Docker is not a complete virtualization technology, but has features that, if developed; could compete in hypervisor such as VMware. When we talk about virtualization, always we include the classic examples of hypervisors such as VMware and Hyper-V and, although less frequently; technologies like Xen and KVM. In this list of virtualization technologies, almost never include Docker and the … [Read more...]
Archives for October 2014
What is GlusterFS?
GlusterFS is a distributed file system, the memory elements are presented as a single file system from a plurality of servers or nodes. The various servers even nodes, form a client-server architecture over TCP / IP. A distinctive feature from NAS systems is that, a redundant connection of storage devices over TCP / IP is possible. The data on all the cluster nodes can be read and written at the … [Read more...]
Libswarm : The Open Source Docker API
Libswarm is an Open Source Docker, a Toolkit for Composing Network Services and Supported by Rackspace Cloud. We can aggregate all containers easily. The open source library allows us to move the Docker containers directly to Rackspace Cloud Server from different hosts, avoiding the lengthy previous manual method. If you are not sure what is Docker, before reading about Libswarm, you probably … [Read more...]
Reduce Time To First Byte (TTFB) on Cloud Server
It is Possible To Reduce Time To First Byte (TTFB), regardless of the web software or cms like WordPress, Joomla, Magento etc. used to create and maintain content on Cloud Server if You Know Which Components Determines This Time To First Byte (TTFB). Previously, we have discussed about Time To First Byte (TTFB). Some more information Here. Know What Determines The Value Before Trying To … [Read more...]
Ubuntu, Run Level and Auto Starting Application
In this guide, we will discuss about Ubuntu, Run Level and Auto Starting Application with some practical example to configure app to auto start. Silence is golden, so one day's break in the flow of our publication! Basically, we are checking vulnerabilities of the virtualization software on our servers. Run Level is not much known to the casual users, it is quite important for precise control of … [Read more...]
mysqlslap Tutorial : Basics on MySQL Stress Test Tool
Here is basic mysqlslap Tutorial to perform MySQL stress test. MySQL comes with mysqlslap, a benchmarking tool which can help you to test database servers. For MySQL optimization test, we usually use Major Hayden's MySQL Tuner Script. This mysqlslap tutorial is for the beginners. One should read in the way we normally handle MySQL database from command line. mysqlslap Tutorial : First … [Read more...]
Fix Nova Agent Not Working ( Rackspace Cloud, Ubuntu )
Here Is How To Fix Nova Agent Not Working After Running Upgrade or Automated System Restart. It is nothing but again creating symlinks. Previously, we wrote about Nova-Agent and explained that Nova Agent and se-linux-distribution must run at boot for proper function. Here is Fix Nova Agent Not Working. So if two functions - automatic image backup and Rackspace Cloud monitoring tool is not working, … [Read more...]
How Much Rackspace Cost?
Frequently readers ask us how much Rackspace cost? Rackspace does not cost much with the quality of products they offer. You can save good money. We have no affiliate links to any service provider in this website. For free or lesser cost PaaS - either Heroku or Openshift. OpenShift is easy to use. Rackspace is not for junk websites, it is a premium service. Rackspace manually verifies the account … [Read more...]
Nova-Agent : How it Works on OpenStack Public Cloud
This is brief introduction to Nova-Agent, which runs as daemon on OpenStack Public Cloud like Rackspace. If it does not start, dependent services will fail. In previous article, we talked about fixing patching ShellShock Bug, but we have not said that Xen Virtualization had some bugs too, which was so sensitive, globally all including Rackspace Patched and Restarted the Servers. With one level up … [Read more...]
Shellshock Bash Vulnerability Patch (Rackspace Cloud Server)
Here is a guide to Shellshock Bash Vulnerability Patch for Infrastructure managed Rackspace Cloud. You should be careful about Nova-Agent. Rackspace obviously has official guides on their community forum plus you can always open a ticket or ask via chat to fix the issue. Rackspace, for other reasons is restarting the servers. As during upgrade, you'll need to replace the boot files (in case of … [Read more...]
Dynamic Cloud Enterprise Content Management Strategy
Companies need dynamic Cloud Enterprise Content Management strategy developed to combine collection, retention and use of the business documents. Many companies are faced with a dilemma, because the amount and variety of unstructured content is continuously increasing. The staffs create a steady flow of documents such as emails, web content, media files and transactions. Companies need to capture … [Read more...]