Archive for the ‘Uncategorized’ Category

External IaaS vs ROI ? An impressive mind opening comment on Chuck’s EMC blog…

Wednesday, December 28th, 2011

Please take a look on first comment by “nate” on Chuck’s EMC blog article titled
“Why The Cloud Discussion Is So Polarizing”… , he writes this:

(..) I have spent a bit over a year managing systems in the Amazon cloud and I have to say it is the most frustrating experience ever. I’m flying to Atlanta tomorrow night to start installing hardware to move my current company out of it. ROI? 6 months or less. And we get tons more functionality, uptime, less latency etc. (..)

Moving blog to http://jakub.wartak.pl/blog

Friday, September 11th, 2009

Please update references, I’m moving my blog to http://jakub.wartak.pl/blog .

I’m stunned (the most beautiful copyright notice ever)

Tuesday, November 11th, 2008

“Copyright (C) 2002 by Discovery Institute. All rights reserved.

In the interest of stimulating debate on the issues discussed in this book, the Discovery Institute gives permission for copies of this book to be freely downloaded from the Internet, distributed in electronic form to others, and printed out and distributed to others for non-commercial purposes as long as full credit is given to Discovery Institute and the test is not altered. Distribution, copying and printing for educational use is particularly encouraged,”

from the book “Are We Spiritual Machines? Ray Kurzweil vs. The Critics of Strong AI” (you can buy it from Amazon as I did – Ray’s books are worth 100x more than their listed price…)

B.Sc.

Thursday, February 28th, 2008

It’s time to sum up several things:

  • I definetley need a rest(!). It’s my priority one. The problem is that I’m addicted to DOING something…
  • On 08.02.2008 I successfully got my Bachelor in Science. Basically we have implemented cluster using Solaris, Solaris Cluster, Oracle, Linux Virtual Servers, Apache2 and JBoss (I had to use Oracle DataGuard instead of RAC… as all of it was implemented in-home, see below for diagram). I’ll probably release webpanel for Solaris Jumpstart+FLARs (MySQL, PHP) some day under GPL. It was one of add-on projects for that engineering work.
  • Since about 15.02.2008 I’m studing for Master of Science on Computer Science, on Data Processing Technologies speciality track (emphasis is put on all databases related stuff)
  • Currently I’m preparing for Oracle Certified Associate (Database Administrator) exam…
  • It’s time to refresh my site after some period of inactivity.

Final architecture of cluster (it was my playground for testing some unknown for me software and features; it is NOT the real architecture I would suggest anyone to use ;) ):

Final architecture of cluster


Dilbert Engineer series:

Have fun! :)

[Polish only]: Wspolczuje uzytkownikom nasza-klasa.pl

Tuesday, January 8th, 2008

Choc sam nigdy nie uzywalem tego portalu (zarejestrowany nie jestem i co najlepsze – zamiaru rejestrowac sie nie mam) wspolczuje wszystkim korzystajacym z tego portalu… Przeczytalem, ze sie przenosili (do Poznania!) i pare rzeczy sobie sprawdzilem. Teraz troche konkretow(dlaczego wspolczuje ;) ):

[vnull@xeno ~]$ host d.nasza-klasa.pl
d.nasza-klasa.pl has address 89.149.244.93
d.nasza-klasa.pl has address 89.149.244.98
d.nasza-klasa.pl has address 89.149.244.99
d.nasza-klasa.pl has address 89.149.244.101
d.nasza-klasa.pl has address 89.149.244.112
d.nasza-klasa.pl has address 89.149.244.124
d.nasza-klasa.pl has address 89.149.244.183
d.nasza-klasa.pl has address 89.149.242.123
d.nasza-klasa.pl has address 89.149.242.124
d.nasza-klasa.pl has address 89.149.242.138
d.nasza-klasa.pl has address 89.149.242.139
d.nasza-klasa.pl has address 89.149.242.228
d.nasza-klasa.pl has address 89.149.244.49
d.nasza-klasa.pl has address 89.149.244.50
d.nasza-klasa.pl has address 89.149.244.51
d.nasza-klasa.pl has address 89.149.244.52
d.nasza-klasa.pl has address 89.149.244.53
d.nasza-klasa.pl has address 89.149.244.55
d.nasza-klasa.pl has address 89.149.244.78
d.nasza-klasa.pl has address 89.149.244.80
d.nasza-klasa.pl has address 89.149.244.82
d.nasza-klasa.pl has address 89.149.244.84
d.nasza-klasa.pl has address 89.149.244.88

Na d.nasza-klasa.pl przekierowuje zaraz po wejsciu na http://nasza-klasa.pl. Myslalem ze DNS load-balancing odszedl w zapomnienie ladnych pare lat temu… a tu prosze. Pytanie, jak przekierowuja przeciazony serwer – pojecia nie mam.

Dwa, ze:
[vnull@xeno ~]$ time HEAD http://nasza-klasa.pl
200 OK
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Connection: close
Date: Tue, 08 Jan 2008 15:58:27 GMT
Pragma: no-cache
Server: Apache
Vary: Accept-Encoding
Content-Type: text/html; charset=UTF-8
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Client-Date: Tue, 08 Jan 2008 15:59:14 GMT
Client-Peer: 89.149.242.124:80
Client-Response-Num: 1
Set-Cookie: nk_session=8E8-,Yx2dHFUp3tD2PZhXbO7aef; path=/; domain=.nasza-klasa.pl
real 0m19.332s
user 0m0.165s
sys 0m0.032s

Co mnie boli (a raczej nie mnie – tylko pewnie uzytkownikow tego portalu) to wymuszony brak cachowania? Zupelnie jakgdyby nigdy nie czytali http://highscalability.com/ .

