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Servers & Storage Feed

Sun Servers and Storage, Solaris, Oracle Linux, Red Hat Linux, Oracle VM for x86, Oracle VDI and Virtualization resources, news, and support articles.

Python reverse a string with slicing

In python there is no direct function to reverse a string, to reverse a string we need to use slicing.
A slice extracts elements based on a start.
An extended slice extracts elements based on start and stop with step/stride.
Some examples of slicing:

Running Nova-Docker on OpenStack Juno (CentOS 7)

Recently Filip Krikava made a fork on github and created a Juno branch using the latest commit +Fix the problem when an image is not located in the local docker image registry ( )

Xen Project 4.5 Release Candidate 4 Test Day on December 17, 2014

Our Last Scheduled 4.5 Release Candidate Testing is on Wednesday


The Test Day for 4.5 RC4 has been set for this Wednesday, December 17, 2014.

Test Days insure that the upcoming release is ready for production. It also allows all users to test out the upcoming release in their own environment.

HOWTO update a forked Git repo

When contributing to open source projects, it’s pretty common these days to fork the project on Github, add your contribution, and then send your work as a so-called “pull request” to the project for inclusion. It’s nice, clean and fast. I did this last week to contribute to Apache CloudStack. When I wanted to contribute […]

Execute script on remote server SSH - Unix

Assume you have a complex bash script named '' (containing good number of loops, Awk statements, multiple lines of code etc) that you need to run against one or more remote servers via SSH. One way would be to copy (i.e. scp) the script to the remote server(s) and then do something like this: e.g. $ scp -2 root@$ ssh -2 root@ sh /tmp/

Xen Project Contributor Training

A few weeks ago, I went onto a road trip to China with the aim to meet Xen Project users as well as contributors. When I was planning the trip, it became apparent that many of the developers in China are new to the project and had difficulties with Xen Project governance and how the project operated. As we also have had issues with increasing code review times due to a large influx of new developers, I put together some comprehensive training package targeted at new community members.

Video: Best Practices for Application Performance, Scalability, and Availability

Nancy Ikeda nails it in a great Oracle OpenWorld recording of her Best
Practices for Application Performance, Scalability, and Availability
now viewable on the href=""
>Oracle Call Interface page

The session covered:

Python – check if value/variable is integer

By using is isinstance(var, type) function we can check a given value/variable is integer or not. isinstance will either written True or False.
Here is and an example:
>>> isinstance(10, int)
>>> var_a=10
>>> isinstance(var_a, int)
>>> isinstance('a', int)
To check if variable is a number use following example:

Device Assist

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