# redo log from before MariaDB 10.2.2/MySQL 5.7.9
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Upgrade after a crash is not supported. This redo log was created before MariaDB 10\.2\.2\./ in mysqld.1.err
# redo log from before MariaDB 10.2.2, with corrupted log checkpoint
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Upgrade after a crash is not supported. This redo log was created before MariaDB 10\.2\.2, and we did not find a valid checkpoint/ in mysqld.1.err
FOUND 2 /Plugin 'InnoDB' registration as a STORAGE ENGINE failed/ in mysqld.1.err
# redo log from before MariaDB 10.2.2, with corrupted log block
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Upgrade after a crash is not supported. This redo log was created before MariaDB 10\.2\.2, and it appears corrupted/ in mysqld.1.err
# empty redo log from before MariaDB 10.2.2
SELECT COUNT(*) FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
COUNT(*)
1
FOUND 1 /InnoDB: Upgrading redo log:/ in mysqld.1.err
# redo log from "after" MariaDB 10.2.2, but with invalid header checksum
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Invalid redo log header checksum/ in mysqld.1.err
# distant future redo log format, with valid header checksum
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Unsupported redo log format. The redo log was created with malicious intentions, or perhaps\./ in mysqld.1.err
# valid header, but old-format checkpoint blocks
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: No valid checkpoint found .corrupted redo log/ in mysqld.1.err
# valid header, valid checkpoint 1, all-zero (invalid) checkpoint 2, invalid block checksum
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Invalid log block checksum. block: 2372 checkpoint no: 1 expected: 3362026715 found: 144444122/ in mysqld.1.err
FOUND 1 /InnoDB: Missing MLOG_CHECKPOINT between the checkpoint 1213964 and the end 1213952\./ in mysqld.1.err
# same, but with current-version header
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 2 /InnoDB: Invalid log block checksum. block: 2372 checkpoint no: 1 expected: 3362026715 found: 144444122/ in mysqld.1.err
FOUND 2 /InnoDB: Missing MLOG_CHECKPOINT between the checkpoint 1213964 and the end 1213952\./ in mysqld.1.err
# --innodb-force-recovery=6 (skip the entire redo log)
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
InnoDB	YES	Supports transactions, row-level locking, foreign keys and encryption for tables	YES	YES	YES
FOUND 1 /\[Note\] InnoDB: .* started; log sequence number 0/ in mysqld.1.err
# valid header, valid checkpoint 1, all-zero (invalid) checkpoint 2, invalid block number
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
# --innodb-force-recovery=6 (skip the entire redo log)
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
InnoDB	YES	Supports transactions, row-level locking, foreign keys and encryption for tables	YES	YES	YES
# Test a corrupted MLOG_FILE_NAME record.
# valid header, valid checkpoint 1, all-zero (invalid) checkpoint 2
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Starting crash recovery from checkpoint LSN=1213964/ in mysqld.1.err
FOUND 1 /InnoDB: MLOG_FILE_NAME incorrect:bogus/ in mysqld.1.err
FOUND 1 /InnoDB: ############### CORRUPT LOG RECORD FOUND ##################/ in mysqld.1.err
FOUND 1 /InnoDB: Log record type 55, page 151:488\. Log parsing proceeded successfully up to 1213973\. Previous log record type 56, is multi 0 Recv offset 9, prev 0/ in mysqld.1.err
FOUND 1 /len 22. hex 38000000000012860cb7809781e80006626f67757300. asc 8               bogus / in mysqld.1.err
FOUND 1 /InnoDB: Set innodb_force_recovery to ignore this error/ in mysqld.1.err
# Test a corrupted MLOG_FILE_NAME record.
# valid header, invalid checkpoint 1, valid checkpoint 2, invalid block
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Invalid log block checksum. block: 2372 checkpoint no: 1 expected: 2454333373 found: 150151/ in mysqld.1.err
# valid header, invalid checkpoint 1, valid checkpoint 2, invalid log record
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: MLOG_FILE_NAME incorrect:bigot/ in mysqld.1.err
FOUND 1 /len 22; hex 38000000000012860cb7809781e800066269676f7400; asc 8               bigot ;/ in mysqld.1.err
# 10.2 missing MLOG_FILE_NAME or MLOG_FILE_DELETE before MLOG_CHECKPOINT
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /InnoDB: Missing MLOG_FILE_NAME or MLOG_FILE_DELETE before MLOG_CHECKPOINT for tablespace 42/ in mysqld.1.err
# 10.3 missing MLOG_FILE_NAME or MLOG_FILE_DELETE before MLOG_CHECKPOINT
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 2 /InnoDB: Missing MLOG_FILE_NAME or MLOG_FILE_DELETE before MLOG_CHECKPOINT for tablespace 42/ in mysqld.1.err
# Empty 10.3 redo log
SELECT COUNT(*) FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
COUNT(*)
1
FOUND 1 /InnoDB: .* started; log sequence number 121397[09]/ in mysqld.1.err
# Empty 10.2 redo log
SELECT COUNT(*) FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
COUNT(*)
1
FOUND 3 /InnoDB: Upgrading redo log:/ in mysqld.1.err
# Minimal MariaDB 10.1.21 encrypted redo log
SELECT COUNT(*) `1` FROM INFORMATION_SCHEMA.ENGINES WHERE engine='innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
1
1
FOUND 1 /InnoDB: Encrypting redo log/ in mysqld.1.err
ib_buffer_pool
ib_logfile0
ib_logfile1
ibdata1