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Showing entries 1 to 30 of 1132 Next 30 Older Entries

Displaying posts with tag: Linux (reset)

libssl.so.6: cannot open shared object file with Debian/CentOS
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Actually, I found this error many times, while installing MySQL/Percona servers with MySQL Sandbox. To resolve this issue, first, you have to make sure that, SSL is installed /update properly. sudo apt-get update sudo apt-get install libssl1.0.0 libssl-dev After installing Continue reading →   [Read more...]
FATAL: failed to initialize database driver! with Sysnbech 0.4.X
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Recently, I came through with this error. It was weird because I have never seen this error earlier. [root@percona-pxc55-1 nilnandan]# sysbench --test=oltp --oltp-table-size=1000000 --mysql-db=dbtest --mysql-user=msandbox --mysql-password=msandbox --mysql-socket=/tmp/mysql_sandbox5537.sock prepare sysbench 0.4.12: multi-threaded system evaluation benchmark FATAL: no database driver specified FATAL: Continue reading →   [Read more...]
How To Install Nginx With PHP And MySQL (LEMP Stack) On CentOS 7
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How To Install Nginx With PHP And MySQL (LEMP Stack) On CentOS 7

Nginx (pronounced "engine x") is a free, open-source, high-performance HTTP server. Nginx is known for its stability, rich feature set, simple configuration, and low resource consumption. This tutorial shows how you can install Nginx on a CentOS 6.5 server with PHP support (through PHP-FPM) and MySQL (Mariadb) support.

How To Install Nginx With PHP5 (And PHP-FPM) And MySQL Support On CentOS 6.5
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How To Install Nginx With PHP5 (And PHP-FPM) And MySQL Support On CentOS 6.5

Nginx(pronounced "engine x") is a free, open-source, high-performance HTTP server. Nginx is known for its stability, rich feature set, simple configuration, and low resource consumption. This tutorial shows how you can install Nginx on a CentOS 6.5 server with PHP5 support (through PHP-FPM) and MySQL support.

Installing Apache2 With PHP5 And MySQL Support On Ubuntu 14.04LTS (LAMP)
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Installing Apache2 With PHP5 And MySQL Support On Ubuntu 14.04LTS (LAMP)

LAMP is short for Linux, Apache, MySQL, PHP. This tutorial shows how you can install an Apache2 webserver on anUbuntu 13.04 server with PHP5 support (mod_php) and MySQL support.

Installing Lighttpd With PHP5 (PHP-FPM) And MySQL Support On OpenSUSE 13.1
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Installing Lighttpd With PHP5 (PHP-FPM) And MySQL Support On OpenSUSE 13.1

Lighttpd is a secure, fast, standards-compliant web server designed for speed-critical environments. This tutorial shows how you can install Lighttpd on an OpenSUSE 13.1 server with PHP5 support (through PHP-FPM) and MySQL support. PHP-FPM (FastCGI Process Manager) is an alternative PHP FastCGI implementation with some additional features useful for sites of any size, especially busier sites. I use PHP-FPM in this tutorial instead of Lighttpd's spawn-fcgi.

How To Run privacyIDEA With Apache2 And MySQL On Ubuntu 14.04 LTS
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Howto run privacyIDEA with Apache2 and MySQL On Ubuntu 14.04 LTS

We use the latest 1.0dev0of privacyIDEA. It is available via the python package index or via github.

Installing Lighttpd With PHP5 (PHP-FPM) And MySQL Support On Ubuntu 14.04LTS
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Installing Lighttpd With PHP5 (PHP-FPM) And MySQL Support On Ubuntu 14.04LTS

Lighttpd is a secure, fast, standards-compliant web server designed for speed-critical environments. This tutorial shows how you can install Lighttpd on an Ubuntu 14.04 server with PHP5 support (through PHP-FPM) and MySQL support. PHP-FPM (FastCGI Process Manager) is an alternative PHP FastCGI implementation with some additional features useful for sites of any size, especially busier sites. I use PHP-FPM in this tutorial instead of Lighttpd's spawn-fcgi.

Installing Apache2 With PHP5 And MySQL Support On OpenSUSE 13.1 (LAMP)
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Installing Apache2 With PHP5 And MySQL Support On OpenSUSE 13.1 (LAMP)

LAMP is short for Linux, Apache, MySQL, PHP. This tutorial shows how you can install an Apache2 webserver on an OpenSUSE 13.1 server with PHP5 support (mod_php) and MySQL support.

Using Percona Server 5.6 with the Docker open-source engine
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There are a couple of posts about setting up Percona XtraDB Cluster on Vagrant and Percona Server on MySQL Sandbox – those are two of the top tools used by the Percona Support team for testing and bug processing among other things.

