Oracle sharding database的示例分析
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Sharding架构是数据库层面的一种分片技术，可以使分过区的数据分布在各不相同的独立数据库里。Sharding是Oracle Database 12c Release 2的新特性，它能为适合于 Sharding技术的OLTP应用提供线性扩展和完全错误隔离的能力，q 我们可以将 Sharding简单地理解为Oracle 表分区技术的扩展，下面将详细描述安装操作。
1.Oracle Sharding 安装条件
12.2企业版
non-cdb
使用文件系统而非ASM （12.2 Beta要求，正式发行后，可能会改）
主机hosts文件写上本机和各个shard node的IP解析
机器必须全新，不能残留之前有安装过oracle的信息。
2.设置环境变量，创建相关目录与设置内核参数
shardcat和gds都安装在一个主机上，同一个oracle用户，不同ORACLE_HOME。
[oracle12c@sdb1 ~]$ cat .bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/bin export PATH # Oracle Settings TMP=/tmp; export TMP TMPDIR=$TMP; export TMPDIR ORACLE_BASE=/u01/ora12c/app/oracle; export ORACLE_BASE DB_HOME=$ORACLE_BASE/product/12.2.0/db_1; export DB_HOME GSM_HOME=$ORACLE_BASE/product/12.2.0/gsm; export GSM_HOME ORACLE_HOME=$DB_HOME; export ORACLE_HOME ORACLE_SID=shardcat; export ORACLE_SID ORACLE_TERM=xterm; export ORACLE_TERM BASE_PATH=/usr/sbin:$PATH; export BASE_PATH PATH=/usr/sbin:$PATH; export PATH PATH=$ORACLE_HOME/bin:$PATH:$ORACLE_HOME/OPatch; export PATH LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib; export LD_LIBRARY_PATH CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib; export CLASSPATH #LD_ASSUME_KERNEL=2.4.1; export LD_ASSUME_KERNEL
[root@shard1 ~]# groupadd -g 1009 dba [root@shard1 ~]# groupadd -g 1010 oper [root@shard1 ~]# groupadd -g 1011 oinstall [root@shard1 ~]# useradd -u 1001 -g oinstall -G dba,oper oracle [root@shard1 ~]# passwd oracle Changing password for user oracle. New password: BAD PASSWORD: The password is shorter than 8 characters Retype new password: passwd: all authentication tokens updated successfully. [root@shard1 ~]# mkdir -p /u01/app/oraInventory [root@shard1 ~]# chown -R oracle:oinstall /u01/app/oraInventory [root@shard1 ~]# chmod -R 775 /u01/app/oraInventory [root@shard1 ~]# mkdir -p /u01/app/oracle [root@shard1 ~]# chown -R oracle:oinstall /u01/app/oracle [root@shard1 ~]# chmod -R 775 /u01/app/oracle [root@shard1 ~]# mkdir -p /u01/app/oracle/product/12.2.0/db [root@shard1 ~]# chown -R oracle:oinstall /u01/app/oracle/product/12.2.0/db [root@shard1 ~]# chmod -R 775 /u01/app/oracle/product/12.2.0/db [root@shard1 ~]# mkdir /u01/tmp [root@shard1 ~]# chmod a+wr /u01/tmp [root@shard1 ~]# mkdir -p /u01/app/oracle/product/12.2.0/gsm [root@shard1 ~]# chown -R oracle:oinstall /u01/app/oracle/product/12.2.0/gsm [root@shard1 ~]# chmod -R 775 /u01/app/oracle/product/12.2.0/gsm [root@shard1 ~]# su - oracle
[oracle@shard1 ~]$ vi .bash_profile export PATH # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/.local/bin:$HOME/bin export PATH TEMP=/u01/tmp TMPDIR=/u01/tmp export TEMP TMPDIR export LD_ASSUME_KERNEL=3.8.13 export ORACLE_BASE=/u01/app/oracle DB_HOME=/u01/app/oracle/product/12.2.0/db GSM_HOME=/u01/app/oracle/product/12.2.0/gsm export ORACLE_HOME=$DB_HOME export ORACLE_SID=jytest2 export ORACLE_UNQNAME=jytest export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK export ORA_NLS33=$ORACLE_HOME/ocommon/nls/admin/data LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib export LD_LIBRARY_PATH export PATH=$PATH:$ORACLE_HOME/bin CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib CLASSPATH=$CLASSPATH:$ORACLE_HOME/network/jlib export CLASSPATH umask=022 [oracle@shard1 ~]$ alias gsm_env='. /home/oracle/gsm_env' [oracle@shard1 ~]$ alias db_env='. /home/oracle/db_env' [oracle@shard1 ~]$ vi gsm_env ORACLE_HOME=$GSM_HOME; export ORACLE_HOME PATH=$ORACLE_HOME/bin:$BASE_PATH; export PATH [oracle@shard1 ~]$ vi db_env ORACLE_HOME=$DB_HOME; export ORACLE_HOME PATH=$ORACLE_HOME/bin:$BASE_PATH; export PATH
修改内核参数编辑/etc/sysctl.conf文件
[root@shard1 ~]# vi /etc/sysctl.conf # System default settings live in /usr/lib/sysctl.d/00-system.conf. # To override those settings, enter new settings here, or in an /etc/sysctl.d/.conf file # # For more information, see sysctl.conf(5) and sysctl.d(5). fs.aio-max-nr = 1048576 fs.file-max = 6815744 kernel.shmall = 2097152 kernel.shmmax = 4294967295 kernel.shmmni = 4096 kernel.sem = 250 32000 100 128 net.ipv4.ip_local_port_range = 9000 65500 net.core.rmem_default = 262144 net.core.rmem_max = 4194304 net.core.wmem_default = 262144 net.core.wmem_max = 1048576 [root@shard1 ~]# sysctl -p fs.aio-max-nr = 1048576 fs.file-max = 6815744 kernel.shmall = 2097152 kernel.shmmax = 4294967295 kernel.shmmni = 4096 kernel.sem = 250 32000 100 128 net.ipv4.ip_local_port_range = 9000 65500 net.core.rmem_default = 262144 net.core.rmem_max = 4194304 net.core.wmem_default = 262144 net.core.wmem_max = 1048576
