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cpan – The Perl Module Manager


Posted by Artem Russakovskii on October 12th, 2007 in Linux, Programming

Updated: March 19th, 2008

cpan is a perl module manager. To get into cpan, login as root and type in

cpan

Install a module:

cpan install MODULE

Upgrade a module:

cpan upgrade MODULE

Reinstall a module or force install in case of failed tests:

force install MODULE

See a list of upgradable modules:

r

See cpan configuration (that's the letter 'o'):

o conf

Update an option in cpan configuration:

o conf OPTION_NAME OPTION_VALUE

It is always nice to:

upgrade CPAN
install Bundle::CPAN

If there's an error making a Perl module, it can be caused by a missing make path in cpan configuration. In …

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10

sysbench – Linux Test Bench


Posted by Artem Russakovskii on October 12th, 2007 in Databases, Linux

Updated: October 22nd, 2011

sysbench – Linux test bench. Easy as pie to test CPU, memory, threads, mysql, and disk performance.

Full description is available here: http://sysbench.sourceforge.net/docs/

install mysql, mysql-devel
wget http://downloads.sourceforge.net/project/sysbench/sysbench/0.4.12/sysbench-0.4.12.tar.gz
tar xvzf sysbench*gz
cd sysbench*
./configure && make install

mysql tests

This will run 10 separate consecutive mysql tests using an InnoDB table type, each with 100 mysql threads, doing a total of 1000 various SQL operations per test. Then it will print the total time they took to finish:

sysbench --test=oltp --mysql-user=USER --mysql-password=PASS --mysql-db=test \
  --mysql-host='HOST' --mysql-table-engine=innodb prepare
 
time perl -e "foreach(1..10){print \`sysbench --max-requests=1000 --test=oltp \
  --mysql-user=USER --mysql-password=PASS

…

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