Posts Tagged ‘innodb’

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Awesome to see the MySQL Ecosystem Flourishing

Saturday, March 30th, 2013

I just wanted to take a moment and thank, notice, what ever you want to call it, but share some love with all those and all things MySQL.

I read the post Let’s Celebrate MySQL 5.6 GA! – MySQL Community Reception by Oracle by Oracle MySQL Group and it got me to thinking of how proud I am of (and proud to be a part of) the whole MySQL Ecosystem.

We *should* all celebrate MySQL 5.6 GA! I well remember the 3.22 and 3.23 days, and there were many folks before me already using MySQL!!!

I love to see how it has continued to grow, the ecosystem and all things MySQL, that is. MySQL is better than ever. MariaDB is better than ever. Percona Server is better than ever. You have great Support options with MySQL/Oracle, SkySQL/MariaDB, and Percona as well – not to mention numerous others. I just love the fact that everyone is flourishing, and improving, and the technology continues to advance and most importantly, everyone is working together to provide a great software and service to all MySQL/MariaDB/InnoDB/XtraDB/etc-related users out there.

Not to mention the monitoring softwares, the various plugins and connectors, the numerous storage engines, the number of 3rd party apps & helpful scripts, User Conferences, local meet-ups, books, tutorials, the number of Community bloggers who freely and spiritedly share their knowledge, time, advice, ideas, concerns, and so on. It’s just a great Community to be a part of, and I’m thrilled to see how it’s grown, and continues to grow over the years. And that’s just a testament of the quality of all you great people out there involved and helping. :)

I won’t get too mushy, but it is great to see the MySQL Ecosystem and all of those in it flourish, and may it continue for many, many years to come! :)

Big thanks to everyone out there contributing! “It takes a village, and we are that village”, as my wife always says. :)

 

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How to Build MariaDB 10.0 on Windows from Source Code

Tuesday, March 26th, 2013

I just wanted to share my steps for building MariaDB 10.0 on Windows (10.0.1 in this case):

cd maria-10.0.1
mkdir bld
cd bld
cmake .. -G "Visual Studio 10"
cmake --build . --config relwithdebinfo --target package

That’s it! The zip file is created right there in bld/.

Hope this helps. :)

Related Build Links:

 

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Posted in MySQL, SkySQL | 1 Comment »

Enabling the Verbose InnoDB Lock Monitor in MariaDB and Percona Server for XtraDB+ and XtraDB

Monday, March 25th, 2013

I enabled the InnoDB Lock Monitor in my MariaDB 5.5 instance (using XtraDB+ as the InnoDB – which is the default in MariaDB) and noticed that while the SHOW ENGINE INNODB STATUS was being logged to the error log, it wasn’t logging the “additional” lock information – it just looked like the plain ‘ole INNODB STATUS.

Long story short, Percona added a new variable so one has better control over what gets logged:

innodb_show_verbose_locks

If off (default), then the InnoDB Lock Monitor logs the normal INNODB STATUS, and if enabled, then it logs it with the extended lock information.

They also created another variable that goes along with this one (and the InnoDB Lock Monitor), which is:

innodb_show_locks_held

This variable indicates the number of locks to print that are held for each InnoDB transaction (the default is 10, max is 1000).

For reference, these 2 options are discussed further in Percona’s manual.

Hope this helps. :)

 

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Formatting SHOW ENGINE INNODB STATUS outputs when “\n” are embedded as Text

Wednesday, May 30th, 2012

Lately I’ve received a number of SHOW ENGINE INNODB STATUS outputs with embedded “\n” characters appearing as text, but not true line breaks.

Of course this makes reading a long, INNODB STATUS nearly impossible.

With Linux, you can more easily fix this using sed or awk (or if you have those on Windows w/ gnu or cygwin or the like).

I didn’t have either handy, nor a fancy editor (just using WordPad), but I did have a hex editor handy (necessary for such cases as this).

In the hex editor (I use Freeware Hex Editor XVI32 for Windows), fixing this took about 2 seconds.

I just replaced:

5C6E <-- which is the text "\n"

with:

0D0A <-- which is the true carriage return/newline

I realize this is a rather specific issue, but in case you run into it, here is an easy fix.

