Keep Da Link

After years of pain playing with Solaris 10 Jumpstart's package clusters, I took some time to build an ultimate install profile for Solaris 10.

The available packages clusters are :

• SUNWCrnet is Reduced Network Support Software Group. -> lack of everything, from bash to bzip
• SUNWCreq is Core System Support Software Group. -> lack of bash, manpages...
• SUNWCuser is End User Solaris Software Group. -> include CDE Desktop, Mozilla, etc
• SUNWCprog is Developer Solaris Software Group. -> the same with libs and header files
• SUNWCall is Entire Solaris Software Group. -> EVERYTHING
• SUNWCXall is Entire Solaris Software Group Plus OEM Support. -> EVERYTHING with more drivers

I need a system where I could compile something without graphical interface! The SUNWCreq looks interesting but doesn't include o lot of usefull day-to-day administration utilities. The next package clusters include way too many things : choosing them for packages like GCC, you finish with xscreensaver and Firefox !

I've just made a profile (by reading /var/sadm/system/admin/.clustertoc) wich include only the (quite) strict minimum, with the tools that any descent admin needs :

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ZFS is all about performance (many levels of caching, pre-fetch, ...) and memory consumption :-)

Here are my last links about ZFS internals, it's worth a read if you plan to use ZFS on large productions :

• The slides of Adam Leventhal's talk for the OpenSolaris Storage Summit : ZFS, Cache, and Flash

• c0t0d0s0.org : a very good explanation of the ARC cache : most recently used pages, most frequently used pages and their ghosts lists Some insight into the read cache of ZFS - or: The ARC and the writing side

• The arc_summary.pl tool is very useful for analysis, made by Ben Rockwood with the kstat counters.

• Also by Ben Rockwood : ZFS in the Trenches is an overview of a real-life-production usage of ZFS : interesting counters and tuning hints at the different levels (monitoring, ARC, ZIL, Physical I/O, backup & replication), useful tools, and experience sharing. A must-read !

• And before anything, always refer to the ZFS Best Practices Guide of solarisinternals.com

If you have some interesting links about ZFS too, share them with us in the comments !

Thomas

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Improving MapReduce Performance in Heterogeneous Environments

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FriendFeed est un peu comme un aggrégateur de flux RSS mais pour les réseaux sociaux.

Vous indiquez vos éléments partagés dans flickr, wishlist amazon, lastfm, twitter, blog, linkedin, youtube, shared items de google reader, fichier edvige, facebook, etc, et le site les aggrège.

Vos amis font de même et vous avez ainsi un flux contenant toutes les updates de tout le monde (vous pouvez les classer ou filter certaines applis comme les commentaires de facebook ou twitter).

Je teste ça depuis aujourd'hui et l'outil me semble assez pratique, reste à voir si l'intérêt tiendra dans la durée... Je ne suis pas un grand fan des réseaux sociaux, le contenu généré par les "amis" (=connaissances) est en général sans grand intérêt, les applications tiennent du gadget, le tout ressemble malheureusement souvent (mais pas toujours) à une sorte de grand channel IRC 2.0.

Si vous ne partagez pas cet avis, insultez moi dans les commentaires :-)

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As announced early, Sun unveiled a new storage platform with the latest improvements in both hardware and software.

Here's a few details :

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If you didn't already know, the last update of Solaris 10 is out.

Sun Solaris is the professional/production version of OpenSolaris and this update import a lot of improvements already present in the last builds of OpenSolaris.

In the changelog, many interesting features :

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Within the major economical crisis, Sun Microsystems has a lot of troubles. The JAVA stock is low, one of its shareholder took the control of 21% of the company, the server market is suffering...

This new investor told that Sun is a "software company", some journalists asked Jonathan Schwartz (Sun's CEO) if Sun could do like AMD : sell it's hardware manufacturing divisions to another company.

Fujitsu, Sun's hardware partner, is also seeking a merger, journalists said.

Related links :

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In a recent post, Jeremy Zawodny talks about a blind test of different search engines. He suggests that a blind comparison of the search engine's results would be surprising... make the test with the following engines :

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Here's an article wich describe the replacement of lookupd by dscacheutil in Mac OS X 10.5 (Leopard) :

New in Leopard: dscacheutil

The way to flush the local DNS cache is now dscacheutil -flushcache

Une étude presque complète des nouveautés de Leopard : http://arstechnica.com/reviews/os/mac-os-x-10-5.ars/1

EDIT Akh: Ce que Toots ne dit pas, ce n'est pas juste les nouveautés "visibles": le nouveau dock ... On parle dans cet article de toutes les nouveautés filesystem, kernel ... Assez complexe et long à lire mais incroyablement intéressant sur le meilleur Os (Desktop) du monde :)