修改oarcle参数的shell限制,在所有节点的/etc/security/limits.conf文件中添加以下参数
oracle soft nproc 2047 oracle hard nproc 16384 oracle soft nofile 1024 oracle hard nofile 65536 oracle soft stack 10240 oracle hard stack 32768 oracle soft memlock 3145728 oracle hard memlock 3145728
修改shell的默认参数文件，在所有节点的/etc/profile文件中添加以下内容：
if [ $USER = "oracle" ]; then if [ $SHELL = "/bin/ksh" ]; then ulimit -p 16384 ulimit -n 65536 else ulimit -u 16384 -n 65536 fi fi
3.安装Oracle软件
[root@shard1 soft]# unzip linuxx64_12201_database.zip [root@shard1 soft]# chown -R oracle:oinstall database [root@shard1 Desktop]# xhost + access control disabled, clients can connect from any host [root@shard1 Desktop]# su - oracle Last login: Thu Oct 12 12:01:58 CST 2017 on pts/1 [oracle@shard1 ~]$ export DISPLAY=:1 [oracle@shard1 ~]$ cd /soft/database [oracle@shard1 database]$ ls -lrt total 24 -rwxr-xr-x. 1 oracle oinstall 500 Feb 7 2013 welcome.html drwxr-xr-x. 4 oracle oinstall 4096 Jan 26 2017 install -rwxr-xr-x. 1 oracle oinstall 8771 Jan 26 2017 runInstaller drwxr-xr-x. 2 oracle oinstall 34 Jan 26 2017 rpm drwxrwxr-x. 2 oracle oinstall 28 Jan 26 2017 sshsetup drwxrwxr-x. 2 oracle oinstall 58 Jan 26 2017 response drwxr-xr-x. 14 oracle oinstall 4096 Jan 26 2017 stage [oracle@shard1 database]$ ./runInstaller
[root@shard1 soft]# /u01/app/oraInventory/orainstRoot.sh Changing permissions of /u01/app/oraInventory. Adding read,write permissions for group. Removing read,write,execute permissions for world. Changing groupname of /u01/app/oraInventory to oinstall. The execution of the script is complete. [root@shard1 soft]# /u01/app/oracle/product/12.2.0/db/root.sh Performing root user operation. The following environment variables are set as: ORACLE_OWNER= oracle ORACLE_HOME= /u01/app/oracle/product/12.2.0/db Enter the full pathname of the local bin directory: [/usr/local/bin]: Copying dbhome to /usr/local/bin ... Copying oraenv to /usr/local/bin ... Copying coraenv to /usr/local/bin ... Creating /etc/oratab file... Entries will be added to the /etc/oratab file as needed by Database Configuration Assistant when a database is created Finished running generic part of root script. Now product-specific root actions will be performed. Do you want to setup Oracle Trace File Analyzer (TFA) now ? yes|[no] : yes Installing Oracle Trace File Analyzer (TFA). Log File: /u01/app/oracle/product/12.2.0/db/install/root_shard1_2017-10-12_13-06-02-537061115.log Finished installing Oracle Trace File Analyzer (TFA)
其它两个shard主机shard2,shard3安装Oracle软件的操作不再描述同上。
shard2上的oracle环境变量设置如下,其中ORACLE_SID与
ORACLE_UNQNAME设置为sh2，在后面向shard catalog数据库注册shard时会读取到
[oracle@shard2 ~]$ cat .bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/.local/bin:$HOME/bin export PATH TEMP=/u01/tmp TMPDIR=/u01/tmp export TEMP TMPDIR export LD_ASSUME_KERNEL=3.8.13 export ORACLE_BASE=/u01/app/oracle DB_HOME=/u01/app/oracle/product/12.2.0/db GSM_HOME=/u01/app/oracle/product/12.2.0/gsm export ORACLE_HOME=$DB_HOME export ORACLE_SID=sh2 export ORACLE_UNQNAME=sh2 export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK export ORA_NLS33=$ORACLE_HOME/ocommon/nls/admin/data LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib export LD_LIBRARY_PATH export PATH=$PATH:$ORACLE_HOME/bin CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib CLASSPATH=$CLASSPATH:$ORACLE_HOME/network/jlib export CLASSPATH umask=022
shard3上的oracle环境变量设置如下,其中ORACLE_SID与
ORACLE_UNQNAME设置为sh2，在后面向shard catalog数据库注册shard时会读取到
[oracle@shard3 ~]$ vi .bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/.local/bin:$HOME/bin export PATH TEMP=/u01/tmp TMPDIR=/u01/tmp export TEMP TMPDIR export LD_ASSUME_KERNEL=3.8.13 export ORACLE_BASE=/u01/app/oracle DB_HOME=/u01/app/oracle/product/12.2.0/db GSM_HOME=/u01/app/oracle/product/12.2.0/gsm export ORACLE_HOME=$DB_HOME export ORACLE_SID=sh3 export ORACLE_UNQNAME=sh3 export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK export ORA_NLS33=$ORACLE_HOME/ocommon/nls/admin/data LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib export LD_LIBRARY_PATH export PATH=$PATH:$ORACLE_HOME/bin CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib CLASSPATH=$CLASSPATH:$ORACLE_HOME/network/jlib export CLASSPATH umask=022
