How To Set Up A New Virtual Data Optimizer Device Using Cockpit Web Admin Console

In Red Hat Enterprise Linux 7.5, we’ve introduced virtual data optimizer (VDO). VDO allows you to save disk space and reduce replication bandwidth with the help of data compression and data deduplication.

In this blog post I want to walk you through how you can use the cockpit Web admin console that comes with Red Hat Enterprise Linux, to set up VDO and save substantial amount of space for your virtual machine images.

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Introducing Virtual Data Optimizer to Reduce Cloud and On-premise Storage Costs

New to Red Hat Enterprise Linux 7.5, Virtual Data Optimizer (VDO) is a device mapper module which adds data reduction capabilities to the Linux block storage stack. VDO uses inline compression and data deduplication techniques to transparently shrink data as it is being written to storage media.

VDO combines three techniques — zero-block elimination, data deduplication, and data compression — to reduce data footprint.  The first of these, zero-block elimination, works by eliminating blocks of data consisting entirely of zeros while the second technique, data deduplication, eliminates identical copies of blocks of data that have already been stored. Finally, data compression is applied, which reduces the size of the unique blocks of data stored. By utilizing these techniques, VDO can dramatically increase

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Container-related Changes in Red Hat Enterprise Linux 7.5

With Red Hat Enterprise Linux 7.5.0 released this week, we wanted to take a look at a few of the container-specific changes for users of Red Hat Enterprise Linux and Red Hat Enterprise Linux Atomic Host.

Buildah Now Fully Supported

With Red Hat Enterprise Linux 7.5, we now fully support using Buildah to create Docker and OCI-compliant container images. Buildah was introduced in 7.4.3 as a tech preview, and moves to fully supported in this release.

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IT Optimization at Red Hat Summit 2018

Optimization – we’ve all heard this term a million times.  Without a doubt, it is a term that is used during company meetings, in the analyst community, and is, of course, a favorite topic to “pick on” for technology cartoons. In the technology sector IT optimization “carries the day”.  But, even then, “IT optimization” is a term that is often so overused that we all think we know what it is… but do we really?

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Ultimate Guide to Red Hat Summit 2018 Labs: Hands-on with RHEL

This year you’ve got a lot of decisions to make before you got to Red Hat Summit in San Francisco, CA from 8-10 May 2018.

There are breakout sessionsbirds-of-a-feather sessionsmini sessionspanelsworkshops, and instructor led labs that you’re trying to juggle into your daily schedule. To help with these plans, let’s try to provide an overview of the labs in this series.

In this article let’s examine a track focusing only on Red Hat Enterprise Linux (RHEL). It’s a selection of labs where you’ll get hands-on with package management, OS security, dig into RHEL internals, build a RHEL image for the cloud and more.

The following hands-on labs are on the agenda, so let’s look at the details of each one.

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Ultimate Guide to Red Hat Summit 2018 Labs: Hands-on with Security

This year you’ve got a lot of decisions to make before you got to Red Hat Summit in San Francisco, CA from 8-10 May 2018.

There are breakout sessionsbirds-of-a-feather sessionsmini sessionspanelsworkshops, and instructor led labs that you’re trying to juggle into your daily schedule. To help with these plans, let’s try to provide an overview of the labs in this series.

In this article, the focus narrows to security, where you can get hands-on with everything from cloud security, security compliance automation, developing secure solutions and digging in to container security.

The following hands-on labs are on the agenda, so let’s look at the details of each one.

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Guide to Red Hat Summit 2018 Linux Container Labs

This year you’ve got a lot of decisions to make before you got to Red Hat Summit in San Francisco, CA from 8-10 May 2018.

There are breakout sessionsbirds-of-a-feather sessionsmini sessionspanelsworkshops, and instructor led labs that you’re trying to juggle into your daily schedule. To help with these plans, let’s try to provide an overview of the labs in this series.

Our first article is starting with a focus on Linux containers, where you can get hands-on with everything from container security, containerizing applications, developing container solutions and digging in to container internals.

The following hands-on labs are on the agenda, so let’s look at the details of each one.

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Flying with a Safety Net: High Availability for SAP HANA in Public Clouds

For organizations running production applications, it is essential to provide 99.999% uptime for their mission critical applications and deploy their applications in a highly available configuration so that services are accessible at all times. This translates to accounting for all services within the application stack including storage, networking, and each service required to keep the application remaining online and active.

High Availability (HA) technology for Red Hat Enterprise Linux for SAP HANA is now supported on strategic Red Hat Certified Cloud and Service providers (CCSPs), starting with Microsoft Azure. The Red Hat High Availability Add-On is based on Pacemaker, an open source software clustering solution designed to protect the availability of applications. Support for HA works the same regardless of the deployment platform–bare metal or public clouds.

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UNIX/Linux and Me

This post is brought to you by Command Line Heroes, an original podcast from Red Hat.

Pure Gould

UNIX is C and C is for UNIX.

“I want to be an architect” was the mantra for some teenager in a British period TV series I watched in Ireland as a kid. For my final four years of secondary school (like high school) in Ireland it had become my mantra. I loved technical drawing and specifically drawing houses in perspective with shadow—it looked so realistic. I didn’t much care for computers as I couldn’t really afford one. I got to play on my girlfriend’s Commodore 64 and my dad bought me a scientific calculator that had about 2K of memory to write BASIC programs (for the millenials and younger, that was one of the first popular computer languages).

Studying computer science was not even on my radar—I wanted to continue learning the finer art of

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Power, Control Structures, and Open Source

This post is brought to you by Command Line Heroes, an original podcast from Red Hat.

My first encounter with computers

As a child, I perceived the world to be a pretty cold place filled with control structures—similar to the movie Tron. These control structures also seemed to be pretty imbalanced. When I was about 7 years old, I remember being at a local department store that had personal computers on display. They were powered up and each of them presented passing shoppers with an intimidating black screen, broken only by these white characters:

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I didn’t understand what it meant, or in retrospect, how this would sell computers. There were keyboards connected to each computer. I knew what they did from watching TV, so I hit a few keys. Characters began displaying across the screen and I soon discovered that you could also hit the “enter” key and the screen would change. It appeared that the computer was trying to interpret the words I was typing, but it refused to do anything except display the words

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