Hope this helps, and happy INNODB STATUS parsing. :)

 

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How to Enable the Original InnoDB Plugin in MariaDB 5.5

Friday, May 25th, 2012

As I mentioned here, there is a slight change for enabling the [original] InnoDB Plugin in MariaDB 5.5 (as compared to how you would enable it in 5.1).

Remember, in MariaDB 5.5, if you do not “enable” (i.e., add anything to the config file to do so) the InnoDB Plugin in MariaDB 5.5, you’ll end up with XtraDB+ for your InnoDb plugin. However, if you do “enable” the InnoDB plugin, then you end up with the original InnoDB plugin provided by Oracle/InnoDB.

The change is that the plugin file (.dll for Windows, .so file for Linux) which was previously named “ha_innodb_plugin.dll” is now just “ha_innodb.dll”.

Thus, if you previously enabled the plugin with (would have been in a 5.1 instance):

[mysqld]
ignore_builtin_innodb
plugin-load=innodb=ha_innodb_plugin.dll;innodb_trx=ha_innodb_plugin.dll;
innodb_locks=ha_innodb_plugin.dll;innodb_lock_waits=ha_innodb_plugin.dll;
innodb_cmp=ha_innodb_plugin.dll;innodb_cmp_reset=ha_innodb_plugin.dll;
innodb_cmpmem=ha_innodb_plugin.dll;innodb_cmpmem_reset=ha_innodb_plugin.dll

You now need to use:

[mysqld]
ignore_builtin_innodb
plugin-load=innodb=ha_innodb.dll;innodb_trx=ha_innodb.dll;
innodb_locks=ha_innodb.dll;innodb_lock_waits=ha_innodb.dll;
innodb_cmp=ha_innodb.dll;innodb_cmp_reset=ha_innodb.dll;
innodb_cmpmem=ha_innodb.dll;innodb_cmpmem_reset=ha_innodb.dll

That is the only difference, so after making that change, just restart your instance, and you’ll be in business.

For reference, if you encounter this, you might see an error similar to the following in your error log:

120524 19:24:56 [ERROR] Can't open shared library
 'C:\Program Files\MySQL\MariaDB 5.5\lib\plugin\ha_innodb.dll'
 (errno: 0 The specified module could not be found.)
120524 19:24:56 [ERROR] Couldn't load plugin named 'innodb' with
 soname 'ha_innodb.dll'.
120524 19:24:56 [ERROR] C:/Program Files/MySQL/MariaDB 5.5/bin/mysqld:
 unknown variable 'innodb_buffer_pool_size=10M'
120524 19:24:56 [ERROR] Aborting

Hope this helps.

 

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How to Build MariaDB 5.5 on Windows from Source Code

Friday, May 25th, 2012

I built MariaDB 5.5.24 on Windows yesterday from source, so I just wanted to share my steps.

Here is the short version:

bzr branch lp:maria/5.5 maria-5.5
cd maria-5.5
mkdir bld
cd bld
cmake .. -G "Visual Studio 10"
cmake --build . --config relwithdebinfo --target package

Done! Nice, neat zip file is created right there.

Here is the longer version with outputs for those interested:

C:\mariadb-5.5>bzr branch lp:maria/5.5 maria-5.5
Connected (version 2.0, client Twisted)
Authentication (publickey) successful!
Secsh channel 1 opened.
Branched 3418 revision(s).

C:\mariadb-5.5>cd maria-5.5

C:\mariadb-5.5\maria-5.5>mkdir bld

C:\mariadb-5.5\maria-5.5>cd bld

C:\mariadb-5.5\maria-5.5\bld>cmake .. -G "Visual Studio 10"
-- Check for working C compiler using: Visual Studio 10
-- Check for working C compiler using: Visual Studio 10 -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler using: Visual Studio 10
-- Check for working CXX compiler using: Visual Studio 10 -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- MariaDB 5.5.24
-- Check size of void *
-- Check size of void * - done
-- Packaging as: mariadb-5.5.24-win32
-- Looking for include files CMAKE_HAVE_PTHREAD_H
-- Looking for include files CMAKE_HAVE_PTHREAD_H - not found.
-- Found Threads: TRUE
-- Looking for pthread_attr_getguardsize
-- Looking for pthread_attr_getguardsize - not found
-- Check size of time_t
-- Check size of time_t - done
-- Could NOT find Boost
-- Cannot find wix 3, installer project will not be generated
-- Looking for MFC
-- Looking for MFC - not found
-- Configuring done
-- Generating done
-- Build files have been written to: C:/mariadb-5.5/maria-5.5/bld

