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...
Zuviel unterwegs
Gestern London, heute Rostock, morgen Fluch … aeh … Flug fuer Dresden buchen … ich bin zuviel unterwegs ..
Nachholen
Es ist irgendwie schon seltsam wenn man 2 Jahre im Leben eines Menschen, den man aus den Augen verloren hat, in 45 Minuten lesenderweis nachholt, weil dieser jetzt auch ein...
LKSF Sneak Preview: CacheFS
I´m writing a new tutorial for the Less Known Solaris Feature series. This time it´s about CacheFS. CacheFS is one of the really hidden gems of Solaris. You can find...
My Canon left me for a repair
Just left my Canon 40D at the repair shop. 140 to 300 Euro for an defect Compact Flash Card Slot. 140 Euro in the case they can solder in some...