% less expensive than a comparable x86-based Windows server and 54% less than a comparable Sparc-based Solaris server. The Linux server’s costs were $40,149, compared with $67,559 for Windows and $86,478 for Solaris.
Never follow the summary or wacky ads of a survey. Make sure you have got the information that how the authors collected and analyze the data on what basis. Does that really mean to your organization and technology. And finally who sponsored the survey, was it biased.

Conclusion:

Where do we see the world of OpenSource and Linux stand by today? If you still feel the darkness around you, all I have to say: Let there be light and freedom.

Reference:

0. Official Redhat linux website http://www.redhat.com/rhel/resource_center/
1. Novell Suse linux website http://www.novell.com/linux
2. Frances Group study, titled “TCO For Application Servers: Comparing Linux With Windows And Solaris” and commissioned by IBM.
3. Online encyclopedia, Wiki. http://en.wikipedia.org/wiki/Portal:Free_software
4. Succeeding with Open Source by Bernard Golden
5. The Practical Manager’s Guide to Open Source by Maria Winslow

Kernel Update List

Sunday, July 8th, 2007

There were times I need to get the update of latest stable version of the Linux kernel, pre-patch, snapshots of 2.6.x.x 2.4.x and with a single click; you are watching :)

Kernel update list:

I am still a linux boy and SAP on top of it now!

SAP admits to ‘inappropriate downloads’ in Oracle case

Friday, July 6th, 2007

Responding to a lawsuit filed by Oracle earlier this year, SAP admitted on Tuesday that its TomorrowNow division in the U.S. made some “inappropriate downloads” from an Oracle Web site but said SAP never had access to the material.
Even a single inappropriate download is unacceptable from my perspective,” Kagermann said in a statement: “We regret very much that this occurred.

The company launched a Web site where it will publish information related to the case, including court filings and a time line of events.

Ahmedabad_00

Sunday, June 17th, 2007

Just another day to have many wishes and blessings.

May be the day make me to jot these text after a long time and I am traveling.

I am on my way to Ahmedabad, another assignment.

Well..well…well, I’m doing well and g00d. How ya are doin ?

Delhi_Goodbye

Friday, May 4th, 2007

I got a chance to thank my colleagues and the people worked with me at client’s place, and I wrote for them all.

Dear All,

Everyday has got its own freshness, a lot to remember and forget.
Today is my last day with you in “client”; I am released and got to go.

With your permission, I write down this texting to thank you all.

Thanks a bunch for “ALL” of your support, co-operation, understanding and for the g00d time.
I had a great Team. Yes I did !

I can’t resist telling this at least, I really enjoyed my late night and the wee hours of this project.
A lot to remember!!!

Thank you all once again and wishing you Good Luck.

I don’t wanna say keep in touch, keep in sight… I should say; at least try!!!

Pretty please, with sugar on top; try.

Mob : +91-xxxxxxxxxx
e-mail: name@company.com vipinATvipinsagarDOTnet

Adios

~sagar

=======================================================================

: Whose motorcycle is this?
| It's a chopper.
: Whose chopper is this?
| Zed's.
: Who's Zed?
| Zed's dead, baby, Zed's dead.

Delhi_01

Monday, February 19th, 2007

The work started at the moment I got introduced to the Team. SAP Exchange Infrastructure [XI]; now (well)known as Process Integration [PI] was the module I need to take care for the three system landscape implementation.

Hooray!!! the entire landscape is gonna happen on RedHat Linux AS. Let the g00d time r0lls!!!

Delhi_00

Sunday, February 18th, 2007

Woof…! I am lucky that I put on an extra woolen kind of brown T-Shirt, which I got from my brother.

It’s really chilling at the Airport and I walked towards the pre-paid taxi stall. Shown up my forefinger “Eak, single aadmi… mein….….taxi chahiye; Maruthi Udyog Vihar, Gurgaon”

Smiles exchanged, paid the bill and I move out of the airport premises. It was five minutes past 1 AM when I search for a telephone booth outside but it was locked.

My mobile was dead in both SIGNAL and battery charge.

What’s next…? I need to make some calls, and a call to my counterpart at Gurgaon office. The next best option was to ask for a favor from the young man who was sitting inside the Airtel shop, [New] connection/service provider.

Hi, this is Sagar…new to Delhi……hmmm… can I borrow your Nokia mobile charger for a while, if ya keep one.

:> ahha ..Yes no problem.

I kept my mobile charged and walked out of the shop, saying “I shall get some coffee for you”

:> No Sir… that is ok…. You can come and sit here.

I sat with him and we had some general conversation over the hot Nescafé. In the middle I found the first person/friend I met in Delhi was a mallu [Keralite, who speaks my mother-tongue]

Spent around half-an-hour with him, exchange numbers, he made some arrangements for the taxi; remind me to ask/call for any help needed…. Thank you so much and goodbye my friend!

Tail: He doesn’t have any balance to make a single call from his mobile. No problem I adjusted with the Taxi driver :)

Broke up with B’lore

Wednesday, February 14th, 2007

I don’t have any valentine’s story… (hmmm…do I…? ) may be I am not blessed by The Cupid.

For me today is the day to pack-up my stuffs, have a short break over Bangalore…. I am flying to Delhi on a project at our client location by hoping fun since it’s an assignment on PI Implementation, first time flying to Delhi.

Hey… B’lore I will be back, let me have some chill-out at Delhi.