In this post, however, I will show you how to use Docker with Percona Server on Ubuntu 12.04.

As per Docker’s official site:

Docker is an open-source engine that automates the deployment of any application as a lightweight, portable, self-sufficient container that will run virtually

  [Read more...]
The Perfect Server - OpenSUSE 13.1 x86_64 (Apache2, MySQL, PHP, Postfix, Dovecot and ISPConfig 3)
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The Perfect Server - OpenSUSE 13.1 x86_64 (Apache2, Dovecot, ISPConfig 3)

This is a detailed description about how to set up an OpenSUSE 13.1 64bit (x86_64) server that offers all services needed by ISPs and hosters: Apache web server (SSL-capable) with PHP, CGI and SSI support, Postfix mail server with SMTP-AUTH, TLS and virtual mail users, BIND DNS server, Pureftpd FTP server, MySQL server, Dovecot POP3/IMAP, Quota, Firewall, Mailman, etc. Since version 3.0.4, ISPConfig comes with full support for the nginx web server in addition to Apache; this tutorial covers the setup of a server that uses Apache, not nginx.

Installing Nginx With PHP5 (And PHP-FPM) And MySQL Support (LEMP) On Ubuntu 14.04 LTS
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Installing Nginx With PHP5 (And PHP-FPM) And MySQL Support (LEMP) On Ubuntu 14.04 LTS

Nginx (pronounced "engine x") is a free, open-source, high-performance HTTP server. Nginx is known for its stability, rich feature set, simple configuration, and low resource consumption. This tutorial shows how you can install Nginx on an Ubuntu 14.04 server with PHP5 support (through PHP-FPM) and MySQL support (LEMP = Linux + nginx (pronounced "engine x") + MySQL + PHP) .

GUUG Frühjahrsfachgespräch 2014: CfP ends on May 31st!
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The German Unix User Group (GUUG) will hold their annual conference "Frühjahrsfachgespräch" on September 23-26 this year (I know, not really "Frühjahr" anymore, but this is how it is).

The Call for Presentations is still open until May 31st. Talks can be proposed in German and English, and there are slots for longer tutorials as well.

The range of possible topics is broad, so if you think you have anything interesting to share with a very passionate and technical audience of sysadmins and developers, here are some suggestions:

  • Operating Systems/Applications: architectures, privilege concepts, new developments, administration, mobile systems
  • Relevant new OS Kernel
  [Read more...]
The Perfect Server - Ubuntu 14.04 (nginx, BIND, MySQL, PHP, Postfix, Dovecot and ISPConfig 3)
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The Perfect Server - Ubuntu 14.04 (nginx, BIND, MySQL, PHP, Postfix, Dovecot and ISPConfig 3)

This tutorial shows how to prepare an Ubuntu 14.04 (Trusty Tahr) server (with nginx, BIND, Dovecot) for the installation of ISPConfig 3, and how to install ISPConfig 3. ISPConfig 3 is a webhosting control panel that allows you to configure the following services through a web browser: Apache or nginx web server, Postfix mail server, Courier or Dovecot IMAP/POP3 server, MySQL, BIND or MyDNS nameserver, PureFTPd, SpamAssassin, ClamAV, and many more. This setup covers nginx (instead of Apache), BIND (instead of MyDNS), and Dovecot (instead of Courier).

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Ubuntu 14.04LTS)
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Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Ubuntu 14.04LTS)

This document describes how to install a Postfix mail server that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses.

The Perfect Server - CentOS 6.5 x86_64 (Apache2, MySQL, PHP, PureFTPD, Postfix, Dovecot and ISPConfig 3)
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The Perfect Server - CentOS 6.5 x86_64 (Apache2, Dovecot, ISPConfig 3)

This tutorial shows how to prepare a CentOS 6.5 x86_64 server for the installation of ISPConfig 3, and how to install ISPConfig 3. ISPConfig 3 is a webhosting control panel that allows you to configure the following services through a web browser: Apache web server, Postfix mail server, MySQL, BIND nameserver, PureFTPd, SpamAssassin, ClamAV, Mailman, and many more. Since version 3.0.4, ISPConfig comes with full support for the nginx web server in addition to Apache; this tutorial covers the setup of a server that uses Apache, not nginx.

Revisiting ZFS and MySQL
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While at Percona Live this year I was reminded about ZFS and running MySQL on top of a ZFS-based storage platform.

Now I’m a big fan of ZFS (although sadly I don’t get to use it as much as I used to after I shutdown my home server farm), and I did a lot of different testing back while at MySQL to ensure that MySQL, InnoDB and ZFS worked correctly together.

