Comments on: xtrabackup-0.5, bugfixes, incremental backup introduction

By: Leon

Leon — Fri, 10 Apr 2009 09:19:27 +0000

Actually I see incremental is not supported in innobackupex , do you know when this is available?
For now I guess I need to backup triggers/user accounts myself and use xtrabackup to get the data.
How would the prepare work using xtrabackup with the above example?

Would I copy all my backup data onto a new server at /data and issue this?

xtrabackup –prepare –datadir=/data

Then how would incrementals work lets say the incremental is at /data/backup/02 would this command be correct usage?

xtrabackup –prepare –datadir=/data –incremental-dir=/data/backup/02

By: Leon

Leon — Fri, 10 Apr 2009 09:09:22 +0000

Hi,
Thanks for the response I am using InnoDB. I have actually just been using xtrabackup at this point to create backups. As I am doing incremental backups I didn’t think compression was supported yet.

Is it ok to use the xtrabackup command to backup and innobackupex to restore?

The above prepare looks pretty easy, how would increments be added after the main backup?

Thanks again

Leon

By: Vadim

Vadim — Thu, 09 Apr 2009 21:50:58 +0000

Leon,

To restore data you can copy backup to final /data directory directly and run
innobackupex –apply-log /data
it should execute prepare and create iblogs ready to use, that is MySQL will be ready to start.

As for trigger/user it depends what tool you use.
xtrabackup binary works only with innodb tables.
innobackupex handles all instance including MyISAM, user accounts, triggers, views etc.

As for compression you can use it already in stream mode, i.e.
innobackupex –stream=tar tmp | gzip – > backup.tar.gz.

Are you looking for different compression way ?

By: Leon

Leon — Thu, 09 Apr 2009 19:58:36 +0000

Well I am very impressed so far. I have mounted a remote drive using fuse and ssfhs and incrementally backing up straight to that which is working great. Not using it in production yet as need to test the restores.

I have a couple of questions if you could possibly answer, as I can’t seem to make sense of the documents.

When doing a –prepare, lets say the current database server has died, we can first download our backup to a new server on /data/backup we then want to restore the data to /data what would the prepare command look like?

Also are triggers /user accounts backed up or is it just data and schema?

Thanks very much I am honestly very impressed with it and looking forward to compression etc in future releases

By: Vadim

Vadim — Thu, 09 Apr 2009 19:43:18 +0000

leon,

yes, that’s right xtrabackup can read last lsn by itself without additional scripting

By: leon

leon — Thu, 09 Apr 2009 13:53:08 +0000

Great stuff! Just testing this. From the doucmentation it seems to show a different use case for incremental.

It states you just pass the last increments directory in as –incremental-basedir= and the backup process should read the lsn from the checkfile in this last increment directory. I’ve tested that and it seems to work. This suggests we just need to know the path to our last increment and pass this in each time we increment and we don’t actually need to script the reading of the incremental_lsn.

Have I understood this correctly?

Thanks again
Leon