4.安装Shard Director Software
[root@shard1 soft]# unzip linuxx64_12201_gsm.zip [root@shard1 Desktop]# xhost + access control disabled, clients can connect from any host [root@shard1 Desktop]# su - oracle Last login: Thu Oct 12 18:05:56 CST 2017 on pts/0 [oracle@shard1 ~]$ export DISPLAY=:1 [oracle@shard1 ~]$ cd /soft/gsm [oracle@shard1 gsm]$ ls -lrt total 24 -rwxrwxr-x. 1 oracle oinstall 500 Feb 7 2013 welcome.html -rwxr-xr-x. 1 oracle oinstall 8772 Jan 26 2017 runInstaller drwxr-xr-x. 4 oracle oinstall 4096 Jan 26 2017 install drwxrwxr-x. 2 oracle oinstall 28 Jan 26 2017 response drwxr-xr-x. 14 oracle oinstall 4096 Jan 26 2017 stage [oracle@shard1 gsm]$ ./runInstaller
[root@shard1 soft]# /u01/app/oracle/product/12.2.0/gsm/root.sh Performing root user operation. The following environment variables are set as: ORACLE_OWNER= oracle ORACLE_HOME= /u01/app/oracle/product/12.2.0/gsm Enter the full pathname of the local bin directory: [/usr/local/bin]: The contents of "dbhome" have not changed. No need to overwrite. The contents of "oraenv" have not changed. No need to overwrite. The contents of "coraenv" have not changed. No need to overwrite. Entries will be added to the /etc/oratab file as needed by Database Configuration Assistant when a database is created Finished running generic part of root script. Now product-specific root actions will be performed.
5.创建shard catalog数据库
运行dbca开始建立数据库实例，这个实例是放分片数据的元数据的。我们把这个实例名叫shardcat。
[root@shard1 Desktop]# xhost + access control disabled, clients can connect from any host [root@shard1 Desktop]# su - oracle Last login: Thu Oct 12 18:35:35 CST 2017 on pts/1 [oracle@shard1 ~]$ export DISPLAY=:1 [oracle@shard1 ~]$ dbca
[oracle@shard1 arch]$ lsnrctl status LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 12-OCT-2017 18:58:06 Copyright (c) 1991, 2016, Oracle. All rights reserved. Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=shard1)(PORT=1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 12.2.0.1.0 - Production Start Date 12-OCT-2017 18:26:22 Uptime 0 days 0 hr. 31 min. 43 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/oracle/product/12.2.0/db/network/admin/listener.ora Listener Log File /u01/app/oracle/diag/tnslsnr/shard1/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=shard1)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Services Summary... Service "shardcat" has 1 instance(s). Instance "shardcat", status READY, has 1 handler(s) for this service... Service "shardcatXDB" has 1 instance(s). Instance "shardcat", status READY, has 1 handler(s) for this service... The command completed successfully
6.设置Oracle Sharding Management and Routing Tier
登录shardcat主机，登录shardcat数据库：--建立tablespace set需要使用omf，所以需要指定db_create_file_dest参数。
[oracle@shard1 ~]$ echo $ORACLE_SID
shardcat
[oracle@shard1 ~]$ sqlplus / as sysdba
SQL*Plus: Release 12.2.0.1.0 Production on Thu Oct 12 19:01:30 2017
Copyright (c) 1982, 2016, Oracle. All rights reserved.
Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
SQL> alter system set db_create_file_dest='/u01/app/oracle/oradata' scope=both;
System altered.
SQL> alter system set open_links=16 scope=spfile;
System altered.
SQL> alter system set open_links_per_instance=16 scope=spfile;
System altered.
SQL> startup force
ORACLE instance started.
Total System Global Area 2147483648 bytes
Fixed Size 8622776 bytes
Variable Size 620760392 bytes
Database Buffers 1509949440 bytes
Redo Buffers 8151040 bytes
Database mounted.
Database opened.
SQL> alter user gsmcatuser account unlock;
User altered.
SQL> alter user gsmcatuser identified by oracle;
User altered.
SQL> create user mygdsadmin identified by oracle;
User created.
SQL> grant connect, create session, gsmadmin_role to mygdsadmin;
Grant succeeded.
SQL> grant inherit privileges on user SYS to GSMADMIN_INTERNAL;
Grant succeeded.
（update 2016-11-10 注：在12.2. beta 2后可以不做这步）
SQL> alter system set events 'immediate trace name GWM_TRACE level 7';
System altered.
