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947efe17ed
This is based on a prototype by
Thirunarayanan Balathandayuthapani <thiru@mariadb.com>.
Binlog and Galera write-set replication information was written into
TRX_SYS page on each commit. Instead of writing to the TRX_SYS during
normal operation, InnoDB can make use of rollback segment header pages,
which are already being written to during a commit.
The following list of fields in rollback segment header page are added:
TRX_RSEG_BINLOG_OFFSET
TRX_RSEG_BINLOG_NAME (NUL-terminated; empty name = not present)
TRX_RSEG_WSREP_XID_FORMAT (0=not present; 1=present)
TRX_RSEG_WSREP_XID_GTRID
TRX_RSEG_WSREP_XID_BQUAL
TRX_RSEG_WSREP_XID_DATA
trx_sys_t: Introduce the fields
recovered_binlog_filename, recovered_binlog_offset, recovered_wsrep_xid.
To facilitate upgrade from older mysql or mariaDB versions, we will read
the information in TRX_SYS page. It will be overridden by the
information that we find in rollback segment header pages.
Mariabackup --prepare will read the metadata from the rollback
segment header pages via trx_rseg_array_init(). It will still
not read any undo log pages or recover any transactions.
25 lines
648 B
Text
25 lines
648 B
Text
--source include/have_innodb.inc
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--source include/have_log_bin.inc
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let $basedir=$MYSQLTEST_VARDIR/tmp/backup;
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CREATE TABLE t(a varchar(60)) ENGINE INNODB;
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INSERT INTO t VALUES(1);
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SHOW VARIABLES like 'log_bin';
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--disable_result_log
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exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf --backup --target-dir=$basedir;
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--enable_result_log
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exec $XTRABACKUP --prepare --binlog-info=1 --apply-log-only --target-dir=$basedir ;
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let SEARCH_FILE=$MYSQLTEST_VARDIR/log/current_test;
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--let SEARCH_PATTERN= Last binlog file .*, position .*
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--source include/search_pattern_in_file.inc
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--echo # expect FOUND
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DROP TABLE t;
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# Cleanup
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rmdir $basedir;
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