Archive for January, 2012

Dumping/Backing up Mysql Databases (Innodb) without locking tables.

Jan 27 2012 Published by under Mysql

When not using hosted backup solutions or gems, I am make use good old “mysqldump” a lot to take a dump of my databases and move the sql around. I think its good practice generally to avoid locking tables for read and write atleast in a production like environment. I am yet to go deeper into this issue, but as a practice I have started using  the options almost all the time.

So in case of Transactional Tables ( Innodb ) , you can use the 

–single-transaction

option. What this option does is that it opens a new transaction which in turn avoids locking. The database is available to read and write in that time, though you may see a considerable loss in performance. 

Another useful option is 

–quick

This option is useful for dumping large tables. It forces mysqldump to retrieve rows for a table from the server a row at a time rather than retrieving the entire row set and buffering it in memory before writing it out.

Checkout more details about mysqldump here

I have also heard good things about Percona XtraBackup for Mysql. I am yet to explore that option. 

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Surprising Yourself!!

Jan 24 2012 Published by under Uncategorized

With every strip my goals is to surprise myself. If I’m not surprised, the reader surely won’t be either. The surprises are usually fairly small, so it’s a real delight when an idea pops in from Pluto.

by Bill Waterson

I was reading Calvin and Hobbes recently and came across this foot note. 

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Team Dinner

Jan 03 2012 Published by under Uncategorized


Taken at Hotel Taj Krishna

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