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Displaying posts with tag: Xtrabackup (reset)
when xtrabackup fails with 'read' returned OS error 0 after upgrading to 5.7

Here's something that has puzzled me for several weeks.
Right after migrating  MySQL from 5.6 to 5.7, we started experiencing random xtrabackup failures on some, but not all, of our slaves.
The failures were only happening when taking an incremental backup, and it would always fail on the same table on each slave, with errors similar to the following:

171106 13:00:33 [01] Streaming ./gls/C_GLS_IDS_AUX.ibd
InnoDB: 262144 bytes should have been read. Only 114688 bytes read. Retrying for the remaining bytes.
InnoDB: 262144 bytes should have been read. Only 114688 bytes read. Retrying for the remaining bytes.
InnoDB: 262144 bytes should have been read. Only 114688 bytes read. Retrying for the remaining bytes.
InnoDB: 262144 bytes should have been read. Only 114688 bytes read. Retrying for the remaining bytes.
InnoDB: 262144 bytes should have been read. Only 114688 bytes read. Retrying for …

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How to setup a replication slave with TwinDB Backup tool

Setting up a replication slave is pretty straightforward, yet cumbersome process that needs a lot of attention to details. Look, even if the six steps are simple, together they constitute something I cannot call simple. We decided to fix that. Our TwinDB Backup tool can take backups, can restore them, can copy files over the […]

The post How to setup a replication slave with TwinDB Backup tool appeared first on TwinDB.

Fun with Bugs #53 - On Some Percona Software Bugs I've Reported

So far in this series I had written only/mostly about MySQL server bugs. Does it mean that there are no unique or interesting bugs in other MySQL-related software or MySQL forks and projects that use MySQL code?

Surely no, it doesn't. So, today I'd like to present a short list of currently active (that is, new or probably not yet resolved) bugs that I had reported for Percona's software at Launchpad over the years I use it. The list is based on this link, but I excluded minor reports and those that probably are just forgotten, while the problem is fixed long time ago.

Let me start with bugs in XtraBackup, the tool that plays a key role in most MySQL environments that are not using Oracle's Enterprise …

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How to backup MySQL 5.7

If you ever tried to backup MySQL 5.7 with Percona Xtrabackup that comes in percona-xtrabackup package most likely you got error message like this: [crayon-5a1641708bdbe655063987/] This happens because percona-xtrabackup actually installs version 2.3 that doesn’t support MySQL 5.7. To take copies from MySQL 5.7 you need to use Percona XtraBackup version 2.4 and higher. Starting from […]

The post How to backup MySQL 5.7 appeared first on TwinDB.

Percona XtraBackup 2.4.7-2 is Now Available

Percona announces the GA release of Percona XtraBackup 2.4.7-2 on May 29, 2017. You can download it from our download site and apt and yum repositories.

Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered free as an open source solution, Percona …

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Percona XtraBackup 2.3.8 is Now Available

Percona announces the release of Percona XtraBackup 2.3.8 on April 18, 2017. Downloads are available from our download site or Percona Software Repositories.

Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered free as an open source solution, Percona XtraBackup drives down backup costs while providing unique features for MySQL backups.

This release is the …

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Performance Evaluation of SST Data Transfer: With Encryption (Part 2)

In this blog post, we’ll look at the performance of SST data transfer using encryption.

In my previous post, we reviewed SST data transfer in an unsecured environment. Now let’s take a closer look at a setup with encrypted network connections between the donor and joiner nodes.

The base setup is the same as the previous time:

  • Database server: Percona XtraDB Cluster 5.7 on donor node
  • Database: sysbench database – 100 tables 4M rows each (total ~122GB)
  • Network: donor/joiner hosts are connected with dedicated 10Gbit LAN
  • Hardware: donor/joiner hosts – boxes with 28 Cores+HT/RAM 256GB/Samsung SSD 850/Ubuntu 16.04

The setup details for the encryption aspects in our testing:

  • Cryptography libraries: openssl-1.0.2, …
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Howto Encrypt MySQL Backups on S3

TwinDB Backup supports encrypted backup copies since version 2.11.0. As usual the tool supports natively backup and restore operations, if backup copies are encrypted the tool takes care of decryption. Installing TwinDB Packages repository I will work with CentOS 7 system to show the example, but there are also packages for Ubuntu trusty and Debian […]

The post Howto Encrypt MySQL Backups on S3 appeared first on TwinDB.

Using xtrabackup with MariaDB and multi source replication

Quick post today, because I wanted to share a snippet (actually, a patch) that allows the great xtrabackup tool to take backups of MariaDB when multi source replication is in use.

Granted, this is supported already, except the slave(s) position is not saved when the backup is taken, and this somewhat defeats the purpose of the backup, which should be used to rebuild the server and resync it with its master(s) in case of disaster.

A workaround for using xtrabackup with MariaDB exists, but only works when you have a single master: just set the default_master_connection variable in your my.cnf to the name of your master connection,  and you are set - in fact, in this situation, SHOW SLAVE STATUS will work exactly the same as in stock MySQL, and xtrabackup is happy.

The trouble begins when you have …

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MySQL Support Engineer's Chronicles, Issue #5

A lot of time passed since my previous post in this series. I was busy with work, participating in FOSDEM, blogging about profilers and sharing various lists of MySQL bugs. But I do not plan to stop writing about my usual weeks of doing support engineer's job. So, time for the next post in this series, based on my random notes taken during the week here and there.

This week started for me with checking recent MySQL bug reports (actually I do it every day). …

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