Of course today we have a completely new range of ZFS compatible environments, not least of which are FreeBSD and ZFS on Linux, I think it’s time to revisit some of my original advice on using this combination.

Unfortunately the presentations and MySQL University sessions back then have all been taken down. But that doesn’t mean the advice is any less valid.

Some of the core advice for using InnoDB on ZFS:

  • Configure a single InnoDB tablespace,
  [Read more...]
A/UX, NeXTSTEP, & OS X
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One thing that gets tedious in the IT community and Oracle community is the penchant for Windows only solutions. While Microsoft does an excellent job in certain domains, I remain a loyal Apple customer. By the way, you can install Oracle Client software on Mac OS X and run SQL Developer against any Oracle Database server. You can even run MySQL Workbench and MySQL server natively on the Mac OS X platform, which creates a robust development platform and gives you more testing options with the MySQL monitor (the client software).

Notwithstanding, some Windows users appear to malign Apple and the Mac OS X on compatibility, but they don’t understand that it’s a derivative of the

  [Read more...]
Ubuntu 14.04 LTS first impressions
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The Trusty Tahr is out with support for 5 years. Here are the first thoughts about it…

Stupid Browser comes up when searching “Appearance”
  • Unity feels more responsive than ever, especially the Alt+Tab.
  • New Desktop environments these days (also read as Cinnamon, GNOME Shell) take up a lot of RAM, I wanted to test 14.04′s unity, after few hours usage it too scooped up 320 MB worth of RAM… I expected better
  • One thing that definitely annoyed me a lot
  [Read more...]
Amazon EC2 Linux AMIs
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If you use Amazon Elastic Compute Cloud (EC2), you are always given choices of AMIs (by default; there are plenty of other AMIs available for your base-os): Amazon Linux AMI, Red Hat Enterprise Linux, SUSE Enterprise Server and Ubuntu. In terms of cost, the Amazon Linux AMI is the cheapest, followed by SUSE then RHEL. 

I use EC2 a lot for testing, and recently had to pay a “RHEL tax” as I needed to run a RHEL environment. For most uses I’m sure you can be satisfied by the Amazon Linux AMI. The last numbers suggest Amazon Linux is #2 in terms of usage on EC2.

Anyway, recently Amazon Linux AMI came out with the 2014.03 release (see release

  [Read more...]
Compile at CentOS 6.5 the new MySQL webscalesql-5.6.17 branch by Facebook, Google, LinkedIn, and Twitter
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http://webscalesql.org/

yeah , big buzz around that one :)

So I decided to check the install process:

1. Clone the repo from

root@webscalesql-5.6.clean:[Mon Mar 31 11:37:11][~]$ cd /opt/
root@webscalesql-5.6.clean:[Mon Mar 31 11:37:15][/opt]$ mkdir installs
root@webscalesql-5.6.clean:[Mon Mar 31 11:37:17][/opt]$ cd installs/
root@webscalesql-5.6.clean:[Mon Mar 31 11:37:19][/opt/installs]$ git clone https://github.com/webscalesql/webscalesql-5.6.git
Initialized empty Git repository in /opt/installs/webscalesql-5.6/.git/
remote: Counting objects: 30397, done.
remote: Compressing objects: 100% (12678/12678), done.
remote: Total 30397 (delta 18716), reused
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Install MySQL fork MariaDB 10.0.9 on CentOS release 6.5 with server_audit-1.1.5 and oqgraph-engine
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I needed to test the new server audit plug-in on latest MariaDB 10.0.9
More info about that handy plug in you may find here : http://www.skysql.com/downloads/mariadb-audit-plugin
Take a moment to read the info, along with that nice blog : http://www.skysql.com/blogs/ralf-gebhardt/activating-auditing-mariadb-and-mysql-5-minutes

In short:

root@mariadb-10.0.9:[Mon Mar 24 07:51:54][/tmp/]$ lftp http://ftp.igh.cnrs.fr/pub/mariadb/mariadb-10.0.9/yum/
cd ok, cwd=/pub/mariadb/mariadb-10.0.9/yum                                   
lftp ftp.igh.cnrs.fr:/pub/mariadb/mariadb-10.0.9/yum> bookmark add mariadb-10.0.9
lftp


