Tag: Enterprise Infrastructure

fsfreeze in Linux

The fsfreeze command, is used to suspend and resume access to a file system. This allows consistent snapshots to be taken of the filesystem. fsfreeze supports Ext3/4, ReiserFS, JFS and XFS. A filesystem can be frozen using following command: #…

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Using strace to debug application errors in linux

strace is a very useful tool which traces system calls and signals for a running process. This helps a lot while debugging application level performance issues and bugs. Aim of this post is to demonstrate the power of strace in…

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Troubleshooting a Multipath Issue

Multipathing allows to configure multiple paths from servers to storage arrays. It provides I/O failover and load balancing. Linux uses device mapper kernel framework to support multipathing. In this post I will explain the steps taken to troubleshoot a multipath…

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Deploying a Private Cloud at Home — Part 7

Welcome to part 7, the final blog post in my series, Deploying Private Cloud at Home, where I will be sharing the scripts to configure controller and computer nodes. In my previous post, part six, I demonstrated how to configure the controller and compute…

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Deploying a Private Cloud at Home — Part 6

Today’s blog post is part six of seven in a series dedicated to Deploying a Private Cloud at Home, where I will be demonstrating how to configure controller node with legacy networking ad OpenStack dashboard for webgui. Feel free to check out…

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Deploying a Private Cloud at Home — Part 5

Today’s blog post is part five of seven in a series dedicated to Deploying Private Cloud at Home, where I will be demonstrating how to configure Compute node and OpenStack services on the compute node. We have already installed the MySQL Python…

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Service Reliability: How Systems Administration is Evolving – Part Two

In part one of this mini-series, I wrote about how the old ways of systems administration is broken and shared a story from my personal experiences. Today I’ll be talking about how it’s evolved with Site Reliability Engineering (also known…

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Service Reliability: How Systems Administration is Evolving – Part One

The world of systems administration is changing, and it’s affecting everyone involved. Today’s blog post is the first of two in mini-series dedicated to Service Reliability: How Systems Administration is Evolving. The days of formulas that tell us, You need…

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Internet Scale Design: Part Two

In my previous blog post, I emphasized that internet scale design can be implemented for any type of company. Whether it’s a small, bootstrapped startup or a rapidly growing, well-funded tier 2. But if it’s suitable for that many companies,…

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Internet Scale Design: Part One

Internet Scale graphic 1

Whether your company is a small, bootstrapped startup or a rapidly growing, well-funded tier 2 or 3 business, everyone dreams of having ‘Internet scale’ systems which are highly automated, anti-fragile, self-healing, and inexpensive to maintain. The problem, however, is that…

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