（update 2016-11-10 注：在12.2. beta 2后可以不做这步）
SQL> alter system set event='10798 trace name context forever, level 7' scope=spfile;
System altered.
SQL> execute dbms_xdb.sethttpport(8080);
PL/SQL procedure successfully completed.
SQL> commit;
Commit complete.
SQL> @?/rdbms/admin/prvtrsch.plb
PL/SQL procedure successfully completed.
Session altered.
PL/SQL procedure successfully completed.
PL/SQL procedure successfully completed.
Session altered.
Session altered.
Package created.
No errors.
Grant succeeded.
Session altered.
Session altered.
Package body created.
No errors.
Session altered.
Session altered.
Procedure created.
No errors.
Function created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Procedure created.
No errors.
Audit policy altered.
1 row updated.
Commit complete.
Session altered.
PL/SQL procedure successfully completed.
SQL> exec DBMS_SCHEDULER.SET_AGENT_REGISTRATION_PASS('oracle');
PL/SQL procedure successfully completed.
SQL> startup force
ORACLE instance started.
Total System Global Area 2147483648 bytes
Fixed Size 8622776 bytes
Variable Size 620760392 bytes
Database Buffers 1509949440 bytes
Redo Buffers 8151040 bytes
Database mounted.
Database opened.在所有的shard节点分别执行Agent注册
登录shard2主机：
[oracle@shard2 ~]$ schagent -start Scheduler agent started using port 65121 [oracle@shard2 ~]$ schagent status Agent running with PID 12078 Agent_version:12.2.0.1.2 Running_time:00:00:10 Total_jobs_run:0 Running_jobs:0 Platform:Linux ORACLE_HOME:/u01/app/oracle/product/12.2.0/db ORACLE_BASE:/u01/app/oracle Port:65121 Host:shard2 [oracle@shard2 ~]$ echo oracle|schagent -registerdatabase shard1 8080 Agent Registration Password ? Oracle Scheduler Agent Registration for 12.2.0.1.2 Agent Agent Registration Successful! [oracle@shard2 ~]$ mkdir -p /u01/app/oracle/oradata [oracle@shard2 ~]$ mkdir -p /u01/app/oracle/fast_recovery_area
登录shard3主机：
[oracle@shard3 ~]$ source .bash_profile [oracle@shard3 ~]$ schagent -start Scheduler agent started using port 35374 [oracle@shard3 ~]$ schagent -status Agent running with PID 13019 Agent_version:12.2.0.1.2 Running_time:00:00:07 Total_jobs_run:0 Running_jobs:0 Platform:Linux ORACLE_HOME:/u01/app/oracle/product/12.2.0/db ORACLE_BASE:/u01/app/oracle Port:35374 Host:shard3 [oracle@shard3 ~]$ echo oracle|schagent -registerdatabase shard1 8080 Agent Registration Password ? Oracle Scheduler Agent Registration for 12.2.0.1.2 Agent Agent Registration Successful! [oracle@shard3 ~]$ mkdir -p /u01/app/oracle/oradata [oracle@shard3 ~]$ mkdir -p /u01/app/oracle/fast_recovery_area
7.Deploying and Managing a System-Managed SDB
我们开始部署，以最简单的System-Managed SDB为例。
另外，admin guide中介绍的是4台主机做shard node，其中每2台互为dataguard主备。我们这边为了节约空间和资源，不搞dataguard了，只建立primary库。因此只要2台主机做shard node。先设置gsm的环境变量
进入到GDSCTL命令行，创建shard catalog。
[oracle@shard1 ~]$ export ORACLE_BASE=/u01/app/oracle [oracle@shard1 ~]$ export ORACLE_HOME=/u01/app/oracle/product/12.2.0/gsm [oracle@shard1 ~]$ export PATH=/u01/app/oracle/product/12.2.0/gsm/bin:$PATH:$HOME/bin [oracle@shard1 ~]$ gdsctl GDSCTL: Version 12.2.0.1.0 - Production on Thu Oct 12 19:24:36 CST 2017 Copyright (c) 2011, 2016, Oracle. All rights reserved. Welcome to GDSCTL, type "help" for information. Warning: current GSM name is not set automatically because gsm.ora contains zero or several GSM entries. Use "set gsm" command to set GSM for the session. Current GSM is set to GSMORA GDSCTL> GDSCTL>create shardcatalog -database shard1:1521:shardcat -chunks 12 -user mygdsadmin/oracle -sdb shardcat -region region1 -agent_port 8080 -agent_password oracle Catalog is created 创建和启动shard director. 参数含义： -gsm: 指定shard director名称 -listener: 指定shard director的监听端口，注意不能与数据库的listener端口冲突 -catalog: 指定catalog database 信息，catalog数据库的主机名:监听器port: catalog 数据库db_name GDSCTL>add gsm -gsm sharddirector1 -listener 1571 -pwd oracle -catalog shard1:1521:shardcat -region region1 GSM successfully added GDSCTL>start gsm -gsm sharddirector1 GSM is started successfully 添加操作系统认证. GDSCTL>add credential -credential oracle_cred -osaccount oracle -ospassword oracle The operation completed successfully
开始布署SharedDatabase。本例将布署System-ManagedSDB。
部署system-managed SDB
1.连接到shard director/GSM服务器(shard1)
[oracle@shard1 ~]$ export ORACLE_BASE=/u01/app/oracle [oracle@shard1 ~]$ export ORACLE_HOME=/u01/app/oracle/product/12.2.0/gsm [oracle@shard1 ~]$ export PATH=/u01/app/oracle/product/12.2.0/gsm/bin:$PATH:$HOME/bin [oracle@shard1 ~]$ gdsctl GDSCTL: Version 12.2.0.1.0 - Production on Thu Oct 12 19:35:21 CST 2017 Copyright (c) 2011, 2016, Oracle. All rights reserved. Welcome to GDSCTL, type "help" for information. Current GSM is set to SHARDDIRECTOR1
