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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.
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| .. | ||
| archive | ||
| binlog | ||
| binlog_encryption | ||
| compat/oracle | ||
| csv | ||
| encryption | ||
| engines | ||
| federated | ||
| funcs_1 | ||
| funcs_2 | ||
| galera | ||
| galera_3nodes | ||
| gcol | ||
| handler | ||
| heap | ||
| innodb | ||
| innodb_fts | ||
| innodb_gis | ||
| innodb_undo | ||
| innodb_zip | ||
| jp | ||
| json | ||
| large_tests | ||
| maria | ||
| mariabackup | ||
| mtr/t | ||
| mtr2 | ||
| multi_source | ||
| optimizer_unfixed_bugs | ||
| parts | ||
| perfschema | ||
| perfschema_stress | ||
| plugins | ||
| roles | ||
| rpl | ||
| sql_sequence | ||
| storage_engine | ||
| stress | ||
| sys_vars | ||
| unit | ||
| vcol | ||
| versioning | ||
| wsrep | ||