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6cad020440
This is used to bzero all not used parts of the index pages and compact and bzero the not used parts of the data pages of block-record type Added --zerofill (-z) option to maria_chk (Mostly code from Jani) Added now table states ZEROFILLED and MOVEABLE Set state.changed with new states when things changes include/maria.h: Added maria_zerofill include/myisamchk.h: Added option for zerofill Extend testflag to be 64 to allow for more flags mysql-test/r/create.result: Updated results after merge mysql-test/r/maria.result: Updated results after merge mysys/my_getopt.c: Removed not used variable sql/sql_show.cc: Fixed wrong page type storage/maria/ma_blockrec.c: Renamed compact_page() to ma_compact_block_page() and made it global Always zerofill half filled blob pages Set share.state.changed on REDO storage/maria/ma_blockrec.h: Added _ma_compact_block_page() storage/maria/ma_check.c: Added maria_zerofill() This is used to bzero all not used parts of the index pages and compact and bzero the not used parts of the data pages of block-record type This gives the following benefits: - Table is smaller if compressed - All LSN are removed for transactinal tables and this makes them movable between systems Dont set table states of we are using --quick Changed log entry for repair to use 8 bytes for flag storage/maria/ma_delete.c: Simplify code Update state.changed storage/maria/ma_key_recover.c: Update state.changed storage/maria/ma_locking.c: Set uuid for file on first change if it's not set (table was cleared with zerofill) storage/maria/ma_loghandler.c: Updated log entry for REDO_REPAIR_TABLE storage/maria/ma_recovery.c: Updated log entry for REDO_REPAIR_TABLE (flag is now 8 bytes) Set new bits in state.changed storage/maria/ma_test_all.sh: Nicer output storage/maria/ma_test_recovery.expected: Updated results (now states flags are visible) storage/maria/ma_update.c: Update state.changed storage/maria/ma_write.c: Simplify code Set state.changed storage/maria/maria_chk.c: Added option --zerofill Added printing of states for MOVABLE and ZEROFILLED MYD -> MAD MYI -> MAI storage/maria/maria_def.h: Added states STATE_NOT_MOVABLE and STATE_NOT_ZEROFILLED Added prototype for new functions storage/maria/unittest/ma_test_all-t: More tests, including tests for zerofill Removed some not needed 'print' statements storage/maria/unittest/ma_test_loghandler_multithread-t.c: Smaller buffer to not trash devlopment machines totally
260 lines
12 KiB
C
260 lines
12 KiB
C
/* Copyright (C) 2007 Michael Widenius
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/*
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Storage of records in block
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*/
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#define LSN_SIZE 7
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#define DIR_COUNT_SIZE 1 /* Stores number of rows on page */
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#define DIR_FREE_SIZE 1 /* Pointer to first free dir entry */
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#define EMPTY_SPACE_SIZE 2 /* Stores empty space on page */
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#define PAGE_TYPE_SIZE 1
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#define PAGE_SUFFIX_SIZE 4 /* Bytes for checksum */
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#define PAGE_HEADER_SIZE (LSN_SIZE + DIR_COUNT_SIZE + DIR_FREE_SIZE +\
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EMPTY_SPACE_SIZE + PAGE_TYPE_SIZE)
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#define PAGE_OVERHEAD_SIZE (PAGE_HEADER_SIZE + DIR_ENTRY_SIZE + \
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PAGE_SUFFIX_SIZE)
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#define BLOCK_RECORD_POINTER_SIZE 6
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#define FULL_PAGE_SIZE(block_size) ((block_size) - LSN_SIZE - \
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PAGE_TYPE_SIZE - PAGE_SUFFIX_SIZE)
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#define ROW_EXTENT_PAGE_SIZE 5
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#define ROW_EXTENT_COUNT_SIZE 2
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#define SUB_RANGE_SIZE 2
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#define BLOCK_FILLER_SIZE 2
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#define ROW_EXTENT_SIZE (ROW_EXTENT_PAGE_SIZE + ROW_EXTENT_COUNT_SIZE)
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#define TAIL_BIT 0x8000 /* Bit in page_count to signify tail */
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#define START_EXTENT_BIT 0x4000 /* Bit in page_count to signify start*/
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/* page_count set by bitmap code for tail pages */
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#define TAIL_PAGE_COUNT_MARKER 0xffff
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/* Number of extents reserved MARIA_BITMAP_BLOCKS to store head part */
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#define ELEMENTS_RESERVED_FOR_MAIN_PART 4
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/* This is just used to prealloc a dynamic array */
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#define AVERAGE_BLOB_SIZE 1024L*1024L
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/* Number of pages to store continuous blob parts */
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#define BLOB_SEGMENT_MIN_SIZE 128
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/* Fields before 'row->null_field_lengths' used by find_where_to_split_row */
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#define EXTRA_LENGTH_FIELDS 3
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/* Size for the different parts in the row header (and head page) */
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#define FLAG_SIZE 1
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#define VERPTR_SIZE 7
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#define DIR_ENTRY_SIZE 4
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#define FIELD_OFFSET_SIZE 2 /* size of pointers to field starts */
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/* Minimum header size needed for a new row */
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#define BASE_ROW_HEADER_SIZE FLAG_SIZE
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#define TRANS_ROW_EXTRA_HEADER_SIZE TRANSID_SIZE
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#define PAGE_TYPE_MASK 7
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enum en_page_type { UNALLOCATED_PAGE, HEAD_PAGE, TAIL_PAGE, BLOB_PAGE, MAX_PAGE_TYPE };
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#define PAGE_TYPE_OFFSET LSN_SIZE
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#define DIR_COUNT_OFFSET (LSN_SIZE+PAGE_TYPE_SIZE)
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#define DIR_FREE_OFFSET (DIR_COUNT_OFFSET+DIR_COUNT_SIZE)
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#define EMPTY_SPACE_OFFSET (DIR_FREE_OFFSET+DIR_FREE_SIZE)
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#define PAGE_CAN_BE_COMPACTED 128 /* Bit in PAGE_TYPE */
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/* Bits used for flag uchar (one byte, first in record) */
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#define ROW_FLAG_TRANSID 1