设置当前session为sharddirector1 shard director
GDSCTL>set gsm -gsm sharddirector1 GDSCTL>connect mygdsadmin/oracle Catalog connection is established
添加shardgroup， shardgroup是一组shard的集合，shardgroup名称为primary_shardgroup，-deploy_as primary表示这个group中的shard都是主库。
GDSCTL>add shardgroup -shardgroup primary_shardgroup -deploy_as primary -region region1 The operation completed successfully 将每个shard地址添加到catalog的valid node checking for registration (VNCR)列表，并且创建shard GDSCTL>add invitednode shard2 GDSCTL>create shard -shardgroup primary_shardgroup -destination shard2 -credential oracle_cred The operation completed successfully DB Unique Name: sh2 GDSCTL>add invitednode shard3 GDSCTL>create shard -shardgroup primary_shardgroup -destination shard3 -credential oracle_cred The operation completed successfully DB Unique Name: sh3
检查配置
GDSCTL>config Regions ------------------------ region1 GSMs ------------------------ sharddirector1 Sharded Database ------------------------ shardcat Databases ------------------------ sh2 sh3 Shard Groups ------------------------ primary_shardgroup Shard spaces ------------------------ shardspaceora Services ------------------------ GDSCTL pending requests ------------------------ Command Object Status ------- ------ ------ Global properties ------------------------ Name: oradbcloud Master GSM: sharddirector1 DDL sequence #: 0 GDSCTL>config shardspace Shard space Chunks ----------- ------ shardspaceora 12 GDSCTL>config shardgroup Shard Group Chunks Region Shard space ----------- ------ ------ ----------- primary_shardgroup 12 region1 shardspaceora GDSCTL>config vncr Name Group ID ---- -------- shard2 shard3 10.138.130.180 GDSCTL>config shard Name Shard Group Status State Region Availability ---- ----------- ------ ----- ------ ------------ sh2 primary_shardgroup U none region1 - sh3 primary_shardgroup U none region1 -
部署deploy
Shard数据库部署过程采用静默安装方式。
GDSCTL>deploy
此时，就开始部署shard了。在shard node上的agent会自动的调用netca和dbca，创建listener和database，2个shard node的操作是并行进行的。（如果是有datauard，那么是先建立一对主备，再建立另一对主备。）你可以在分别是两个shard node上ps -ef|grep ora_ 看到已经有sh2和sh3的实例了。我们可以执行在shard2与shard3上执行ps -ef | grep dbca与lsnrctl status,ps -ef | grep pmon来检查。
[root@shard2 ~]# ps -ef | grep dbca oracle 20437 20429 99 19:49 pts/0 00:00:19 /u01/app/oracle/product/12.2.0/db/jdk/jre/bin/java -Doracle.installer.not_bootstrap=true -DCV_HOME=/u01/app/oracle/product/12.2.0/db -DORACLE_HOME=/u01/app/oracle/product/12.2.0/db -XX:-OmitStackTraceInFastThrow -XX:CompileCommand=quiet -XX:CompileCommand=exclude,javax/swing/text/GlyphView,getBreakSpot -DSET_LAF= -Dsun.java2d.font.DisableAlgorithmicStyles=true -Dice.pilots.html4.ignoreNonGenericFonts=true -DDISPLAY= -DJDBC_PROTOCOL=thin -mx512m -classpath /u01/app/oracle/product/12.2.0/db/assistants/dbca/jlib/dbca.jar:/u01/app/oracle/product/12.2.0/db/assistants/dbca/jlib/dbcaext.jar:/u01/app/oracle/product/12.2.0/db/assistants/jlib/assistantsCommon.jar:/u01/app/oracle/product/12.2.0/db/assistants/jlib/rconfig.jar:/u01/app/oracle/product/12.2.0/db/assistants/jlib/asstcommonext.jar:/u01/app/oracle/product/12.2.0/db/oui/jlib/OraInstaller.jar:/u01/app/oracle/product/12.2.0/db/oui/jlib/OraPrereq.jar:/u01/app/oracle/product/12.2.0/db/inventory/prereqs/oui/OraPrereqChecks.jar:/u01/app/oracle/product/12.2.0/db/oui/jlib/OraPrereqChecks.jar:/u01/app/oracle/product/12.2.0/db/oui/jlib/OraCheckPoint.jar:/u01/app/oracle/product/12.2.0/db/jlib/cvu.jar:/u01/app/oracle/product/12.2.0/db/install/jlib/installcommons_1.0.0b.jar:/u01/app/oracle/product/12.2.0/db/oui/jlib/jewt4.jar:/u01/app/oracle/product/12.2.0/db/oui/jlib/ssh.jar:/u01/app/oracle/product/12.2.0/db/jlib/ewt3.jar:/u01/app/oracle/product/12.2.0/db/jlib/ewtcompat-3_3_15.jar:/u01/app/oracle/product/12.2.0/db/jlib/share.jar:/u01/app/oracle/product/12.2.0/db/jlib/help4.jar:/u01/app/oracle/product/12.2.0/db/oui/jlib/jewt4.jar:/u01/app/oracle/product/12.2.0/db/jlib/oracle_ice.jar:/u01/app/oracle/product/12.2.0/db/jlib/kodiak.jar:/u01/app/oracle/product/12.2.0/db/lib/xmlparserv2.jar:/u01/app/oracle/product/12.2.0/db/jlib/orai18n.jar:/u01/app/oracle/product/12.2.0/db/jlib/ldapjclnt12.jar:/u01/app/oracle/product/12.2.0/db/jlib/netcfg.jar:/u01/app/oracle/product/12.2.0/db/jlib/ojmisc.jar:/u01/app/oracle/product/12.2.0/db/jlib/oraclepki.jar:/u01/app/oracle/product/12.2.0/db/jlib/opm.jar:/u01/app/oracle/product/12.2.0/db/jdbc/lib/ojdbc8.jar:/u01/app/oracle/product/12.2.0/db/jlib/srvm.jar:/u01/app/oracle/product/12.2.0/db/jlib/srvmhas.jar:/u01/app/oracle/product/12.2.0/db/jlib/srvmasm.jar:/u01/app/oracle/product/12.2.0/db/dv/jlib/dvca.jar:/u01/app/oracle/product/12.2.0/db/jlib/gns.jar:/u01/app/oracle/product/12.2.0/db/jlib/commons-compress-1.8.jar