Hi,
You can convert the tables themselves semi-online. Just do
set global innodb_file_per_table=1;
and no a no-operation alter on each table with alter table tablename
engine=innodb;
Note that the global variable is just a default, the currently connectd
threads will use the shared tablespace for table data.
You data will be in .ibd files this way, but you can't reclaim space
used by ibdata1 unless you dump and reload your database.
If you don't do the alter just set innodb_file_per_table on the fly,
your new data will be in .ibd files.
These are your options, and the best is indeed dump and reload, there is
no other way to reclaim space from ibdata1, although, there is a way to
convert your tables to use .ibd files.
Peter Boros
On 02/11/2011 06:49 PM, Jan Steinman wrote:
Thanks, Rolando!
It's kind of a scary procedure (dump, drop, reload) that involves significant
down-time, but I guess it's necessary.
On 11 Feb 11, at 10:24, Rolando Edwards wrote:
I wrote an article in www.stackoverflow.com about how to convert absolutely
every InnoDB table to .ibd and permanently shrink the ibdata1 file
http://stackoverflow.com/questions/3927690/howto-clean-a-mysql-innodb-storage-engine/4056261#4056261
Enjoy !!!
Rolando A. Edwards
MySQL DBA (SCMDBA)
155 Avenue of the Americas, Fifth Floor
New York, NY 10013
212-625-5307 (Work)
201-660-3221 (Cell)
AIM& Skype : RolandoLogicWorx
[email protected]
http://www.linkedin.com/in/rolandoedwards
-----Original Message-----
From: Jan Steinman [mailto:[email protected]]
Sent: Friday, February 11, 2011 12:53 PM
To: [email protected]
Subject: Converting INNODB to file-per-table?
Our incremental backups seem to be filling with instances of ib_logfile1,
ib_logfile2, and ibdata1.
I know that changing a single byte in a single INNODB table causes these files to be
"touched."
I put "innodb_file_per_table" in /etc/my.cnf, but apparently, that only causes new
databases to be "file per table," and it is older databases that are being touched in a
minor way daily, causing gigabytes to be backed up needlessly.
Some time ago, someone posted a way to convert existing INNODB tables to "file per
table," but I am unable to find that.
Can someone please post that procedure again?
(I also welcome any "you shouldn't be doing it that way" comments, as long as
they show a better way... :-)
This is for a fairly low-volume server, running on a Mac Mini with two 500GB
disks.
Thanks!
----------------
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the value of your contribution; not just the information that leads to
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:::: Jan Steinman, EcoReality Co-op ::::
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