C:\mariadb-5.5\maria-5.5\bld>cmake --build . --config relwithdebinfo --target package
.......
lots of output
.......
C:\mariadb-5.5\maria-5.5\bld\...
C:\mariadb-5.5\maria-5.5\bld\...
C:\mariadb-5.5\maria-5.5\bld\...

    46 Warning(s)
    0 Error(s)

Time Elapsed 00:23:18.16

Success \o/

Package is named: mariadb-5.5.24-win32.zip

Full location:

C:\mariadb-5.5\maria-5.5\bld\mariadb-5.5.24-win32.zip

C:\Users\Chris>mysql -uroot -pmysql -P3313 -e"select version()"
+----------------+
| version()      |
+----------------+
| 5.5.24-MariaDB |
+----------------+

With XtraDB+ (i.e., InnoDB plugin is not enabled), it starts fine, and uses InnoDB version 1.1.8-24.1.

If you try to enable the original InnoDB plugin, note the library is now named ha_innodb.dll (or ha_innodb.so) instead of ha_innodb_plugin.dll (or ha_innodb_plugin.so), which is what it was named in MySQL/MariaDB 5.1. I discuss this topic in more detail here, if you’re interested.

Hope this helps.

Further resources:

Full Details on CMake here:

http://forge.mysql.com/wiki/CMake

For details on building on Linux, please see here:

http://kb.askmonty.org/en/source-building-mariadb-on-centos/
..
 

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With InnoDB’s Transportable Tablespaces, Recovering Data from Stranded .ibd Files is a Thing of the Past

Thursday, April 26th, 2012

Being a data recovery specialist and having recovered countless GBs of corrupted, and/or stranded, InnoDB data in my days, I am very happy to hear about the new InnoDB Transportable Tablespaces coming in MySQL 5.6!

Back in the day, if you had a stranded .ibd file (the individual InnoDB data file with –innodb-file-per-table option), you basically had nothing (even though that file contained all of the data). This was because unless you had the original instance that that particular .ibd file (table) originated from, there was no way to load it, import, or dump from it. So it was not of much use, though all the data was *right* there.

Thus I created the method of Recovering an InnoDB table from only an .ibd file (I should note that this was before the InnoDB Recovery Tool had been released, which can also be used to recover data from a stranded .ibd file too).

However, if you’ve used either my method or the InnoDB Recovery Tool for such a job, it can be a bit of work to get the data dumped. For those experienced, it goes much faster. But still, you cannot get any faster than just being able to (roughly) import the individual tablespace right into any running MySQL 5.6 instance. :)

Nice work! :)

Note: Again, I must mention this is only in MySQL 5.6, so if you have a stranded .ibd file you need to recover data from pre-5.6, you’ll either need to use my method or the InnoDB Recovery Tool.

 

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Create MariaDB Windows Service

Thursday, April 19th, 2012

I’d had some difficulty manually creating my own windows service for MariaDB (worked fine from the installer), but it was due to the way I was creating it, so I wanted to share the proper approach:

Old Way:

sc create "maria55" binpath= "\"C:/Program Files/MySQL/MariaDB 5.5/bin/mysqld\"
\"--defaults-file=C:/Program Files/MySQL/MariaDB 5.5/data/my.ini\""
DisplayName= "Maria55" start= "auto"

New Way:

sc create "maria55" binpath= "\"C:/Program Files/MySQL/MariaDB 5.5/bin/mysqld\"
\"--defaults-file=C:/Program Files/MySQL/MariaDB 5.5/data/my.ini\" maria55"
DisplayName= "Maria55" start= "auto"

The key is adding the name, maria55, after the –defaults-file=.. option, but still within the “” that belong to “binpath”.

This extra parameter exists so that mysqld knows whether or not it was started as a service or not.