oracle.assistants.dbca.driver.DBConfigurator -silent -responseFile /u01/app/oracle/product/12.2.0/db/shard_sh2_dbca.rsp -createDatabase -gdbName sh2 -sid sh2 -initparams db_unique_name=sh2,db_name=sh2,db_domain= -templateName /u01/app/oracle/product/12.2.0/db/shard_sh2_template.dbt -customscripts /u01/app/oracle/product/12.2.0/db/shard_sh2_postCR.sql -listeners LISTENER_sh2 root 20881 12186 0 19:49 pts/1 00:00:00 grep --color=auto dbca [oracle@shard2 ~]$ lsnrctl status LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 12-OCT-2017 19:56:01 Copyright (c) 1991, 2016, Oracle. All rights reserved. Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521)) STATUS of the LISTENER ------------------------ Alias LISTENER_sh2 Version TNSLSNR for Linux: Version 12.2.0.1.0 - Production Start Date 12-OCT-2017 19:48:45 Uptime 0 days 0 hr. 7 min. 18 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/oracle/product/12.2.0/db/network/admin/listener.ora Listener Log File /u01/app/oracle/diag/tnslsnr/shard2/listener_sh2/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=shard2)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Services Summary... Service "sh2" has 1 instance(s). Instance "sh2", status RESTRICTED, has 1 handler(s) for this service... Service "sh2_DGMGRL" has 1 instance(s). Instance "sh2", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully [oracle@shard2 ~]$ ps -ef | grep pmon oracle 22086 1 0 19:54 ? 00:00:00 ora_pmon_sh2 oracle 22982 5293 0 19:56 pts/0 00:00:00 grep --color=auto pmon
GDSCTL>deploy deploy: examining configuration... deploy: deploying primary shard 'sh2' ... deploy: network listener configuration successful at destination 'shard2' deploy: starting DBCA at destination 'shard2' to create primary shard 'sh2' ... deploy: deploying primary shard 'sh3' ... deploy: network listener configuration successful at destination 'shard3' deploy: starting DBCA at destination 'shard3' to create primary shard 'sh3' ... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: waiting for 2 DBCA primary creation job(s) to complete... deploy: DBCA primary creation job succeeded at destination 'shard2' for shard 'sh2' deploy: waiting for 1 DBCA primary creation job(s) to complete... deploy: DBCA primary creation job succeeded at destination 'shard3' for shard 'sh3' deploy: requesting Data Guard configuration on shards via GSM deploy: shards configured successfully The operation completed successfully
我们可以检查一下shard的情况了：
GDSCTL>config shard Name Shard Group Status State Region Availability ---- ----------- ------ ----- ------ ------------ sh2 primary_shardgroup Ok Deployed region1 ONLINE sh3 primary_shardgroup Ok Deployed region1 ONLINE GDSCTL>databases Database: "sh2" Registered: Y State: Ok ONS: N. Role: PRIMARY Instances: 1 Region: region1 Registered instances: shardcat%1 Database: "sh3" Registered: Y State: Ok ONS: N. Role: PRIMARY Instances: 1 Region: region1 Registered instances: shardcat%11 GDSCTL>config shard -shard sh2 Name: sh2 Shard Group: primary_shardgroup Status: Ok State: Deployed Region: region1 Connection string: shard2:1521/sh2:dedicated SCAN address: ONS remote port: 0 Disk Threshold, ms: 20 CPU Threshold, %: 75 Version: 12.2.0.0 Failed DDL: DDL Error: --- Failed DDL id: Availability: ONLINE Rack: Supported services ------------------------ Name Preferred Status ---- --------- ------ GDSCTL>config shard -shard sh3 Name: sh3 Shard Group: primary_shardgroup Status: Ok State: Deployed Region: region1 Connection string: shard3:1521/sh3:dedicated SCAN address: ONS remote port: 0 Disk Threshold, ms: 20 CPU Threshold, %: 75 Version: 12.2.0.0 Failed DDL: DDL Error: --- Failed DDL id: Availability: ONLINE Rack: Supported services ------------------------ Name Preferred Status ---- --------- ------
创建service
GDSCTL>add service -service oltp_rw_srvc -role primary The operation completed successfully GDSCTL>start service -service oltp_rw_srvc The operation completed successfully GDSCTL>status service Service "oltp_rw_srvc.shardcat.oradbcloud" has 2 instance(s). Affinity: ANYWHERE Instance "shardcat%1", name: "sh2", db: "sh2", region: "region1", status: ready. Instance "shardcat%11", name: "sh3", db: "sh3", region: "region1", status: ready.
