Percona Server moved to https://jira.percona.com/projects/PS

lp:~stewart/percona-server/5.6-doublewrite

Created by Stewart Smith on 2012-10-25 and last modified on 2012-10-26

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On hold for merging into lp:percona-server/5.6

Laurynas Biveinis (community): Needs Fixing on 2012-11-13

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Branch information

Owner:: Stewart Smith

Project:: Percona Server moved to https://jira.percona.com/projects/PS

Status:: Abandoned

Recent revisions

310. By Stewart Smith on 2012-10-25

Port innodb_doublewrite_file to Percona Server 5.6

This was a little bit involved as the doublewrite buffer code has been
refactored in MySQL 5.6 out into buf0dblwr.cc.

One design difference in the 5.6 patch versus 5.5 and before is that where
InnoDB code has needed to be duplicated, I have instead refactored that code
to accept tablespace id as a parameter rather than copy&pasting it. With
this method, we should get merge conflicts if this code is changed upstream,
making it easier to ensure our end result code is correct.

309. By Stewart Smith on 2012-10-24

merge 5.6.7

308. By Stewart Smith on 2012-09-25

document that LRU dump/restore is replaced with MySQL implementation

307. By Stewart Smith on 2012-09-25

null merge innodb_lru_dump_restore.patch from PS5.5. Relpaced by MySQL functionality

306. By Stewart Smith on 2012-09-25

null merge innodb_extend_slow.patch from PS5.5. We're going to replace it with a plugin, possibly omitting some of the extended InnoDB parts

305. By Stewart Smith on 2012-09-18

merge null-merge of show-lock-name patch

304. By Stewart Smith on 2012-09-18

merge show temp tables test fixes

303. By Stewart Smith on 2012-09-12

null merge innodb_admin_command_base.patch as it was only used for manual LRU dump/restore and this is now native in MySQL 5.6

302. By Stewart Smith on 2012-09-12

null merge innodb_recovery_patches.patch - two bug fixes have been broken out into separate commits and we aren't bringing innodb_recovery_stats forward to PS 5.6

301. By Stewart Smith on 2012-09-12

Extract fix for http://bugs.mysql.com/bug.php?id=44140 from innodb_recovery_patches.patch

Description from original bug report:
Description:
Sometimes (it is really rare), We meet the error message during crash recovery of InnoDB.

090405 4:29:47 InnoDB: ERROR: We were only able to scan the log up to 1319 813701532
InnoDB: but a database page a had an lsn 1319 814039859. It is possible that the
InnoDB: database is now corrupt!

I accept the message as,,
"There have been some logged modification to certain page before the last recv_recover_page() for the page"

And I have caught the modification.
#0 0x00000000004a5b60 in log_close ()
#1 0x00000000004d93b9 in mtr_commit ()
#2 0x000000000042e572 in ibuf_delete_rec ()
#3 0x000000000042f314 in ibuf_merge_or_delete_for_page ()
#4 0x000000000049724e in buf_page_io_complete ()
#5 0x00000000004cbdd7 in fil_aio_wait ()
#6 0x000000000040c678 in io_handler_thread ()

I suspect ibuf_merge_or_delete_for_page() from buf_page_io_complete() (triggered by recv_read_in_area()) and recv_recover_page() from recv_apply_hashed_log_recs() can conflict.

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Stacked on:: lp:percona-server/5.5

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