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Checking B+tree leaf nodes list consistency in InnoDB
If we have InnoDB pages there are two ways to learn how many records they contain:PAGE_N_RECS field in the page headerCount records while walking over the list of records from infimum to supremumIn...
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How to create a rock-solid MySQL database backup & recovery strategy
Have you ever wondered what could happen if your MySQL database goes down?Although it’s evident such a crash will cause downtime – and surely some business impact in terms of revenue – can you do...
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Percona Live Featured Session with Alibaba Cloud – Flashback: Rolling Back a...
Welcome to another post in the series of Percona Live featured session blogs! In these blogs, we’ll highlight some of the session speakers that will be at this year’s Percona Live conference. We’ll...
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Upcoming Webinar Wednesday August 16: Lock, Stock and Backup – Data Guaranteed
Join Percona’s, Technical Services Manager, Jervin Real as he presents Lock, Stock and Backup: Data Guaranteed on Wednesday, August 16, 2017 at 7:00 am PDT / 10:00 am EDT (UTC-7). Reserve Your Spot...
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Lock, Stock and MySQL Backups: Data Guaranteed Webinar Follow Up Questions
Hello again! On August 16, we delivered a webinar on MySQL backups. As always, we’ve had a number of interesting questions. Some of them we’ve answered on the webinar, but we’d like to share some of...
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Percona XtraBackup 2.4.9 Is Now Available
Percona announces the GA release of Percona XtraBackup 2.4.9 on November 29, 2017. You can download it from our download site and apt and yum repositories. Percona XtraBackup enables MySQL backups...
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Percona XtraBackup 2.3.10 Is Now Available
Percona announces the release of Percona XtraBackup 2.3.10 on November 29, 2017. Downloads are available from our download site or Percona Software Repositories. Percona XtraBackup enables MySQL...
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Percona XtraBackup 2.4.10 Is Now Available
Percona announces the GA release of Percona XtraBackup 2.4.10 on March 30, 2018. This release is based on MySQL 5.7.19. You can download it from our download site and apt and yum repositories. Percona...
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Percona XtraBackup 2.4.11 Is Now Available
Percona announces the GA release of Percona XtraBackup 2.4.11 on April 24, 2018. This release is based on MySQL 5.7.19. You can download it from our download site and apt and yum repositories. Percona...
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Percona XtraBackup 2.4.12 Is Now Available
Percona announces the GA release of Percona XtraBackup 2.4.12 on June 22, 2018. You can download it from our download site and apt and yum repositories. Percona XtraBackup enables MySQL backups without...
View ArticleData Recovery Toolkit for InnoDB Version 0.1 Released
As Peter mentioned in one of previous posts, we’ve done huge work developing robust strategies of InnoDB data recovery to provide our customers effective data recovery services and one of major parts...
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Recovery after DROP [ TABLE | DATABASE ]
In your recovery practice we often face the problem when data lost by execution DROP TABLE or DROP DATABASE statement. In this case even our InnoDB Data Recovery tool can’t help, as table / directory...
View ArticleDebugging problems with row based replication
MySQL 5.1 introduces row based binary logging. In fact, the default binary logging format in GA versions of MySQL 5.1 is ‘MIXED’ STATEMENT*; The binlog_format variable can still be changed per...
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Recover BLOB fields
For a long time long types like BLOB, TEXT were not supported by Percona InnoDB Recovery Tool. The reason consists in a special way InnoDB stores BLOBs. An InnoDB table is stored in a clustered index...
View ArticleAn argument for not using mysqldump
I have a 5G mysqldump which takes 30 minutes to restore from backup. That means that when the database reaches 50G, it should take 30×10=5 hours to restore. Right? Wrong. Mysqldump recovery time...
View ArticleLost innodb tables, xfs and binary grep
Before I start a story about the data recovery case I worked on yesterday, here’s a quick tip – having a database backup does not mean you can restore from it. Always verify your backup can be used to...
View ArticleHow long is recovery from 8G innodb_log_file
In my previous posts I highlighted that one of improvements in Percona Server is support of innodb_log_file_size > 4G. This test was done using Percona Server 5.5.7, but the same performance...
View ArticleRecovery after DROP & CREATE
In a very popular data loss scenario a table is dropped and empty one is created with the same name. This is because mysqldump in many cases generates the “DROP TABLE” instruction before the “CREATE...
View ArticleHow to recover table structure from InnoDB dictionary
To recover a dropped or corrupt table with Percona Data Recovery Tool for InnoDB you need two things: media with records(ibdata1, *.ibd, disk image, etc.) and a table structure. Indeed, there is no...
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Percona XtraBackup 2.4.13 Is Now Available
Percona is glad to announce the release of Percona XtraBackup 2.4.13 on January 18, 2018. You can download it from our download site and apt and yum repositories. Percona XtraBackup enables MySQL...
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Percona XtraBackup 2.4.14 Is Now Available
Percona is glad to announce the release of Percona XtraBackup 2.4.14 on May 1, 2019. You can download it from our download site and apt and yum repositories. Percona XtraBackup enables MySQL backups...
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Percona XtraBackup 8.0.6 Is Now Available
Percona is glad to announce the release of Percona XtraBackup 8.0.6 on May 9, 2019. You can download it from our download site and apt and yum repositories. Percona XtraBackup enables MySQL backups...
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Percona XtraBackup 2.4.15 Is Now Available
Percona is glad to announce the release of Percona XtraBackup 2.4.15 on July 10, 2019. You can download it from our download site and apt and yum repositories.Percona XtraBackup enables MySQL backups...
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Percona XtraBackup 8.0.7 Is Now Available
Percona is glad to announce the release of Percona XtraBackup 8.0.7 on August 7, 2019. You can download it from our download site and apt and yum repositories. Percona XtraBackup enables MySQL backups...
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