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dpkg: dependency problems prevent configuration of mysql-workbench-community for Ubuntu 13.04
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While installing mysql-workbench-community-6.0.9 on Ubuntu 13.04 if you get below error. root@Dell-XPS:/home/nilnandan/Downloads# dpkg -i mysql-workbench-community-6.0.9-1ubu1204-amd64.deb Selecting previously unselected package mysql-workbench-community. (Reading database … 203112 files and directories currently installed.) Unpacking mysql-workbench-community (from mysql-workbench-community-6.0.9-1ubu1204-amd64.deb) … dpkg: dependency problems prevent configuration of Continue reading →   [Read more...]
We're hiring!
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Continuent, a leading provider of database clustering and replication software has five (5) new positions open: Build/Test Engineer Senior Database Availability and Clustering Engineer Senior Database Replication Engineer Data Replication Sales Engineer Clustering and Replication Test Development Engineer If you want to get in on the ground floor of a growing company in a challenging field
The joy of Unicode
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So, back in late 2008, rather soon after we got to start working on Drizzle full time, someone discovered unicodesnowmanforyou.com, or:

Since we had decided that Drizzle was going to be UTF-8 everywhere,(after seeing for years how hard it was for people to get character sets correct in MySQL) we soon added ☃.test to the tree, which tried a few interesting things:

CREATE TABLE ☃; CREATE DATABASE ☃; etc etc

Because what better to show off UTF-8 than using odd Unicode characters for table names, database names and file names. Well… it turns out we were all good except if you attempted to check out the source tree on Solaris. It was some combination of Python, Bazaar and Solaris that meant you


  [Read more...]
Why buffered writes are sometimes stalled
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 Many people think buffered write (write()/pwrite()) is fast because it does not do disk access. But this is not always true. Buffered write sometimes does disk access by itself, or waits for some disk accesses by other threads. Here are three common cases where write() takes longer time (== causing stalls).

1. Read Modify Write

Suppose the following logic. Opening aaa.dat without O_DIRECT/O_SYNC, writing 1000 bytes sequentially for 100,000 times, then flushing by fsync().

fd=open("aaa.dat", O_WRONLY);
for(i=0; i< 100000; i++) {
write(fd, buf, 1000);
}
fsync(fd);
 You might think each write() will finish fast enough (at least less than 0.1ms) because it shouldn't do any disk access. But it is not always true.
 Operating System manages I/O by page. It's 4KB








  [Read more...]
Open Source Enigma Project
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The wild and crazy guys over at S&T Geotronics, James Sanderson and Marc Tessier, have decided to go full tilt with a Kickstarter version of their DIY Open Enigma Project.  For those who missed the fanfare last year, they were featured on Instructables showing how to build an Arduino-based encryption machine that works exactly like a WWII era Enigma.  You know, the thing that

  [Read more...]
Sandboxed MySQL Utilities – HowTo
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Often I would need to work on customer servers where MySQL Utilities would be a really good fit for the tools I need. However, I would not want to mess around with the customer servers just to have it running so I would have the tools built and sandboxed on its own directory where I can cleanup later. Here’s how:

cd ~
wget http://mysql.mirrors.hoobly.com/Downloads/MySQLGUITools/mysql-utilities-1.4.1.tar.gz
tar xzf mysql-utilities-1.4.1.tar.gz
cd mysql-utilities-1.4.1
python setup.py build
python setup.py install --root=/home/revin/mysql-utilities-1.4.1
export PYTHONPATH=.:/home/revin/mysql-utilities-1.4.1/usr/lib/python2.6/site-packages
/home/revin/mysql-utilities-1.4.1/usr/bin/mysqlfrm --help

Your source of the package and install directory may vary – enjoy!

Mac Mini to the rescue
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In teaching, I had a problem because my students have different base operating systems, like Windows 7, Windows 8, Linux, and Mac OS X. I needed a teaching and lecture platform that would let me teach it all (not to mention support their environments). That meant it had to virtualize any of the following with a portable device:

  • Windows 7 or 8 hosting natively an Oracle Database 11g XE, 11g, or 12c and MySQL Database 5.6
  • Windows 7 or 8 hosting a Fedora or Oracle Unbreakable Linux VM (3 or 4 GB) with Oracle Database 11g XE, 11g, or 12c and MySQL Database 5.6
  • Mac OS X hosting a Fedora or Oracle Unbreakable Linux VM (3 or 4 GB) with Oracle Database 11g XE,
  [Read more...]
and now for something completely different…
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As many of you know, I’ve been working in the MySQL (http://www.mysql.com) world for quite a while now. IN fact, it was nearly 10 years ago when I first started hacking on MySQL Cluster (https://www.mysql.com/products/cluster/) at MySQL AB.

Most recently, I was at Percona which was a wonderful journey where over my nearly three years there the company at least doubled in size, launched several new software products and greatly improved the quality and frequency of releases.

However the time has come for something

  [Read more...]
Showing entries 1 to 30 of 1132 Next 30 Older Entries

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