I’ve started to write a framework for apache benchmark (ab) to be able to run smoothly and leisurely ab test in background and just get the summarized results back. I’ve shared it on github: https://github.com/charlesnagy/absuite Feel free to comment, fork or do whatever with it. Ideas … Continue reading
What happened if you had a big partition with a lot of free space but you are not able to create a file or copy anything there? The linux said “no space left on device”. The trivial answer was you’re out of inodes.
I didn’t think I will ever hear … Continue reading
We had a webserver running smoothly until extreme huge traffic appeared on the bond0 interface shown in cacti. The traffic was near the double of the loadbalancer’s in- and outbound traffic. The memcached was continuously rejecting new connections.
Memcache hit/miss ratio was almost perfect 99% / 1%. However … Continue reading
This is a quick impression about the freshly installed Solr 3.5 server.
The base system is a Amazon Microinstance equivalent virtual machine running on a HP Microserver. The VM has 600MB ram and 8GB HDD.
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[root@localhost ~]# cat /proc/cpuinfo processor: 0 model name: AMD Athlon(tm) II Neo N36L Dual-Core Processor stepping: 3cpu MHz: 1297.731 cache size: 1024 KB processor: 1 model name: AMD Athlon(tm) II Neo N36L Dual-Core Processor stepping: 3 cpu MHz: 1297.731 cache size: 1024 KB |
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[root@localhost ~]# hdparm -tT /dev/sda /dev/sda: Timing cached reads: 1810 MB in 2.00 seconds = 904.47 MB/sec Timing buffered disk reads: 140 MB in 3.07 seconds = 45.59 MB/sec |
The data backend … Continue reading
On February 20th Arkon Zrt. gave place for the current DevOps MeetUp. The subject was Continuous Integrations, Continuous Deployment and Release Management. I was the chosen one who can have presented the way we’re doing CI at Arkon Zrt. for ingtlan.com and koponyeg.hu websites.
Both … Continue reading
I’ve just find a copy of Hagakure in a martial art shop. This book is the Codex of Bushido. Written on the grounds of Yamamoto Tsunemoto’s instructions. Hagakure often claimed to be the “Way of Dying” but if someone really deeply understands the basics will find out that it’s the … Continue reading
When I started the university we learned about Microsoft Project, waterfall modell, V-modell and RUP. But time’s changing. With the keyword agile there’s a lot of upcoming development methodology. Scrum and Kanban are getting more and more popular in software development circles. The common problems about methodologies are that they have … Continue reading
The story happened with a webshop application running on Amazon EC2 microinstances. Actually on two instance. Amazon business model is basically simple, they ask money for only three things: Cpu time, IOPS and network traffic. Everybody (including me) thinks for the first time network traffic will be the bottleneck until … Continue reading
“An expert is a man who has made all the mistakes which can be made, in a narrow field.” - Niels Bohr
Don't be afraid to fail, to test, to experiment. This is what teaches you things you cannot learn from books. Everything written, told, heard are things somebody already know. If you want to be better in something you have to do things that nobody did before and push those boundaries as much as you can.
