pt-table-checksum binlog_format=ROW issue

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In the first postI showed you how to use the. Slave1 executes the checksum queries, and all seems good until that point. But then Slave1 will also write the changes to its binary log to replicate to Slave2. In this case, pt-table-checksum binlog_format is what happens with Slave2, which is why.

Data inconsistencies can occur in Galera Cluster because of human errors or bugs. The example above is a good one — Node1, Node2 pt-table-checksum binlog_format Node3 all pt-table-checksum binlog_format to a single cluster. Refer to documentation for pt-table-checksum binlog_format details. The differences are found on Node3. Now the next big challenge is to synchronize Node3 with the other nodes in the cluster. To workaround this problem, use the. But here is the problem: So pt-table-checksum binlog_format do we synchronized those changes in Galera Cluster?

This could be risky if you forgot to disable binary logging pt-table-checksum binlog_format. So, be careful with this method! Between the time it takes to generate the SQL file and pt-table-checksum binlog_format it, there is a chance that the rows in question could change.

In fact, the most pt-table-checksum binlog_format method is to stop writing to the table that needs to be synchronized on all the nodes before running. You can resume writes on the table after the sync operation for the target table completes. As during this synchronization process, this node may lag behind and flow control will no longer take care of the desynced node.

Another approach is to rebuild database table in question. You need to run it through one of the authoritative synchronization nodes of the cluster, as below:. Once the table is rebuild, ROW images will be pt-table-checksum binlog_format to the node needing synchronization. It might be a good idea to use the —dry-run option before doing the actual changes with —execute. If the database table is in gigabytes and terabytes, and the differences in rows are few compared to the actual table size, then the first approach could be faster but riskier.

In next example, I have added an async node as a replica of Node1, where Node1 acts as the master server for the async slave. The setup looks like:. In this case, the tool needs to be executed from the master node Node1. Pt-table-checksum binlog_format reality, there is no deadlock found from the InnoDB status. In order to sync the slave with its master, you can take one of the approaches described above: Here, Node3 refused to find differences because there is no direct replica attached to it.

The documentation mentions this behavior, as cluster environment, differences can only be detected on pt-table-checksum binlog_format master node directly connected to async slave as is the case here with Node1 to async replica.

In order to run a checksum from Node3 to check for differences between cluster nodes, use the —recursion-method pt-table-checksum binlog_format in previous examples. Finally, after synchronizing the data changes it is a good idea to re-run the checksum tool to verify any discrepancies. If you understand the pt-table-checksum binlog_format, specify --no-check-binlog-format to disable this check.

Not checking replica lag on node3 because it is a cluster node. In fact, the most secure method is to stop writing to the table that pt-table-checksum binlog_format to be synchronized on all the nodes before pt-table-checksum binlog_format pt-table-sync.

You need to run it through one of the authoritative synchronization nodes of the cluster, as below: See --recursion-method if host node4 has slaves.

Not checking slave lag because no slaves were found and --check-slave-lag was not specified. Created new table test. The setup looks like: Please read the --recursion-method documentation for information.

SQL template, review changes carefully and execute it on nodes with the missing data. Again, this approach is fast but possibly dangerous.

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This release contains 1 new feature and 15 bug fixes. This release contains 3 new features and 2 bug fixes. Added --max-flow-ctl option with a value set in percent. When a Percona XtraDB Cluster node is very loaded, it sends flow control signals to the other nodes to stop sending transactions in order to catch up. When the average value of time spent in this state in percent exceeds the maximum provided in the option, the tool pauses until it falls below again.

Added the --sleep option for pt-online-schema-change to avoid performance problems. The option accepts float values in seconds. This feature was requested in the following bug: Implemented ability to specify --check-slave-lag multiple times.

The following example enables lag checks for two slaves:. Before, the tool would die if any slave connection was lost. Now the tool waits forever for slaves. The tool now checks replication lag every rows instead of every row, which significantly improves efficiency.

Adding underscores to constraints when using pt-online-schema-change can create issues with constraint name length. Before, multiple schema changes lead to underscores stacking up on the name of the constraint until it reached the 64 character limit. Now there is a limit of two underscores in the prefix, then the tool alternately removes or adds one underscore, attempting to make the name unique. When comparing table size with the slave table, the tool now ignores --chunk-size-limit if it is set to zero to avoid multiplying by zero.

