Macallan, 1999

Booze

The people behind The Macallan have managed to cultivate an 'exclusive' and luxurious brand perception, even though the distillery actually has the second largest production capacity in Scotland, right behind Glenfiddich. The distillery is Speyside’s best known heavyweight – and constantly embracing a new challenge : its current view is that the reaction between wood and sherry is also of great importance. This appears to wash out the harshest tannins and help release a rich, rounded spiciness. This is felt to be far more significant than any aromas and flavors imparted by the sherry itself. One rather extreme piece of research suggested that barely a third of aromas and flavors originated from the spirit, almost 60 per cent from the oak, and less than 10 per cent from the sherry.

That's why it's no surprise that my whisky reseller praised me the Macallan Gordon & McPhail 1999 vintage edition, as a must in every liquor cabinet. As I'm a man who's fond of good advice, the bottle was mine some minutes later.

The color : amber, dark gold.
The nose : sweet, fruity, typical Speyside. So far no surprises.
The taste : oh so sweet, could be creamy rum for what it's worth. Apples, honey, raisins. Some chocolate and malt, and after that, light sherry tones flowing in, with an amazing caramel candy aftertaste that lingers forever. Wonderfully complex and ditto balanced.

This Macallan is not good, it's excellent ! One of the best Speysides I've ever tasted. So sweet, so friendly, such a marvellous combination of sherry & whisky tastes.

Perladvent 2010

Perl

Does Christmas reminds you of snowy weather, eggnog and turkeys ? Not here with us ! We rejoice every year in the arrival of the Perl Advent calendar, this year again also in a Perl6 edition.

C-klas

Pets

Verleden zondag heb ik nogal onverwachts beslist om met onze 9 maand jonge Landseer hond mee te doen met het overgangsexamen van de B- naar de C-klas. En zie, tot mijn grote verbazing zijn we geslaagd - weliswaar met de achterpoten over de sloot, maar geslaagd is geslaagd, niet ? Na amper 2 maand in de B-klas, blijven we door de klassen heen sjezen.
En nu ? In de C-klas wordt het overgrote deel van de oefeningen zonder leiband gedaan, en wordt van de hond een perfecte gehoorzaamheid verwacht. Dat komt wel goed, maar de eerste reeks lessen zullen zwaar uitvallen, vrezen we...

Spanning tree protocol posture

Humor

You know, when 2 penguins love each other very much...
you know, they do stuff like forking the code, or piercing the firewall...

Solaris core dump analysis with SUNWscat

OpenSolaris

I've previously tackled how Solaris core dumps can be investigated with mdb. There's another utility (comparable with Q4 on HP_UX), called SUNWscat. Scat is a tool to analyze kernel dumps (pun probably intended). Just download the SUNWscat package, install it on your server, and wait for a kernel crash to happen. When this happened, you'll find a unix.0 and vmcore.0 in the coredump directory (default /var/crash). When you fire up SUNWscat, you'll be presented with the following screen :

# scat 0
  Solaris[TM] CAT 4.1 (build 526) for Solaris 10 64-bit SPARC(sun4u)

  Copyright © 2003 Sun Microsystems, Inc. All rights reserved.
  Patents Pending. Use is subject to license terms.
  Sun Microsystems proprietary - DO NOT RE-DISTRIBUTE!

opening vmcore.0 ...dumphdr...symtab...core...done
loading core data: modules...panic...memory...time...misc...done
loading stabs...read_type_db: Wrong number of lines in database, or database
doesn't end in a newline
unable to load any stabs file
patches... - NOT AVAILABLE (No such file or directory) done

core file:      /var/crash/vmcore.0
user:           Super-User (root:0)
release:        5.10 (64-bit)
version:        Generic_112233-11
machine:        sun4u
node name:      boson
domain:         arda.org
hw_provider:    Sun_Microsystems
system type:    SUNW,Sun-Fire-V210
hostid:         837844c7
time of crash:  Tue Apr 22 11:49:52 EDT 2008
age of system:  22 hours 5 minutes 4.48 seconds
panic cpu:      0 (ncpus: 8)
panic string:   free: freeing free block, dev:0x200000016e, block:32032, ino:6057255, 
                fs:/homes

running sanity checks.../etc/system...ndd...sysent...misc...done
SolarisCAT(vmcore.0)>