BLU-108

Saturday, March 31st, 2007

I’ve always been interested in military equipment – just take a look on this cluster bomb presentations:

Video-entry of the mode of operation of the BLU-108 submunition by means of a happend US-operation in Iraq 2003. (computer simulation) 

BLU-108 submunition Infospot - real presentation, not a simulation

Another computer simulation

Zupki chinskie

Sunday, March 18th, 2007

Post z dnia: 27/01/2007

Uwielbiam zupki chinskie/ekspresowe z makaronem {Vifon, Amino, itd} bo… zawsze mi sie kojarza z ASG ;]

evolve() || die()

Sunday, March 18th, 2007

Post z dnia: 01/01/2007 && 02/01/2007

Zapoznaje sie z:

  • Oracle RMAN – disaster recovery, czyli jak podniesc instancje np po “rm -rf /u03″, jeszcze tylko sie gubie z controlfiles i PFILE.
  • BEA WebLogic Server – trzeba bedzie napisac jakies HelloWorld korzystajce z ConnectionPooli serwera aplikacji. Wiec czeka mnie chyba JNDI + JDBC… kiedys.
  • AnyCast – eksperyment na labie Ciscowym, dwa serwery DNS – ospfd na serwerach DNS – dziala. Rzeklbym ze RADIUSa tez by sie tak dalo “zhighavabilitowac” :) W produkcji kwestia wylaczania rozglaszania w przypadku braku odpowiedzi na DNS query…

Niestety to tyle bo niedlugo zaswieci sie czerwona lampka z napisem SESJA czyli System Eliminacji Studentow Jest Aktywny…

Tuesday, March 13th, 2007

Post z dnia: 28/12/2006

Pierwsze skojarzenie do slowa “elf” ?

Format plikow wykonywalnych … ( zostalo mi po zabawach z infekcjami ELFow z phracka )

Do slowa “cos” ? y=A*cos(2*Pi*f+fi). Pytanie: czy jestem chory i nienormalny ( ktos do mnie na GG napisal “cos” – w sensie jakiejs rzeczy a mi sie skojarzylo … )

Ciekawostka/OpenSolaris o (nie)cachowaniu pewnych requestow IO w kernelu:

/usr/src/uts/common/syscall/rw.c ( syscalle read(),write() i pochodne ):


54 #define COPYOUT_MAX_CACHE (1<<17) /* 128K */
55
56 size_t copyout_max_cached = COPYOUT_MAX_CACHE; /* global so it's patchable */

71 /*
72 * Native system call
73 */
74 ssize_t
75 read(int fdes, void *cbuf, size_t count)
166 /*
167 * Only use bypass caches when the count is large enough
168 */
169 if (bcount <= copyout_max_cached)
170    auio.uio_extflg = UIO_COPY_CACHED;
171 else
172    auio.uio_extflg = UIO_COPY_DEFAULT;

Identycznie jest dla write(). Z jakiegos *.h #define’y:


/*
* uio_extflg: extended flags
*
* NOTE: This flag will be used in uiomove to determine
* if non-temporal access, ie, access bypassing caches,
* should be used. Filesystems that don't initialize this
* field could experience suboptimal performance due to
* the random data the field contains.
*/

/* no special options to copy */
#define UIO_COPY_DEFAULT 0x0000

/* copy should not bypass caches */
#define UIO_COPY_CACHED 0x0001

Ja Anonimowy Vielce Aloholik… = JAVA

Tuesday, March 13th, 2007

Post z dnia: 24/12/2006

chyba zaczne pic konkretniej – wlasnie stworzylem cos takiego:

<List <List <List <Integer>>>>

( do “przepychania” przez SwingWorkera danych na potrzeby process() i publish() kilku list list integerow… )

ida swieta…

Tuesday, March 13th, 2007

Post z dnia: 22/12/2006

… czas obludy, pozogi i demagogii nadchodzi. Pragne rowniez poinformowac wszystkich ze pozostawie wszelkie zyczenia – przeslane droga elektroniczna – bez odpowiedzi.

?

Tuesday, March 13th, 2007

Post z dnia:  31/10/2006

/me jest mizantropiczne.

BTW: nie ma to jak targetting SPAMu: Hott youung amateeur teenagerss hardd bangged by doogs.

screen z kilkoma userami

Tuesday, March 13th, 2007

Post z dnia 15/10/2006:

http://muse.19inch.net/~daf/misc/multiuser-screen.html

chetnie przyjme na wage

Tuesday, March 13th, 2007

Post z dnia: 23/09/2006

Przyjme na wage / 1piwo za 1kg ;) , transport na moj koszt wlasny:
- systemy na ktorych chodzi AIX
- systemy na ktorych chodzi HP-UX
- wszelkie SPARCi, byle zeby Solaris 9 przynajmniej ruszyl.
Bo chec nauki we mnie wielka, czyli jezeli ktos chce sie pozbyc zlomu, chetnie odzlomie Wasze pokoje ;]

Chetnie bym takze polizal OpenVMSa…

J2EE…

Tuesday, March 13th, 2007

Post z dnia: 17/09/2006

Nigdy nie lubilem Javy, ale coz takie czasy: moja pierwsza “zdeplojowana” aplikacja na serwerze aplikacyjnym ( JBoss ). Gdybym wszystkie te czynnosci mialbym wykonywac sam a nie przez Eclipse to ostro k**** bym rzucalbym potencjalnie, realia sa takie ze i tak ostro klnalem.

Slowem: jakos nie widze metodyki KISS w procesie deployowania J2EE, wole czyste Makefiles…

Scons to juz przy tym wszystkim potega ( http://www.scons.org/ ).