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Displaying posts with tag: os (reset)
2012 to be year of Linux domination

Previously, I’ve called out years for non-desktop Linux in 2008, Linux in both the low and high-ends of the market in 2009, ‘hidden’ Linux in 2010 and last year, cloud computing in 2011. For 2012, I see continued growth, prevalence, innovation and impact from Linux, thus leading to a 2012 that is dominated by Linux.

I expect to see nothing but continued strength for Linux and …

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Shinguz: MySQL out in the wild

One of our partners recently asked me on what platforms do we usually see MySQL installed out there...

The last 5 years I gave the answer: Typically it is 80% Linux, 10% Windows, 5% Solaris and 5% all others. But this was only the picture of my limited view and I was not sure how objective this was.

This time I really wanted to know it and so I collected the information of about 570 MySQL installations of customers.

The following numbers came out:

Operating System

OS cnt %
Mac OSX 3 0.5%
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Faulty Physical Ram

Some times it's very difficult to find out exact issue. Specially When it's related with hardware. Similar scenario, i faced with a client.

I have been provided with a new box to setup mysql server. After setup mysql along with other application, mysql frequently goes down without any comment in mysql error log file. Spending few days verifying os, logs, mysql and later i found the culprit using memtester tool.

Thanks to memtester tool.

[root@voice ~]# memtester 5 1
memtester version 4.1.2 (32-bit)
Copyright (C) 2009 Charles Cazabon.
Licensed under the GNU General Public License version 2 (only).

pagesize is 4096
pagesizemask is 0xfffff000
want 5MB (5242880 bytes)
got  5MB (5242880 bytes), trying mlock ...locked.
Loop 1/1:
Stuck Address       : ok      
Random Value        : ok
Compare XOR         : ok
Compare SUB         : ok
FAILURE: 0x7888cfc4 != 0xe088cfc4 at offset 0x00039fba.
Compare MUL         : FAILURE: 0x00000001 != …
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mysqldump each object separately

As a continuation to a previous blog post last week and inspired by Kedar I have created a small script to export tables, stored procedures, functions and views into their respective file. It works for multiple databases where you can specify a list of databases too and although things like events, triggers and such are still missing they are easily added.

It is especially useful to dump stored procedures separately since it is a lacking functionality in mysqldump.

I placed the script in mysql forge for anybody to use, provide feedback and possibly enhancements to it.

CAOS Theory Podcast 2010.02.19

Topics for this podcast:

*Jacobsen v. Katzer and open source impact
*Intel, Nokia team up for MeeGo open source OS
*Open source continues in embedded space
*MongoDB and the advent of the NoSQL databases
*Copyrights, complexities, control and conflict

iTunes or direct download (21:48, 6.07 MB)

Automating MySQL access with expect and bash scripting

If you have multiple database servers with strange names, or if you have to hop over multiple machines to connect to any mysql database server, then you know what a pain it can be to administer such a setup. Thanks to some scripting, you can automate such tasks as follows:

Create an expect script:

#!/usr/bin/expect -f
#script by darren cassar

set machine [lindex $argv 0]

set timeout -1

spawn ssh username@$machine
match_max 100000
expect -exact “assword: “
send — “password\r”
send — “sudo -k; sudo su – mysql\r”
expect -exact “sudo -k; sudo su – mysql”
expect -exact “assword:”
send — “password\r”

# you should change the word password in ‘send — “password\r”‘ to your login password
# if you have the same password for each …

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A MySQL is running happily on a machine situated in a land far far away. I grant access to a user@machine_aaaaaa (grant select on db.* to ‘user’@'machine_aaaaa’ identified by ‘password’; flush privileges;), send an email to the user saying it should run fine and happily go off my way. Mistake!

It seems this user can’t connect to the mysql gets access denied:
Access denied for user ‘user’@'machine_bbbbb’ (using password: YES)

Note that the machine the user is being seen from is totally different from the one I set up in the grant!! WHY?

run a reverse lookup on the ip of machine_aaaaa, turns out it shows machine_bbbbb. So I figure a big bad guy messed up /etc/hosts, I was right! `cat /etc/hosts` just to find an entry for machine_aaaaa blehh

Ok, solution is to remove the entry from /etc/hosts (after finding out it wasn’t even necessary and wasn’t even supposed to be there in the first …

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Mac users: MAMP now recommended, not XAMPP

Dear Mac users,

There have been a number of issues with configuring XAMP on the Mac for use with NetBeans IDE, most significantly that XAMP sets the owners of MySQL databases to "nobody", blocking Apache access. Therefore I have changed the Mac OS setup tutorial to use MAMP instead of XAMP. In my opinion, the MAMP setup is more straightforward than the one for XAMP, anyway.

MySQL on i5/OS

i5/OS doesn’t immediately strike you as the most natural environment for running MySQL, but in fact, there some advantages and benefits of making use of the hardware and i5/OS environment. The System i environment used with i5/OS is scalable, and the i5/OS itself provides lots of benefits over the control and separate of work.

Obviously another key advantage is that if you are already using i5/OS for your application, then being able to plug in MySQL into that equation on the same machine makes a big difference. For those companies and organizations that already have a business application on their server, you can use MySQL in combination with ODBC or more direct interfaces such as PHP to provide a web interface to your business application all in the same box.

MySQL works through PASE (Portable Application Solutions Environment) which allows AIX applications to run directly on i5/OS through a direct application binary interface. …

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Is the stack complete now ?

It makes sense. Sun didn't have a Database in their platform stack yet.

They have an OS they should abandon, but they have the hardware and they have appservers, however for a database people needed to go shop elsewhere.
Oracle , IBM and Microsoft also have a pretty complete stack
Others still need to fill the gaps.. Interesting times..

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