Seorang staff super junior tampak kebingungan dengan pembicaraan ini, untuk mengetahui apa yang perlu diupgrade, solusinya gampang : pasang alat ukur di perangkat sebelumnya! Tanpa memasang alat ukur, kita hanya bisa bicara ‘tampaknya’ dan ‘rasanya’ hehe.

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Sebenarnya banyak aplikasi yang bisa digunakan untuk resource monitoring terhadap ‘resource usage’ suatu system. Dalam hal ini saya menggunakan Ganglia, resource monitoring tool yang sering dipake pada cluster computer. Monitoring selama beberapa minggu, menghasilkan grafik berikut ini :

CPU Usage - Ganglia

Pada grafik terlihat, CPU waiting-nya cukup tinggi, bahkan mencapai 50%. Server ini ‘dihuni’ kurang lebih 25 container/VPS. Pada grafik lain (tidak saya tampilkan), beban CPU di bawah 50% dan sedikit sekali swap. Secara sederhana, server dengan 8 core CPU ini banyak ‘nganggur’-nya. Indikasi terhadap CPU dan memory yg masih under usage menunjukkan terjadi bottleneck komunikasi pada perangkat lain, salah satunya harddisk drive. Solusi yg mungkin bisa diterapkan yaitu mengganti HDD dengan buffer/RPM tinggi, memisahkan drive untuk system dengan data, ganti ke SSD??

#!/bin/bash

MYTZ=`date | awk '{print $5}'`
TOM=$(TZ=$MYTZ-24 date +%d)

#echo $TOM
if [ $TOM == 01 ]
 then
        echo "Last Day of the month!"
        # Enter your monthly code here
 else
        echo "Today is not the last day!"
fi

this problem coming at my 4.5 years age of iBook G4 last genre. It happenned when I was pluging on power source, the light changing frequently from green-orange-green-orange. Unfortunately, when the orange light is on, we can’t turn on the iBook.

It’s caused by gold/copper metal inside that female socket had loose/can’t tight anymore. The quick solution for this problem is by change all power board including power socket, in my case, I use another iBook’s part (cannibal).  The picture below, show you the shape of iBook power board and it’s female socket.

iBook G4 Power Socket Board

Angry Birds

Awal perkenalan dengan game ini gara-gara ngeliat temen, asik main pake Androidnya. Lucu game nya, adiktif, lumayan klo bengong nungguin sesuatu, bisa main game ini.

Ga sengaja pas browsing aplikasi-aplikasi untuk Mac di Apps Store (aktifkan dengan upgrade version OS X mu!), muncul game ini sebagai Top Download di Apps Store. Karena masih penasaran dan telanjur pernah main, akhirnya dibeli juga game ini. Lumayan, USD4.99. So, buy buy buy!

Then I found that my /var partition already full of data :

/dev/mapper/VolGroup00-LogVol04 3.9G  3.7G     0 100%     /var

I deleted some files on /var/spool/mclientqueue . But I see there’s no change in df size report, it says the same. Although from du stats, only 483MB of disk usage. Using lsof command, I found some process were still accessing /var partition :

sendmail  30760 hansa    3uW  REG  253,4   9875456 426064 /var/spool/clientmqueue/dfoB8M51cn030760 (deleted)

sendmail  31030 hansa    3uW  REG  253,4  98238464 360504 /var/spool/clientmqueue/dfoAJJK1Wa031030 (deleted)

sendmail  31653 hansa    3uW  REG  253,4 121421824 360469 /var/spool/clientmqueue/dfoAEJK1MX031653 (deleted)

Problem SOLVED when all process (sendmail process in here) are killed!

/dev/mapper/VolGroup00-LogVol04     3.9G  483M  3.3G  13%    /var

Example :
tar -czvf file-result.tar.gz /path/to/file/or/folder/for/archiving –exclude “/path/to/exclude”

Example :
mysqldump -u 412843_reebonzsg -p –skip-add-locks –skip-lock-tables db_name \
> dbfile_dump.sql

By default, awstats will process data at monthly based, but for several purposes I need more details. Awstats has ‘databasebreak’ feature to separate analysis result based on monthly, daily, and hourly. But still, I need more details, so my friend from Teltics help me patch awstats source code.

So, you can use it by :

# perl awstats.pl -config=awstas.domain.conf -update -databasebreak=minute

awstats.pl

The pros of using Palring as your Messenger Apps are :
- lightweight apps
- easy to setup
- can do many Yahoo! ID also others messenger ID

and the cons because of Palringo is :
- can drain your battery faster haha (joke..)

Gallery2 Troubleshoot Page

Choose ‘Cache Maintenance‘ then follow the step. Thanks!