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Update rds docs

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Tobias Johansson 2019-12-10 13:57:18 +01:00
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@ -26,6 +26,14 @@ If you use `pt-table-checksum` as a part of your data integrity checks, you migh
This tool requires binlog_format=STATEMENT, but the current binlog_format is set to ROW and an error occurred while attempting to change it. If running MySQL 5.1.29 or newer, setting binlog_format requires the SUPER privilege. You will need to manually set binlog_format to 'STATEMENT' before running this tool. This tool requires binlog_format=STATEMENT, but the current binlog_format is set to ROW and an error occurred while attempting to change it. If running MySQL 5.1.29 or newer, setting binlog_format requires the SUPER privilege. You will need to manually set binlog_format to 'STATEMENT' before running this tool.
``` ```
#### Binlog filtering
In Aurora, the [binlog filtering feature][aws_replication_docs_bin_log_filtering] is enabled by default. This becomes an issue when gh-ost tries to do the cut-over, because gh-ost waits for an entry in the binlog to proceed but this entry will never end up in the binlog because it gets filtered out by the binlog filtering feature.
You need to turn this feature off during the migration process.
Set the `aurora_enable_repl_bin_log_filtering` parameter to 0 in the Parameter Group for your cluster.
When the migration is done, set it back to 1 (default).
#### Preflight checklist #### Preflight checklist
Before trying to run any `gh-ost` migrations you will want to confirm the following: Before trying to run any `gh-ost` migrations you will want to confirm the following:
@ -35,6 +43,7 @@ Before trying to run any `gh-ost` migrations you will want to confirm the follow
- [ ] Executing `SHOW SLAVE STATUS\G` on your replica cluster displays the correct master host, binlog position, etc. - [ ] Executing `SHOW SLAVE STATUS\G` on your replica cluster displays the correct master host, binlog position, etc.
- [ ] Database backup retention is greater than 1 day to enable binlogs - [ ] Database backup retention is greater than 1 day to enable binlogs
- [ ] You have setup [`hooks`][ghost_hooks] to issue RDS procedures for stopping and starting replication. (see [github/gh-ost#163][ghost_rds_issue_tracking] for examples) - [ ] You have setup [`hooks`][ghost_hooks] to issue RDS procedures for stopping and starting replication. (see [github/gh-ost#163][ghost_rds_issue_tracking] for examples)
- [ ] The parameter `aurora_enable_repl_bin_log_filtering` is set to 0
[new_issue]: https://github.com/github/gh-ost/issues/new [new_issue]: https://github.com/github/gh-ost/issues/new
[assume_rbr_docs]: https://github.com/github/gh-ost/blob/master/doc/command-line-flags.md#assume-rbr [assume_rbr_docs]: https://github.com/github/gh-ost/blob/master/doc/command-line-flags.md#assume-rbr
@ -43,3 +52,4 @@ Before trying to run any `gh-ost` migrations you will want to confirm the follow
[percona_toolkit_patch]: https://github.com/jacobbednarz/percona-toolkit/commit/0271ba6a094da446a5e5bb8d99b5c26f1777f2b9 [percona_toolkit_patch]: https://github.com/jacobbednarz/percona-toolkit/commit/0271ba6a094da446a5e5bb8d99b5c26f1777f2b9
[ghost_hooks]: https://github.com/github/gh-ost/blob/master/doc/hooks.md [ghost_hooks]: https://github.com/github/gh-ost/blob/master/doc/hooks.md
[ghost_rds_issue_tracking]: https://github.com/github/gh-ost/issues/163 [ghost_rds_issue_tracking]: https://github.com/github/gh-ost/issues/163
[aws_replication_docs_bin_log_filtering]: https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Replication.html#AuroraMySQL.Replication.Performance