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Diffstat (limited to 'storage/xtradb/include/log0online.h')
| -rw-r--r-- | storage/xtradb/include/log0online.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/storage/xtradb/include/log0online.h b/storage/xtradb/include/log0online.h new file mode 100644 index 00000000000..0e0ca169f6f --- /dev/null +++ b/storage/xtradb/include/log0online.h @@ -0,0 +1,111 @@ +/***************************************************************************** + +Copyright (c) 2011-2012, Percona Inc. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/**************************************************//** +@file include/log0online.h +Online database log parsing for changed page tracking +*******************************************************/ + +#ifndef log0online_h +#define log0online_h + +#include "univ.i" +#include "os0file.h" + +/*********************************************************************//** +Initializes the online log following subsytem. */ +UNIV_INTERN +void +log_online_read_init(); +/*===================*/ + +/*********************************************************************//** +Shuts down the online log following subsystem. */ +UNIV_INTERN +void +log_online_read_shutdown(); +/*=======================*/ + +/*********************************************************************//** +Reads and parses the redo log up to last checkpoint LSN to build the changed +page bitmap which is then written to disk. */ +UNIV_INTERN +void +log_online_follow_redo_log(); +/*=========================*/ + +/** The iterator through all bits of changed pages bitmap blocks */ +struct log_bitmap_iterator_struct +{ + char in_name[FN_REFLEN]; /*!< the file name for bitmap + input */ + os_file_t in; /*!< the bitmap input file */ + ib_uint64_t in_offset; /*!< the next write position in the + bitmap output file */ + ib_uint32_t bit_offset; /*!< bit offset inside of bitmap + block*/ + ib_uint64_t start_lsn; /*!< Start lsn of the block */ + ib_uint64_t end_lsn; /*!< End lsn of the block */ + ib_uint32_t space_id; /*!< Block space id */ + ib_uint32_t first_page_id; /*!< First block page id */ + ibool changed; /*!< true if current page was changed */ + byte* page; /*!< Bitmap block */ +}; + +typedef struct log_bitmap_iterator_struct log_bitmap_iterator_t; + +#define LOG_BITMAP_ITERATOR_START_LSN(i) \ + ((i).start_lsn) +#define LOG_BITMAP_ITERATOR_END_LSN(i) \ + ((i).end_lsn) +#define LOG_BITMAP_ITERATOR_SPACE_ID(i) \ + ((i).space_id) +#define LOG_BITMAP_ITERATOR_PAGE_NUM(i) \ + ((i).first_page_id + (i).bit_offset) +#define LOG_BITMAP_ITERATOR_PAGE_CHANGED(i) \ + ((i).changed) + +/*********************************************************************//** +Initializes log bitmap iterator. +@return TRUE if the iterator is initialized OK, FALSE otherwise. */ +UNIV_INTERN +ibool +log_online_bitmap_iterator_init( +/*============================*/ + log_bitmap_iterator_t *i); /*!<in/out: iterator */ + +/*********************************************************************//** +Releases log bitmap iterator. */ +UNIV_INTERN +void +log_online_bitmap_iterator_release( +/*===============================*/ + log_bitmap_iterator_t *i); /*!<in/out: iterator */ + +/*********************************************************************//** +Iterates through bits of saved bitmap blocks. +Sequentially reads blocks from bitmap file(s) and interates through +their bits. Ignores blocks with wrong checksum. +@return TRUE if iteration is successful, FALSE if all bits are iterated. */ +UNIV_INTERN +ibool +log_online_bitmap_iterator_next( +/*============================*/ + log_bitmap_iterator_t *i); /*!<in/out: iterator */ + +#endif |