The first thing you probably want to do, is investigating the crash reason :

SolarisCAT(vmcore.0)> analyze
PANIC: free: freeing free block, dev:0x%lx, block:%ld, ino:%lu, fs:%s
[...]
==== printing for generic panic information ====
cpu 0 had the panic

==== panic thread: 0x2a1003f7d40 ==== cpu: 0 ====
==== panic kernel thread: 0x2a1003f7d40  pid: 0  on cpu: 0 ====
cmd: sched

t_stk: 0x2a1003f7b50  sp: 0x1437751  t_stkbase: 0x2a1003f4000
t_pri: 60(SYS)  pctcpu: 0.000000  t_lwp: 0x0
t_procp: 0x1438518(proc_sched)  p_as: 0x1438400(kas)
last cpuid: 0
idle: 50 ticks (0.50 seconds)
start: Mon Apr 21 13:45:07 2008
age: 79485 seconds (22 hours 4 minutes 45 seconds)
stime: 2132 (22 hours 4 minutes 43.16 seconds earlier)
tstate: TS_ONPROC - thread is being run on a processor
tflg:   T_TALLOCSTK - thread structure allocated from stk
        T_DONTBLOCK - for lockfs
        T_PANIC - thread initiated a system panic
tpflg:  none set
tsched: TS_LOAD - thread is in memory
        TS_DONT_SWAP - thread/LWP should not be swapped
        TS_SIGNALLED - thread was awakened by cv_signal()
pflag:  SSYS - system resident process
        SLOAD - in core
        SLOCK - process cannot be swapped

pc: 0x104a720   unix:panicsys+0x44:     call    unix:setjmp
startpc: 0x11a53f8      ufs:ufs_thread_delete+0x0:      save    %sp, -0xd0, %sp

unix:panicsys+0x44 (0x14a3158, 0x2a1003f74a0, 0x1438120, 0x1, 0x0, 0x0)
[...]
unix:thread_start+0x4 (0x3000026e828, 0x0, 0x0, 0x0, 0x0, 0x0)
-- end of kernel thread's stack --

SolarisCAT(vmcore.0)>

The proc command, for example, can tell you about the processes that were running at the time your system crashed. These processes are listed by default in reverse PID order.

SolarisCAT(vmcore.0)> proc

    addr       pid    ppid   uid      size      rss     swresv   time  command
------------- ------ ------ ------ ---------- -------- -------- ------ ---------
0x30003c8e040    283      1      0    3776512  1646592  1302528  90118 /usr/sbin/ssmon
0x30003c96a50    279      1      0    9306112  2514944  1769472     19 /usr/sbin/ssserver
0x30003bee030    256      1      0   27656192  2596864  1138688     57 /usr/sbin/nscd
0x30003c8ea58    243      1      0    2506752  1703936   466944      7 /usr/sbin/cron
0x30003c96038    240      1      0   18874368  2170880  2711552      7 /usr/sbin/syslogd
0x30000f60010    225      1      0    7217152  2400256  1146880    170 /usr/lib/autofs/automountd
0x300020c4a40    217      1      0    2260992  1572864   598016      3 /usr/lib/nfs/lockd
0x300020c5458    213      1      1    4677632  1974272   876544      2 /usr/lib/nfs/statd
0x300020c4028    201      1      0    2629632  2048000   835584     12 /usr/sbin/inetd -s
[...]

Advanced use of scat requires an in-depth understanding of the Solaris kernel. However, you can get a lot of useful information by using just the basic commands.

Pages

Subscribe to Kristof.Willen.be RSS