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#define ROW_FLAG_VER_PTR 2
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#define ROW_FLAG_DELETE_TRANSID 4
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#define ROW_FLAG_NULLS_EXTENDED 8
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#define ROW_FLAG_EXTENTS 128
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#define ROW_FLAG_ALL (1+2+4+8+128)
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/******** Variables that affects how data pages are utilized ********/
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/* Minium size of tail segment */
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#define MIN_TAIL_SIZE 32
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/*
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Fixed length part of Max possible header size; See row data structure
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table in ma_blockrec.c.
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*/
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#define MAX_FIXED_HEADER_SIZE (FLAG_SIZE + 3 + ROW_EXTENT_SIZE + 3)
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#define TRANS_MAX_FIXED_HEADER_SIZE (MAX_FIXED_HEADER_SIZE + \
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TRANSID_SIZE + VERPTR_SIZE + \
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TRANSID_SIZE)
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/* We use 1 uchar in record header to store number of directory entries */
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#define MAX_ROWS_PER_PAGE 255
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#define END_OF_DIR_FREE_LIST ((uchar) 255)
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/* Bits for MARIA_BITMAP_BLOCKS->used */
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/* We stored data on disk in the block */
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#define BLOCKUSED_USED 1
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/* Bitmap on disk is block->org_bitmap_value ; Happens only on update */
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#define BLOCKUSED_USE_ORG_BITMAP 2
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/* We stored tail data on disk for the block */
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#define BLOCKUSED_TAIL 4
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/******* defines that affects allocation (density) of data *******/
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/*
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If the tail part (from the main block or a blob) would use more than 75 % of
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the size of page, store the tail on a full page instead of a shared
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tail page.
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*/
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#define MAX_TAIL_SIZE(block_size) ((block_size) *3 / 4)
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/* Don't allocate memory for too many row extents on the stack */
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#define ROW_EXTENTS_ON_STACK 32
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/* Functions to convert MARIA_RECORD_POS to/from page:offset */
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static inline MARIA_RECORD_POS ma_recordpos(ulonglong page, uint dir_entry)
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{
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DBUG_ASSERT(dir_entry <= 255);
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return (MARIA_RECORD_POS) ((page << 8) | dir_entry);
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}
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static inline my_off_t ma_recordpos_to_page(MARIA_RECORD_POS record_pos)
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{
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return record_pos >> 8;
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}
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static inline uint ma_recordpos_to_dir_entry(MARIA_RECORD_POS record_pos)
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{
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return (uint) (record_pos & 255);
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}
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static inline uchar *dir_entry_pos(uchar *buff, uint block_size, uint pos)
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{
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return (buff + block_size - DIR_ENTRY_SIZE * pos - PAGE_SUFFIX_SIZE -
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DIR_ENTRY_SIZE);
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}
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/* ma_blockrec.c */
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void _ma_init_block_record_data(void);
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my_bool _ma_once_init_block_record(MARIA_SHARE *share, File dfile);
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my_bool _ma_once_end_block_record(MARIA_SHARE *share);
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my_bool _ma_init_block_record(MARIA_HA *info);
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void _ma_end_block_record(MARIA_HA *info);
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my_bool _ma_update_block_record(MARIA_HA *info, MARIA_RECORD_POS pos,
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const uchar *oldrec, const uchar *newrec);
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my_bool _ma_delete_block_record(MARIA_HA *info, const uchar *record);
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int _ma_read_block_record(MARIA_HA *info, uchar *record,
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MARIA_RECORD_POS record_pos);
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int _ma_read_block_record2(MARIA_HA *info, uchar *record,
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uchar *data, uchar *end_of_data);
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int _ma_scan_block_record(MARIA_HA *info, uchar *record,
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MARIA_RECORD_POS, my_bool);
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my_bool _ma_cmp_block_unique(MARIA_HA *info, MARIA_UNIQUEDEF *def,
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const uchar *record, MARIA_RECORD_POS pos);
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my_bool _ma_scan_init_block_record(MARIA_HA *info);
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void _ma_scan_end_block_record(MARIA_HA *info);
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int _ma_scan_remember_block_record(MARIA_HA *info,
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MARIA_RECORD_POS *lastpos);
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void _ma_scan_restore_block_record(MARIA_HA *info,
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MARIA_RECORD_POS lastpos);
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MARIA_RECORD_POS _ma_write_init_block_record(MARIA_HA *info,
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const uchar *record);
