Solaris Archive

ZFS has received built-in deduplication. "Deduplication is the process of eliminating duplicate copies of data. Dedup is generally either file-level, block-level, or byte-level. Chunks of data - files, blocks, or byte ranges - are checksummed using some hash function that uniquely identifies data with very high probability. Chunks of data are remembered in a table of some sort that maps the data's checksum to its storage location and reference count. When you store another copy of existing data, instead of allocating new space on disk, the dedup code just increments the reference count on the existing data. When data is highly replicated, which is typical of backup servers, virtual machine images, and source code repositories, deduplication can reduce space consumption not just by percentages, but by multiples."

One of the advantages of ZFS is that it doesn't need a fsck. Replication, self-healing and scrubbing are a much better alternative. After a few years of ZFS life, can we say it was the correct decision? The reports in the mailing list are a good indicator of what happens in the real world, and it appears that once again, reality beats theory. The author of the article analyzes the implications of not having a fsck tool and tries to explain why he thinks Sun will add one at some point.

The Linux desktop has come a long way. It's a fully usable, stable, and secure operating system that can be used quite easily by the masses. Not too long ago, Sun figured they could do the same by starting Project Indiana, which is supposed to deliver a complete distribution of OpenSolaris in a manner similar to GNU/Linux. After using the latest version for a while, I'm wondering: why?

The StormOS developers have announced the first beta, codenamed "Hail", of their desktop-oriented Nexenta-based distribution. Building upon the Nexenta Core Platform, StormOS offers a polished XFCE desktop and a handful of lightweight desktop applications out of the box. This beta is available in both direct download and torrent links, you can find them here.

The team at Sun behind OpenSolaris has unleashed OpenSolaris 2009.06 upon the world. This new release comes packed with new features, changes, improvements, and fixes, and is the first release of OpenSolaris for SPARC, adding support for UltraSPARC T1, T2 (Sun4v), and UltraSPARC II, III and IV (Sun4u). Read on for some of the improvements that stand out.

"The number and gee-whizness of features Sun Microsystems is putting into updates to both the Solaris 10 commercial operating system and the related OpenSolaris development release of Solaris are slowing. That's the best indication that Nevada - the code name for Solaris Next or Solaris 11 or whatever you want to call it - is getting closer to release. Closer doesn't mean close, however. According to sources speaking to The Reg, Sun is quietly telling customers that Solaris 11 is targeted for launch sometime around the middle of 2010."

ZFS and unbreakable upgrades were introduced in an earlier article. XercesTech has written a detailed article on how apt-get and zfs join forces to provide a worry-free upgrade experience. "While some operating systems provide the ability to roll back changes, they usually require significant time, or an experienced user with some external repair tools. The goal here is to be instant, if something goes wrong with an upgrade, it should be possible to boot into the old system without running any terminal commands, booting any rescue system or installation disc, or otherwise manually rolling things back."

Ever wanted a simple, compact, small, yet usable and relatively full-featured operating system using a SunOS kernel with most of its utilities written in Ada? Whatever the answer, now you can. "AuroraUX is a SunOS-derived kernel and userland. The core of the project are its utilities written in Ada. Other, poorly implemented features have been fixed or rewritten, too. Ada was chosen over other languages because it sucks the least." At least they're honest.

Devzones, short for development zones, is a type of virtualization found in the Nexenta distribution. It can be used to define a base developer environment, which can be easily cloned many times. These copies can easily be destroyed and recreated. Devzones are built upon Opensolaris Zones, which are extensions of a chroot-like environment for the entire installed system. In other words, it allows for virtualization of an Opensolaris environment (and variants of Linux), without the performance hit that is generally associated with virtualization. This article gives a practical introduction into using Devzones.

Even the most experienced Linux admin can sometimes feel frustrated trying to do a simple task in a new *nix environment like Solaris or BSD. This quick tutorial should ease the transition and clarify the most common terminologies in Solaris 10.

A new update of Solaris 10 has been made available today. There are a lot of ZFS enhancements and the next-gen file system is now supported as an installable root file system. You can download it for x86 and SPARC here. Other than that there are new drivers, security enhacements, etc. Fore more information, check the what's new page.

Hadoop is a software platform for processing huge amounts of data. It consists of the Hadoop Distributed FileSystem which is capable of storing petabytes of data across thousands of nodes. HDFS ensures that data is always available, even if underlying nodes get corrupted or fail. Hadoop also includes Map/Reduce, a programming model for breaking the data into smaller chunks of work and distributing that work across the nodes in the cluster.

This preview of the upcoming OpenSolaris 2008.11 release highlights aspects that should be of interest to systems and storage administrators who have to deal with large storage environments. ZFS is a big component that is referred to often, but there are new storage services and capabilities in addition to ZFS that might be overlooked and are quite compelling. Editor's Note: We ran an article yesterday that covered the surface level (eye-candy) improvements of the 2008.11 release of OpenSolaris.

This preview of the upcoming OpenSolaris 2008.11 release highlights aspects that should be of interest to systems and storage administrators who have to deal with large storage environments. ZFS is a big component that is referred to often, but there are new storage services and capabilities in addition to ZFS that might be overlooked and are quite compelling.
Editor's Note: We ran an article yesterday that covered the surface level (eye-candy) improvements of the 2008.11 release of OpenSolaris.