數(shù)據(jù)庫(kù)系統(tǒng)概論新技術(shù)篇55講課件

1、第8講開(kāi)源數(shù)據(jù)庫(kù)系統(tǒng)8.1 概述8.2 PostgreSQL的學(xué)習(xí)、使用與定制8.3 PostgreSQL的主題分析An Introduction to Database System8.2PostgreSQL的學(xué)習(xí)、使用與定制8.2.1三步法可用于各種開(kāi)源數(shù)據(jù)庫(kù)的理解、掌握8.2.2總結(jié)An Introduction to Database System三步法v學(xué)習(xí)實(shí)例系統(tǒng)v多層次使用v做的“板凳”An Introduction to Database SystemStep1-學(xué)習(xí)實(shí)例系統(tǒng)vv理解代碼樹生成并安裝系統(tǒng)=靜態(tài)特征=了解進(jìn)程結(jié)構(gòu)運(yùn)行并使用PG=動(dòng)態(tài)特征=學(xué)習(xí)PG系統(tǒng)級(jí)開(kāi)發(fā)的ABC

2、DEvvvAn Introduction to Database System代碼結(jié)構(gòu)backendaccessvPG (source Insight)bootstrapcatalogcommandsexecutorliblibpqmainnodesoptimizerparserpoportpostmasterregexrewritesnowballstoragetcoptsearchutilsAn Introduction to Database System<DIR><DIR><DIR><DIR>config contrib doc srcb

3、ackendbinincludeinterfacesmakefilesplporttemplatetesttimezonetoolstutorial代碼模塊示例服務(wù)器管理器-src/backend/postmaster/vnnnnnnn主nautovacuum.c bgwriter.c pgarch.c pgstat.c postmaster.c syslogger.c walwriter.c-src/backend/main/main.cvv系統(tǒng)實(shí)用工具-src/bin/nninitdb/initdb.cpg_ctl/pg_ctl.cAn Introduction to Database S

4、ystem生成+安裝v閱讀安裝手冊(cè)nPG的手冊(cè)很詳細(xì) - 多個(gè)平臺(tái)v簡(jiǎn)明安裝步驟-Linux/Unix1.2.3.4.5.6.7.8.9.10.11.12./configuremakesumake install adduser postgresmkdir /usr/local/pgsql/datachown postgres /usr/local/pgsql/datasu - postgres/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data/usr/local/pgsql/bin/postgres -D /usr/local/pgsql

5、/data >logfile 2>&1 &/usr/local/pgsql/bin/createdb test/usr/local/pgsql/bin/psql testAn Introduction to Database System進(jìn)程結(jié)構(gòu)v 動(dòng)態(tài)特征n1:1psqlapp1appkautovacuumlauncherstatisticscollectorbgwriter進(jìn)程postmaster(postgres)walwritepostgrespostgrespostgresAn Introduction to Database System系統(tǒng)啟動(dòng)vpos

6、tgres opts1.2.3.4.保存環(huán)境變量設(shè)置本地化檢查命令行參數(shù) 進(jìn)入不同執(zhí)行模式-boot：(bootstrap)初始化數(shù)據(jù)庫(kù)-describe-config：顯示系統(tǒng)配置-single：?jiǎn)斡脩裟Ｊ綀?zhí)行<default>：?jiǎn)?dòng)多用戶模式An Introduction to Database System數(shù)據(jù)庫(kù)創(chuàng)建和初始化v 數(shù)據(jù)庫(kù)初始化n initdbn bootstrap模式：postgres boot n BKI命令：share/postgres.bkiv 思想：如何從無(wú)到有An Introduction to Database System運(yùn)行和維護(hù)-Client

7、Appv 數(shù)據(jù)庫(kù)創(chuàng)建(fromTemplate)n createdb optsn createuser optsv 空間整理(GC)n vacuumdb optsv 數(shù)據(jù)導(dǎo)出/導(dǎo)入(backup)n pg_dump optsn pg_restore optsAn Introduction to Database System學(xué)習(xí)系統(tǒng)級(jí)開(kāi)發(fā)的ABCDEA.B.C.設(shè)計(jì)多進(jìn)程體系多模式運(yùn)行-滿足不同需求充分利用各種工具-sh/awk/perl/bison/flexD.可擴(kuò)展性考慮E.源代碼結(jié)構(gòu)清晰An Introduction to Database SystemStep2-多層次使用v的教學(xué)用D

8、BMS(L1)概論的實(shí)習(xí)系統(tǒng)psql + pg-bennv開(kāi)發(fā)使用數(shù)據(jù)庫(kù)的應(yīng)用系統(tǒng)(L2)nC/S或B/A/Sv個(gè)人代碼倉(cāng)庫(kù)(codestore) (L3)nn典型數(shù)據(jù)結(jié)構(gòu)-list/hash/queue算法案例-memcxt, dynahashAn Introduction to Database SystemStep3-做的“板凳”v 簡(jiǎn)單定制-不同選項(xiàng)的執(zhí)行碼eg. configure -enable-debugv高級(jí)定制-修改元數(shù)據(jù)表1.2.增加built-in 定義-eg. cur_role(某個(gè).c文件)修改系統(tǒng)表-eg. pg_proc(catalog/pg_proc.h)v模塊定制-擴(kuò)展子系統(tǒng)eg. 增強(qiáng)管理器(smgr, storage manager)Magnet disk + SSD + flash + .An Introduction to