Fixed the documentation for --check-interval to reflect its correct behavior. ReadKeyMini causes pt-online-schema-change session to lock under some circumstances. Removed ReadKeyMini, because it is no longer necessary. The tool now issues an error when --purge and --no-delete are specified together. This release contains two new features and seventeen bug fixes. This release contains one new feature and twelve bug fixes. This release contains one new feature and seven bug fixes. This release contains seven bug fixes.

This release contains six bug fixes. This release contains five bug fixes. This release has two new features and six bug fixes. Percona Toolkit packages can be downloaded from http: This release has only one bug fix. This fix removed that ability. This release has 16 bug fixes and a few new features. One bug fix is very important, so 2. Until recently, either no one had this problem, or no one reported it, or no one realized that pt-table-sync caused it.

In the worst case, pt-table-sync could delete all rows in child tables, which is quite surprising and bad. The tool is better now. This was poor feedback from the tool more than a bug. There was a point in the tool where it waited forever for slaves to catch up, but it did this silently. The change is that pt-mysql-summary no longer prompts to dump and summarize schemas. To do this, you must specify —databases or, a new option, —all-databases. Several users said this behavior was better, so we made the change even though some might consider it a backwards-incompatible change.

This release has four new features and a number of bugfixes. As of pt-table-checksum 2. An exit status of zero or 32 is equivalent to a zero exit status with skipped chunks in previous versions of the tool. New —no-drop-triggers option has been implemented for pt-online-schema-change in case users want to rename the tables manually, when the load is low. New —new-table-name option has been added to pt-online-schema-change which can be used to specify the temporary table name.

This release two new features and a number of bugfixes. Some people might not want this because it exposes real data. New option, —output json-anon, has been implemented. This option will provide the same data without query examples. When using drop swap with pt-online-schema-change there is some production impact. This impact can be measured because tool outputs the current timestamp on lines for operations that may take awhile. The pt-online-schema-change bug fix is bug This is the second release of the 2.

Users may note the revival of the —show-all option in pt-query-digest. This had been removed in 2. A new —recursion-method was added to pt-table-checksum: This revealed a case where the tool could corrupt data by double-encoding.

This is now fixed , but remains relatively dangerous if using DBD:: This is another solid bug fix release, and all users are encouraged to upgrade. This is the first release in the new 2. We plan to do one more bug fix release for 2.

Here are the highlights:. We started beta support for MySQL 5. Check out the Percona Toolkit supported platforms and versions: Now —set-vars is used to set both of these or any system variables. What does this all mean? Now that we have four base versions of MySQL 5.

Moreover, it has a really helpful new feature: Basically, we re-focused it on its primary objective: So the ability to parse memcached, Postgres, Apache, and other logs was removed.

The result is a simpler, more focused tool, i. This feature is still in development while we determine the optimal JSON structure. Way back in 2. For example, there are two versions of the DBD:: And there are certain versions of MySQL that have critical bugs.

Version check will warn you about these if your system is running them. SSL Perl module is installed easily available through your package manager , it will use a secure https connection over the web, else it will use a standard http connection. We removed pt-query-advisor, pt-tcp-model, pt-trend, and pt-log-player. Granted, no tool is ever really gone: The other tools were special projects that were not widely used. So now the command line is what you expect: Originally, pt-stalk —no-stalk was meant to simulate pt-collect, i.

To do that, the tool magically set some options and clobbered others, resulting in no way to do repeated collections at intervals. Now —no-stalk means only that: So to collect once and exit: Similar to the pt-stalk —no-stalk changes, pt-fk-error-logger and pt-deadlock-logger received mini overhauls in 2. And each treated their run-related options a little differently. This magic is gone now: There were other miscellaneous bug fixes , too.

As the first release in a new series, 2. In other words, we may change things like the pt-query-digest —output json format in future releases after receiving real-world feedback. Users are encouraged to begin upgrading, particularly given that, except for the forthcoming 2. If you upgrade from 2. This release primarily aims to restore backwards-compatibility with pt-heartbeat 2.

Unfortunately, these changes caused a loss of precision and, if mixing versions of pt-heartbeat, made the tool report a huge amount of replication lag.

This release makes the tool compatible with pt-heartbeat 2. This is an important bug fix for pt-table-sync: However, standard MySQL does not warn in this case, despite the docs saying that it should.