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my_bool _ma_write_block_record(MARIA_HA *info, const uchar *record);
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my_bool _ma_write_abort_block_record(MARIA_HA *info);
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my_bool _ma_compare_block_record(register MARIA_HA *info,
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register const uchar *record);
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void _ma_compact_block_page(uchar *buff, uint block_size, uint rownr,
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my_bool extend_block);
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/* ma_bitmap.c */
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my_bool _ma_bitmap_init(MARIA_SHARE *share, File file);
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my_bool _ma_bitmap_end(MARIA_SHARE *share);
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my_bool _ma_bitmap_flush(MARIA_SHARE *share);
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my_bool _ma_bitmap_wait_or_flush(MARIA_SHARE *share);
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my_bool _ma_bitmap_flush_all(MARIA_SHARE *share);
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void _ma_bitmap_reset_cache(MARIA_SHARE *share);
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my_bool _ma_bitmap_find_place(MARIA_HA *info, MARIA_ROW *row,
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MARIA_BITMAP_BLOCKS *result_blocks);
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my_bool _ma_bitmap_release_unused(MARIA_HA *info, MARIA_BITMAP_BLOCKS *blocks);
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my_bool _ma_bitmap_free_full_pages(MARIA_HA *info, const uchar *extents,
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uint count);
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my_bool _ma_bitmap_set(MARIA_HA *info, ulonglong pos, my_bool head,
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uint empty_space);
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my_bool _ma_bitmap_reset_full_page_bits(MARIA_HA *info,
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MARIA_FILE_BITMAP *bitmap,
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ulonglong page, uint page_count);
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my_bool _ma_bitmap_set_full_page_bits(MARIA_HA *info,
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MARIA_FILE_BITMAP *bitmap,
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ulonglong page, uint page_count);
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uint _ma_free_size_to_head_pattern(MARIA_FILE_BITMAP *bitmap, uint size);
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my_bool _ma_bitmap_find_new_place(MARIA_HA *info, MARIA_ROW *new_row,
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ulonglong page, uint free_size,
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MARIA_BITMAP_BLOCKS *result_blocks);
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my_bool _ma_check_bitmap_data(MARIA_HA *info,
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enum en_page_type page_type, ulonglong page,
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uint empty_space, uint *bitmap_pattern);
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my_bool _ma_check_if_right_bitmap_type(MARIA_HA *info,
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enum en_page_type page_type,
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ulonglong page,
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uint *bitmap_pattern);
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uint _ma_bitmap_get_page_bits(MARIA_HA *info, MARIA_FILE_BITMAP *bitmap,
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ulonglong page);
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void _ma_bitmap_delete_all(MARIA_SHARE *share);
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int _ma_bitmap_create_first(MARIA_SHARE *share);
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void _ma_bitmap_flushable(MARIA_HA *info, int non_flushable_inc);
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#ifndef DBUG_OFF
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void _ma_print_bitmap(MARIA_FILE_BITMAP *bitmap, uchar *data,
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ulonglong page);
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#endif
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uint _ma_apply_redo_insert_row_head_or_tail(MARIA_HA *info, LSN lsn,
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uint page_type,
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const uchar *header,
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const uchar *data,
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size_t data_length);
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uint _ma_apply_redo_purge_row_head_or_tail(MARIA_HA *info, LSN lsn,
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uint page_type,
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const uchar *header);
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uint _ma_apply_redo_free_blocks(MARIA_HA *info, LSN lsn,
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const uchar *header);
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uint _ma_apply_redo_free_head_or_tail(MARIA_HA *info, LSN lsn,
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const uchar *header);
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uint _ma_apply_redo_insert_row_blobs(MARIA_HA *info,
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LSN lsn, const uchar *header);
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my_bool _ma_apply_undo_row_insert(MARIA_HA *info, LSN undo_lsn,
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const uchar *header);
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my_bool _ma_apply_undo_row_delete(MARIA_HA *info, LSN undo_lsn,
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const uchar *header, size_t length);
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my_bool _ma_apply_undo_row_update(MARIA_HA *info, LSN undo_lsn,
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const uchar *header, size_t length);
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my_bool write_hook_for_redo(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
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void *hook_arg);
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my_bool write_hook_for_undo(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
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void *hook_arg);
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my_bool write_hook_for_redo_delete_all(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_undo_row_insert(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_undo_row_delete(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_undo_row_update(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info,
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LSN *lsn, void *hook_arg);
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my_bool write_hook_for_file_id(enum translog_record_type type,
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TRN *trn, MARIA_HA *tbl_info, LSN *lsn,
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void *hook_arg);
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