Tunnel vision

Less known Solaris Features book Version 0.28

I´ve integrated the CacheFS and the JET tutorials in the standard release of the LKSF book, thus now all links refering to the released version of the book should deliver...

Less known Solaris Features: CacheFS

Yet another tutorial finalized - this time about one of the really hidden features of Solaris - CacheFS. CacheFS is something similar to a caching proxy. But this proxy don´t...

Less known Solaris Features: CacheFS - Part 8: Conclusion

CacheFS is one of this features even some experienced admins aren´t aware of. But as soon as they try it, most of them can´t live without it. You should give...

Less known Solaris Features: CacheFS - Part 7: The future of CacheFS

CacheFS is one of this hidden gems in Solaris, it´s even that hidden, that it´s in sustaining mode since 1999. That means, that only bugfixes are made for this features...

Less known Solaris Features: CacheFS - Part 6: A usecase for CacheFS

Let´s take an example: Let´s assume you have 50 webservers that serve static content or that serves and executes .php files. You may have used scp or rsync to syncronize...

Less known Solaris Features: CacheFS - Part 5: On-demand consistency checking

Let´s assume you share a filesystem with static content (for example the copy of a cdrom) or a filesystem that changes on a regular schedule (for example at midnight every...

Less known Solaris Features: CacheFS - Part 4: The Cache

Okay, we have a working CacheFS mount but where and how is the stuff cached by the system. Let´s have a look at the cache. [root@gandalf:/var/cachefs/cache1]# ls -l total 6...

Less known Solaris Features: CacheFS - Part 3: A basic example

Okay … using CacheFS is really easy. Let´s assume, you have an fileserver called theoden We use the directory /export/files as the directory shared by NFS. The client in our...

Less known Solaris Features: CacheFS - Part 2: Theory

The history of CacheFS Sun didn´t introduced this feature for webservers. Long ago, admins didn´t want to manage dozens of operating system installations. Instead of this they wanted to store...

Less known Solaris Features: CacheFS - Part 1: Introduction

There is a hidden gem in the Solaris Operating Environment called CacheFS, solving a task many admins solve with scripts. Imagine the following situation. You have a central fileserver, and...

Nice tricks by merging photographs and video

I assume this demo reel of this project in computerized imaging shows the drain, where the next two or three bigger speed bumps and core multiplications will find their way...

links for 2008-08-17

NTSB Report AAR92-02: UNITED AIRLINES FLIGHT 811 (tags: aircraft accident)

Georgien und die NATO

Man mag ja von Gerhard Schröder und seiner Nähe zu Putin halten, was man möchte … aber bezüglich der Ferne des NATO-Beitritts von Georgien hat er recht. Wir haben auf...

Strange combination

Some things are even somewhat too cynical even for such cynical minds like me. The Independent writes in NHS should not save patients’ lives if it costs too much, says...

Award-winning restroom at Victoria Station

There is no award too unprobable to be not awarded. I found this in the gentlemens restroom at Victoria Station. Sorry for the blur, but i didn´t want to use...

ZFS cache hierarchy controls

An interesting new feature had it´s flag day. With PSARC 2008/393 a feature called “zfs primarycache and secondarycache prop” found it´s way into Solaris for build 96. With this properties...

Moellenkamps in London

As there was the question of a reader in my mailbox about the trip to London: It was a private trip. I invited my mother (my father can´t use the...

Immutable files

Darren Moffat shows a nice trick in his blog. He explains how you can make a file in a ZFS filesystem even immutable for the root user. Hmm, i should...

eLOM to iLOM

There are many people, who don´t like the eLOM of our Intel based x86 servers and want the iLOM of the Opteron servers instead. The cure is near: The eLOM...