Comments on: Introducing MySQL Parallel Dump http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/ Stay curious! Fri, 10 May 2013 18:25:19 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: Xaprb http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-14257 Xaprb Thu, 28 Feb 2008 13:12:28 +0000 http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-14257 Hi,

There’s a current forum conversation on the same topic. It would be good to move this there so it’s all in the same place:

http://sourceforge.net/forum/forum.php?thread_id=1952777&forum_id=664350

]]> By: RV http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-14256 RV Thu, 28 Feb 2008 10:02:33 +0000 http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-14256 If you had multiple schema’s, within one MySQL instance, and each one had no dependency/connection to the other, could one not spawn multiple (single-transaction, master-data) mysqldumps against each one and therefore reduce the time to perform full consistent InnoDB hot backups from a master? If not, then I believe this type of tool is only usable for large InnoDB instances on slaves. I know that performing dumps on masters is not recommended, but our replication confidence is low, so at the moment it’s a must. Hopefully that’s where Maatkit will again come to the rescue.

]]> By: Xaprb http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-14254 Xaprb Wed, 27 Feb 2008 15:42:22 +0000 http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-14254 It’s not possible. Locking tables is the only way to do it. A single transaction would require many connections to be able to participate in the transaction, which is something I wouldn’t assume MySQL will build anytime soon :-)

I suppose another way would be to lock tables briefly and allow all child processes to do BEGIN TRANSACTION, but that isn’t the way it’s built at the moment.

]]> By: RV http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-14253 RV Wed, 27 Feb 2008 14:05:43 +0000 http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-14253 Baron,

Great work, but would you mind confirming if this does a consistent snapshot as in single-transaction for mysqldump for InnoDB tables or is this simply not possible via a parallel method?

Cheers

]]> By: Xaprb http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-13448 Xaprb Thu, 04 Oct 2007 02:01:11 +0000 http://www.xaprb.com/blog/2007/09/30/introducing-mysql-parallel-dump/#comment-13448 Just for information, the new version is released, and can do chunked dumps as promised. Testing and benchmarks welcome!

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