(其实这个service，用于adg的主备切换后，这个service漂移到备库上)
创建用户和对象
1. 在catalog数据库中创建业务用户
[oracle@shard2 ~]$ sqlplus / as sysdba SQL*Plus: Release 12.2.0.1.0 Production on Fri Oct 13 13:24:45 2017 Copyright (c) 1982, 2016, Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production SQL> alter session enable shard ddl; Session altered. SQL> create user app_schema identified by oracle; User created. SQL> grant all privileges to app_schema; Grant succeeded. SQL> grant gsmadmin_role to app_schema; Grant succeeded. SQL> grant select_catalog_role to app_schema; Grant succeeded. SQL> grant connect, resource to app_schema; Grant succeeded. SQL> grant dba to app_schema; Grant succeeded. SQL> grant execute on dbms_crypto to app_schema; Grant succeeded.
2. 利用应用用户登录,创建表空间集合
SQL> conn app_schema/oracle Connected. SQL> alter session enable shard ddl; Session altered. SQL> create tablespace set tsp_set_1 using template (datafile size 100m autoextend on next 10m maxsize unlimited extent management local segment space management auto); Tablespace created.
3. 为duplicated tables创建表空间，这个测试中duplicated table是Products table.
SQL> create tablespace products_tsp datafile size 100m autoextend on next 10m maxsize unlimited extent management local uniform size 1m; Tablespace created.
4. 创建shard表
SQL> create sharded table customers 2 ( 3 custid varchar2(60) not null, 4 firstname varchar2(60), 5 lastname varchar2(60), 6 class varchar2(10), 7 geo varchar2(8), 8 custprofile varchar2(4000), 9 passwd raw(60), 10 constraint pk_customers primary key (custid), 11 constraint json_customers check (custprofile is json) 12 ) tablespace set tsp_set_1 13 partition by consistent hash (custid) partitions auto; Table created. SQL> create sharded table orders 2 ( 3 orderid integer not null, 4 custid varchar2(60) not null, 5 orderdate timestamp not null, 6 sumtotal number(19,4), 7 status char(4), 8 constraint pk_orders primary key (custid, orderid), 9 constraint fk_orders_parent foreign key (custid) 10 references customers on delete cascade 11 ) partition by reference (fk_orders_parent); Table created.
5.为orders表的orderid列创建序列
SQL> create sequence orders_seq; Sequence created.
6. 创建SHARDED TABLE LineItems
SQL> create sharded table lineitems 2 ( 3 orderid integer not null, 4 custid varchar2(60) not null, 5 productid integer not null, 6 price number(19,4), 7 qty number, 8 constraint pk_items primary key (custid, orderid, productid), 9 constraint fk_items_parent foreign key (custid, orderid) 10 references orders on delete cascade 11 ) partition by reference (fk_items_parent); Table created.
7. 创建duplicated tables.
SQL> create duplicated table products 2 ( 3 productid integer generated by default as identity primary key, 4 name varchar2(128), 5 descruri varchar2(128), 6 lastprice number(19,4) 7 ) tablespace products_tsp; Table created.
8. 创建function，目的是为了后面的DEMO：
SQL> create or replace function passwcreate(passw in raw) 2 return raw 3 is 4 salt raw(8); 5 begin 6 salt := dbms_crypto.randombytes(8); 7 return utl_raw.concat(salt, dbms_crypto.hash(utl_raw.concat(salt, 8 passw), dbms_crypto.hash_sh356)); 9 end; 10 / Function created. SQL> create or replace function passwcheck(passw in raw, phash in raw) 2 return integer is 3 begin 4 return utl_raw.compare( 5 dbms_crypto.hash(utl_raw.concat(utl_raw.substr(phash, 1, 8), 6 passw), dbms_crypto.hash_sh356), 7 utl_raw.substr(phash, 9)); 8 end; 9 / Function created.
GDSCTL>connect mygdsadmin/oracle
Catalog connection is established
GDSCTL>show ddl
id DDL Text Failed shards
-- -------- -------------
7 grant execute on dbms_crypto to app_s...
8 create tablespace set tsp_set_1 using...
9 create tablespace products_tsp datafi...
10 create sharded table customers ( ...
11 create sharded table orders ( orde...
12 create sequence orders_seq
13 create sharded table lineitems ( o...
14 CREATE MATERIALIZED VIEW "APP_SCHEMA"...
15 create or replace function passwcreat...
