Charles Nagy

Python / Django test and benchmark

By charlesnagy May 6, 2012 May 6, 2012 Benchmark

Initializing

First initialize the mysql database from a previous dump as we did on the PERL virtual box.

/etc/init.d/mysql start
mysql -e 'show databases'
[root@localhost ~]# mysql -e 'show databases'
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+

/etc/init.d/mysql start

mysql -e 'show databases'

[root@localhost ~]# mysql -e 'show databases'

+--------------------+

| Database |

+--------------------+

| information_schema |

| mysql |

| performance_schema |

| test |

+--------------------+

mysql -e 'create database gumibomba_dev'
mysql gumibomba_dev &lt; import.sql

1 2	mysql -e 'create database gumibomba_dev' mysql gumibomba_dev < import.sql

Install the framework

Check for python version. And if needed install python setuptools. After it install django is very easy and can be done in 5 minutes.
… Continue reading

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PHP / Symfony 1.2 with Propel test and benchmark

By charlesnagy May 6, 2012 May 18, 2012 Benchmark

Initializing

Initialize the mysql database from a previous dump as I did earlier.

/etc/init.d/mysql start
mysql -e 'show databases'
[root@localhost ~]# mysql -e 'show databases'
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+

/etc/init.d/mysql start

mysql -e 'show databases'

[root@localhost ~]# mysql -e 'show databases'

+--------------------+

| Database |

+--------------------+

| information_schema |

| mysql |

| performance_schema |

| test |

+--------------------+

mysql -e 'create database gumibomba_dev'
mysql gumibomba_dev &lt; import.sql

1 2	mysql -e 'create database gumibomba_dev' mysql gumibomba_dev < import.sql

Install PHP and Symfony 1.2

Unlike previous test subjects php doesn’t come with the default linux install. So first of all we need some php package. Because php doesn’t have such tool like … Continue reading

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AB – Apache Benchmart suite

By charlesnagy April 8, 2012 April 8, 2012 Benchmark

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

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No space left on device

By charlesnagy March 7, 2012 March 7, 2012 IT

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

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Memcache anomaly

By charlesnagy March 5, 2012 March 5, 2012 IT

Symptoms

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.

Investigation

Memcache hit/miss ratio was almost perfect 99% / 1%. However … Continue reading

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Solr benchmark – first blood

By charlesnagy February 29, 2012 February 29, 2012 Benchmark

This is a quick impression about the freshly installed Solr 3.5 server.

Enviroment

The base system is a Amazon Microinstance equivalent virtual machine running on a HP Microserver. The VM has 600MB ram and 8GB HDD.

System info & benchmarks

[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

[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

[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

[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

Solr performance

Full index

The data backend … Continue reading

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DevOps meeting – Continous Intergration

By charlesnagy February 25, 2012 February 25, 2012 Events

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

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Hagakure

By charlesnagy February 22, 2012 February 22, 2012 Lifestyle

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

2 Comments

Be agile or die tryin’

By charlesnagy February 18, 2012 October 10, 2014 methodology

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

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Unindexed queries can be really expensive

By charlesnagy February 14, 2012 June 3, 2014 mysql

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

Python / Django test and benchmark

Initializing

Install the framework

PHP / Symfony 1.2 with Propel test and benchmark

Initializing

Install PHP and Symfony 1.2

AB – Apache Benchmart suite

No space left on device

Memcache anomaly

Symptoms

Investigation

Solr benchmark – first blood

Enviroment

System info & benchmarks

Solr performance

Full index

DevOps meeting – Continous Intergration

Hagakure

Be agile or die tryin’

Unindexed queries can be really expensive

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