#
# Bug #17335427 INNODB CAN NOT USE THE DOUBLEWRITE BUFFER PROPERLY
# Bug #18144349 INNODB CANNOT USE THE DOUBLEWRITE BUFFER FOR THE FIRST
# PAGE OF SYSTEM TABLESPACE
#
show variables like 'innodb_doublewrite';
Variable_name	Value
innodb_doublewrite	ON
show variables like 'innodb_fil_make_page_dirty_debug';
Variable_name	Value
innodb_fil_make_page_dirty_debug	0
show variables like 'innodb_saved_page_number_debug';
Variable_name	Value
innodb_saved_page_number_debug	0
create table t1 (f1 int primary key, f2 blob) engine=innodb stats_persistent=0;
start transaction;
insert into t1 values(1, repeat('#',12));
insert into t1 values(2, repeat('+',12));
insert into t1 values(3, repeat('/',12));
insert into t1 values(4, repeat('-',12));
insert into t1 values(5, repeat('.',12));
commit work;
# Test Begin: Test if recovery works if 1st page and 2nd page
# of system tablespace is full of zeroes.
SET GLOBAL innodb_fast_shutdown = 0;
# restart: --debug_dbug=+d,ib_log_checkpoint_avoid_hard --innodb_flush_sync=0
begin;
insert into t1 values (6, repeat('%', 400));
# Make the first page dirty for system tablespace
set global innodb_saved_page_number_debug = 0;
set global innodb_fil_make_page_dirty_debug = 0;
# Make the second page dirty for system tablespace
set global innodb_saved_page_number_debug = 1;
set global innodb_fil_make_page_dirty_debug = 0;
set global innodb_buf_flush_list_now = 1;
# Kill the server
# Make the 1st page (page_no=0) and 2nd page (page_no=1)
# of the system tablespace all zeroes.
# restart
FOUND 1 /InnoDB: Restoring page \[page id: space=0, page number=0\] of datafile/ in mysqld.1.err
FOUND 1 /InnoDB: Recovered page \[page id: space=0, page number=1\]/ in mysqld.1.err
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
select f1, f2 from t1;
f1	f2
1	############
2	++++++++++++
3	////////////
4	------------
5	............
# Test End
# ---------------------------------------------------------------
# Test Begin: Test if recovery works if 1st page of
# system tablespace is corrupted and 2nd page as corrupted.
# restart: --debug_dbug=+d,ib_log_checkpoint_avoid_hard --innodb_flush_sync=0
begin;
insert into t1 values (6, repeat('%', 400));
# Make the first page dirty for system tablespace
set global innodb_saved_page_number_debug = 0;
set global innodb_fil_make_page_dirty_debug = 0;
# Make the second page dirty for system tablespace
set global innodb_saved_page_number_debug = 1;
set global innodb_fil_make_page_dirty_debug = 0;
set global innodb_buf_flush_list_now = 1;
# Kill the server
# Corrupt the 1st page (page_no=0) and 2nd page of the system tablespace.
# restart
FOUND 2 /InnoDB: Restoring page \[page id: space=0, page number=0\] of datafile/ in mysqld.1.err
FOUND 2 /InnoDB: Recovered page \[page id: space=0, page number=1\]/ in mysqld.1.err
check table t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
select f1, f2 from t1;
f1	f2
1	############
2	++++++++++++
3	////////////
4	------------
5	............
drop table t1;
# Test End
# ---------------------------------------------------------------
#
# MDEV-12600 crash during install_db with innodb_page_size=32K
# and ibdata1=3M
#
# restart: --innodb-log-group-home-dir=MYSQLTEST_VARDIR/tmp/doublewrite --innodb-data-home-dir=MYSQLTEST_VARDIR/tmp/doublewrite --innodb-undo-tablespaces=0 --innodb-data-file-path=ibdata1:1M;ibdata2:1M:autoextend
SELECT * FROM INFORMATION_SCHEMA.ENGINES
WHERE engine = 'innodb'
AND support IN ('YES', 'DEFAULT', 'ENABLED');
ENGINE	SUPPORT	COMMENT	TRANSACTIONS	XA	SAVEPOINTS
FOUND 1 /\[ERROR\] InnoDB: Cannot create doublewrite buffer/ in mysqld.1.err
# restart