Without it, the server does not know, and therefore didn’t realize it was running as a service, and thus since the service manager got no response from mysqld, it terminated the service after 30 seconds (though I could connect and issue any MySQL command or query within that 30 seconds).

Many thanks to Wlad for helping me to track this down!

For reference, here is my terminal output:

C:\>sc create "maria55" binpath= "\"C:/Program Files/MySQL/MariaDB 5.5/bin/mysqld\"
\"--defaults-file=C:/Program Files/MySQL/MariaDB 5.5/data/my.ini\" maria55"
DisplayName= "Maria55" start= "auto"
[SC] CreateService SUCCESS

C:\Users\Chris>net start maria55
The maria55 service is starting.
The maria55 service was started successfully.

With the initial service attempt, the service creates fine, but fails after 30 seconds:

C:\Users\Chris>net start maria55
The service is not responding to the control function.

More help is available by typing NET HELPMSG 2186.

Hope this helps.

 

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Posted in MySQL, SkySQL | 2 Comments »

Congratulations to all of the 2012 Community Contributor Award Winners!

Wednesday, April 18th, 2012

I just wanted to take a moment and say congratulations to all of the 2012 Community Contributor Award Winners!

The usual suspects, Baron, Sarah, Gerardo, and Sheeri, each won, and deservedly so. All 4 contribute a great deal to the MySQL Community and ecosystem, and it is very much appreciated. :)

However, I was especially happy to hear that James Day was also a winner (a name everyone might not be so familiar with). But, having worked with James for 5 years, I really couldn’t say it better than Henrik Ingo already did (in his initial post of this year’s winners), so let me quote him:

“James was nominated for ‘MySQL advocacy and swimming upstream to keep people informed about bugs and other issues.’ When looking into James’ activities in the community, the panel first didn’t find much evidence to support an award. For instance, unlike most winners, he is not a frequent blogger on Planet MySQL. But when digging deeper it became clear that James’ instead is a very active commenter on everyone else’s blogs, contributing in depth additional information to the community dialogue. James therefore is an excellent example of the kind of helpful support person that tirelessly helps everyone he meets in their use of MySQL.”

There is not a single bug comment from James that I don’t appreciate, and he gladly shares his in-depth knowledge, and always has.

So this was definitely great to see, and that award, as were all, were well deserved!

Congratulations, James, Baron, Sarah, Gerardo, and Sheeri!

 

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SkySQL Raises $4 Million in Series A Round Funding

Wednesday, April 18th, 2012

I am very pleased to say that earlier today, SkySQL announced it has raised $4 Million in Series A Round Funding.

Let me post the main part of the press release here:

SAN JOSE – April 18, 2012 – SkySQL, the first choice in affordable database solutions for the MySQL® and MariaDB® databases in the enterprise and the cloud, today announces that the company has raised $4 million in Series A funding from a number of investors, including OnCorps, an elite peer-based community of veteran technology investors and advisors committed to bringing better, cost-disruptive technologies into the mainstream. Also funding the round are European investors including Finnish Industry Investment Ltd., Spintop Ventures and Open Ocean Capital.

SkySQL will primarily use the investment to fund growth in its new product development, including adding critical positions. This is the company’s most recent move in expanding beyond a MySQL and MariaDB services-only company into a fully-fledged database products and services provider. SkySQL made its debut in October 2010 and has been funded to date with seed money from OnCorps, as well as Open Ocean Capital. Today, SkySQL is currently operating in 13 countries.

“The SkySQL strategy aligns well with OnCorps’s technology leadership vision,” said Bob Suh of OnCorps. “SkySQL will capitalize on the growing database and cloud services market. We are delighted and look forward to working with the SkySQL team to contribute to their continued success.”

“This investment will let us focus on ramping up development and efforts behind both enterprise and cloud database products that address a very real need in the marketplace,” said Ulf Sandberg, chief executive officer of SkySQL. “We also plan to build on our existing MySQL and MariaDB services offering, which offers customers unrivaled support, consulting and training.”

You can read the full press release here:

http://www.skysql.com/news-and-events/press-releases/skysql-raises-4-million-series-round

Very exciting times! :)

 

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