# Some info about ib\_logfile0 and ib\_logfile1 **URL:** \ **Category:** Percona XtraBackup\ **Created:** [July 24, 2014, 4:15am UTC](https://forums.percona.com/t/some-info-about-ib-logfile0-and-ib-logfile1/3637 "2014-07-24T04:15:31Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Andro](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Andro](https://forums.percona.com/u/Andro)\ **Post date:** [July 24, 2014, 4:15am UTC](https://forums.percona.com/t/some-info-about-ib-logfile0-and-ib-logfile1/3637/1 "2014-07-24T04:15:31Z")
Hello everyone, I’m new to this backup and sorry if the question is dumb. After executing the backup command: innobackupex --user=xxxx --password=xxxxxxx /var/lib/mysql\_backup it ended up with: innobackupex: completed OK! so far so good, but i looked at the folder’s size and it was 355 MB , but earlier backups are 4,1 GB. When i opened them they had these two files: ib\_logfile0 and ib\_logfile1, which are missing in the new backup folder. Can you explain me what are these and why are they missing in the new backup folder? ---
**Author:** ![alaincraven](https://avatars.discourse-cdn.com/v4/letter/a/edb3f5/32.png) [@alaincraven](https://forums.percona.com/u/alaincraven)\ **Post date:** [July 29, 2014, 5:53am UTC](https://forums.percona.com/t/some-info-about-ib-logfile0-and-ib-logfile1/3637/2 "2014-07-29T05:53:01Z")
The log files will be missing until you prepare the backup. The size still seems very small - do you have very large log files? ---
**Author:** ![Andro](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Andro](https://forums.percona.com/u/Andro)\ **Post date:** [July 29, 2014, 7:45am UTC](https://forums.percona.com/t/some-info-about-ib-logfile0-and-ib-logfile1/3637/3 "2014-07-29T07:45:09Z")
This is what’s in the folder of the previous backup that was created: 4.0K backup-my.cnf 58M ibdata1 2.1G ib\_logfile0 2.1G ib\_logfile1 1.0M mysql 212K performance\_schema 7.1M radius 27M xbench 4.0K xtrabackup\_binary 4.0K xtrabackup\_binlog\_pos\_innodb 4.0K xtrabackup\_checkpoints 2.0M xtrabackup\_logfile And this is the latest: 4.0K backup-my.cnf 59M ibdata1 1.1M mysql 212K performance\_schema 260M radius 3.7M radmin 26M xbench 4.0K xtrabackup\_binary 4.0K xtrabackup\_checkpoints 7.3M xtrabackup\_logfile So the missing files are ib\_logfile0, ib\_logfile1 and xtrabackup\_binlog\_pos\_innodb. By logfiles, which logs do you mean exactly? So after preparing the backup i’ll have ib\_logfiles? But what about xtrabackup\_binlog\_pos\_innodb? In the history command I can’t find how the previous backup was created. It was over a year ago and there is no one working here from that period to ask them. ---
**Author:** ![scott.nemes](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/scott.nemes/32/5_2.png) [@scott.nemes](https://forums.percona.com/u/scott.nemes)\ **Post date:** [July 29, 2014, 3:11pm UTC](https://forums.percona.com/t/some-info-about-ib-logfile0-and-ib-logfile1/3637/4 "2014-07-29T15:11:05Z")
Percona has an easy to follow guide on taking, preparing, and restoring a full backup: [url][Percona XtraBackup](http://www.percona.com/doc/percona-xtrabackup/2.2/howtos/recipes_ibkx_local.html%5B/url%5D) The files you are missing will be created once you run the apply-log step to prepare the backup prior to restore. ---
**Author:** ![Andro](https://avatars.discourse-cdn.com/v4/letter/a/a587f6/32.png) [@Andro](https://forums.percona.com/u/Andro)\ **Post date:** [July 30, 2014, 1:21am UTC](https://forums.percona.com/t/some-info-about-ib-logfile0-and-ib-logfile1/3637/5 "2014-07-30T01:21:58Z")
I followed the guide, but it says nothing about these ib\_logfiles or I’ve missed it. Anyway, I understood when and how they are created. Thank you for the help. ---
**Author:** ![scott.nemes](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/scott.nemes/32/5_2.png) [@scott.nemes](https://forums.percona.com/u/scott.nemes)\ **Post date:** [July 30, 2014, 11:30am UTC](https://forums.percona.com/t/some-info-about-ib-logfile0-and-ib-logfile1/3637/6 "2014-07-30T11:30:34Z")
The guide is really just meant to show you how to create, prepare,and restore a backup with as little detail / complication as possible to get you going. If you are curious for more details, there is a ton of extra information in the Xtrabackup/Innobackupex documentation you could spend all day reading if interested. But that might put you to sleep at some point. 😉