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into perch.ndb.mysql.com:/home/jonas/src/51-work storage/ndb/include/kernel/ndb_limits.h: Auto merged storage/ndb/src/kernel/blocks/backup/Backup.cpp: Auto merged storage/ndb/src/kernel/blocks/backup/Backup.hpp: merge
155 lines
4.3 KiB
C
155 lines
4.3 KiB
C
/* Copyright (C) 2003 MySQL AB
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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; either version 2 of the License, or
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(at your option) any later version.
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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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#ifndef NDB_LIMITS_H
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#define NDB_LIMITS_H
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#include <mysql.h>
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#define RNIL 0xffffff00
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/**
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* Note that actual value = MAX_NODES - 1,
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* since NodeId = 0 can not be used
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*/
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#define MAX_NDB_NODES 49
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#define MAX_NODES 64
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#define UNDEF_NODEGROUP 0xFFFF
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/**
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* MAX_API_NODES = MAX_NODES - No of NDB Nodes in use
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*/
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/**
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* The maximum number of replicas in the system
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*/
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#define MAX_REPLICAS 4
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/**
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* The maximum number of local checkpoints stored at a time
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*/
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#define MAX_LCP_STORED 3
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/**
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* The maximum number of log execution rounds at system restart
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*/
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#define MAX_LOG_EXEC 4
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/**
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* The maximum number of tuples per page
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**/
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#define MAX_TUPLES_PER_PAGE 8191
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#define MAX_TUPLES_BITS 13 /* 13 bits = 8191 tuples per page */
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#define MAX_TABLES 20320 /* SchemaFile.hpp */
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#define MAX_TAB_NAME_SIZE 128
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#define MAX_ATTR_NAME_SIZE NAME_LEN /* From mysql_com.h */
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#define MAX_ATTR_DEFAULT_VALUE_SIZE 128
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#define MAX_ATTRIBUTES_IN_TABLE 128
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#define MAX_ATTRIBUTES_IN_INDEX 32
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#define MAX_TUPLE_SIZE_IN_WORDS 2013
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#define MAX_KEY_SIZE_IN_WORDS 1023
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#define MAX_FRM_DATA_SIZE 6000
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#define MAX_NULL_BITS 4096
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#define MAX_FRAGMENT_DATA_BYTES (4+(2 * 8 * MAX_REPLICAS * MAX_NDB_NODES))
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#define MAX_NDB_PARTITIONS 1024
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#define MAX_RANGE_DATA (131072+MAX_NDB_PARTITIONS) //0.5 MByte of list data
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#define MAX_WORDS_META_FILE 16382
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#define MAX_WORDS_META_FILE 24576
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#define MIN_ATTRBUF ((MAX_ATTRIBUTES_IN_TABLE/24) + 1)
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/*
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* Max Number of Records to fetch per SCAN_NEXTREQ in a scan in LQH. The
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* API can order a multiple of this number of records at a time since
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* fragments can be scanned in parallel.
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*/
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#define MAX_PARALLEL_OP_PER_SCAN 992
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/*
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* The default batch size. Configurable parameter.
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*/
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#define DEF_BATCH_SIZE 64
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/*
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* When calculating the number of records sent from LQH in each batch
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* one uses SCAN_BATCH_SIZE divided by the expected size of signals
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* per row. This gives the batch size used for the scan. The NDB API
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* will receive one batch from each node at a time so there has to be
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* some care taken also so that the NDB API is not overloaded with
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* signals.
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* This parameter is configurable, this is the default value.
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*/
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#define SCAN_BATCH_SIZE 32768
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/*
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* To protect the NDB API from overload we also define a maximum total
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* batch size from all nodes. This parameter should most likely be
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* configurable, or dependent on sendBufferSize.
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* This parameter is configurable, this is the default value.
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*/
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#define MAX_SCAN_BATCH_SIZE 262144
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/*
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* Maximum number of Parallel Scan queries on one hash index fragment
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*/
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#define MAX_PARALLEL_SCANS_PER_FRAG 12
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/*
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* Maximum parallel ordered index scans per primary table fragment.
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* Implementation limit is (256 minus 12).
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*/
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#define MAX_PARALLEL_INDEX_SCANS_PER_FRAG 32
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/**
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* Computed defines
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*/
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#define MAXNROFATTRIBUTESINWORDS (MAX_ATTRIBUTES_IN_TABLE / 32)
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/*
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* Ordered index constants. Make configurable per index later.
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*/
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#define MAX_TTREE_NODE_SIZE 64 /* total words in node */
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#define MAX_TTREE_PREF_SIZE 4 /* words in min prefix */
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#define MAX_TTREE_NODE_SLACK 2 /* diff between max and min occupancy */
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/*
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* Blobs.
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*/
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#define NDB_BLOB_HEAD_SIZE 2 /* sizeof(NdbBlob::Head) >> 2 */
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/*
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* Character sets.
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*/
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#define MAX_XFRM_MULTIPLY 8 /* max expansion when normalizing */
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/**
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* Disk data
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*/
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#define MAX_FILES_PER_FILEGROUP 1024
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/**
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* Page size in global page pool
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*/
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#define GLOBAL_PAGE_SIZE 32768
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#define GLOBAL_PAGE_SIZE_WORDS 8192
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/*
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* Long signals
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*/
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#define NDB_SECTION_SEGMENT_SZ 60
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/*
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* Restore Buffer in pages
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* 4M
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*/
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#define LCP_RESTORE_BUFFER (4*32)
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#endif
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