16 create or replace function passwcheck...
10. 检查每个shard是否有DDL错误
GDSCTL>config shard -shard sh2 Name: sh2 Shard Group: primary_shardgroup Status: Ok State: Deployed Region: region1 Connection string: shard2:1521/sh2:dedicated SCAN address: ONS remote port: 0 Disk Threshold, ms: 20 CPU Threshold, %: 75 Version: 12.2.0.0 Failed DDL: DDL Error: --- 没有DDL错误 Failed DDL id: Availability: ONLINE Rack: Supported services ------------------------ Name Preferred Status ---- --------- ------ oltp_rw_srvc Yes Enabled GDSCTL>config shard -shard sh3 Name: sh3 Shard Group: primary_shardgroup Status: Ok State: Deployed Region: region1 Connection string: shard3:1521/sh3:dedicated SCAN address: ONS remote port: 0 Disk Threshold, ms: 20 CPU Threshold, %: 75 Version: 12.2.0.0 Failed DDL: DDL Error: --- 没有DDL错误 Failed DDL id: Availability: ONLINE Rack: Supported services ------------------------ Name Preferred Status ---- --------- ------ oltp_rw_srvc Yes Enabled
验证环境-表空间/chunks
1. 在gsm(shard1)节点，检查chunks信息
前面创建shardcatalog时指定chunks为12，因此后续创建shard table分配12个chunks
GDSCTL>config chunks Chunks ------------------------ Database From To -------- ---- -- sh2 1 6 sh3 7 12 SQL> select TABLESPACE_NAME, BYTES/1024/1024 MB from sys.dba_data_files order by tablespace_name; TABLESPACE_NAME MB ------------------------------------------------------------ ---------- PRODUCTS_TSP 100 SYSAUX 520 SYSTEM 810 TSP_SET_1 100 UNDOTBS1 70 USERS 5 6 rows selected. SQL> select table_name, partition_name, tablespace_name from dba_tab_partitions where tablespace_name like 'C%TSP_SET_1' order by tablespace_name; no rows selected SQL> col TABLE_NAME for a20 SQL> col PARTITION_NAME for a20 SQL> col TABLESPACE_NAME for a20 SQL> select table_name, partition_name, tablespace_name from dba_tab_partitions where tablespace_name like '%SET%'; TABLE_NAME PARTITION_NAME TABLESPACE_NAME -------------------- -------------------- -------------------- CUSTOMERS CUSTOMERS_P1 TSP_SET_1 ORDERS CUSTOMERS_P1 TSP_SET_1 LINEITEMS CUSTOMERS_P1 TSP_SET_1 SQL> select TABLESPACE_NAME, BYTES/1024/1024 MB from sys.dba_data_files; TABLESPACE_NAME MB -------------------- ---------- SYSTEM 810 SYSAUX 520 UNDOTBS1 70 USERS 5 TSP_SET_1 100 PRODUCTS_TSP 100 6 rows selected. SQL> select a.name Shard, count( b.chunk_number) Number_of_Chunks from gsmadmin_internal.database a, gsmadmin_internal.chunk_loc b where a.database_num=b.database_num group by a.name; SHARD NUMBER_OF_CHUNKS ------------------------------------------------------------ ---------------- sh2 6 sh3 6
2. 在shard2节点检查表空间和chunks信息
--表空间
[oracle@shard2 ~]$ sqlplus / as sysdba SQL*Plus: Release 12.2.0.1.0 Production on Fri Oct 13 16:25:30 2017 Copyright (c) 1982, 2016, Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production SQL> select TABLESPACE_NAME, BYTES/1024/1024 MB from sys.dba_data_files order by tablespace_name; TABLESPACE_NAME MB ------------------------------------------------------------ ---------- C001TSP_SET_1 100 C002TSP_SET_1 100 C003TSP_SET_1 100 C004TSP_SET_1 100 C005TSP_SET_1 100 C006TSP_SET_1 100 PRODUCTS_TSP 100 SYSAUX 520 SYSTEM 810 TSP_SET_1 100 UNDOTBS1 70 USERS 5 12 rows selected.
创建了6个表空间，分别是C001TSP_SET_1 ~ 表空间C006TSP_SET_1，因为设置chunks=12，每个shard有6个chunks。每个表空间有一个datafile，大小是100M，这个是在创建tablespace set时设置的datafile 100M。
--检查chunks
SQL> set linesize 140 SQL> column table_name format a20 SQL> column tablespace_name format a20 SQL> column partition_name format a20 SQL> show parameter db_unique_name NAME TYPE VALUE ------------------------------------ ---------------------- ------------------------------ db_unique_name string sh2 SQL> select table_name, partition_name, tablespace_name from dba_tab_partitions where tablespace_name like 'C%TSP_SET_1' order by tablespace_name; TABLE_NAME PARTITION_NAME TABLESPACE_NAME -------------------- -------------------- -------------------- LINEITEMS CUSTOMERS_P1 C001TSP_SET_1 CUSTOMERS CUSTOMERS_P1 C001TSP_SET_1 ORDERS CUSTOMERS_P1 C001TSP_SET_1 CUSTOMERS CUSTOMERS_P2 C002TSP_SET_1 ORDERS CUSTOMERS_P2 C002TSP_SET_1 LINEITEMS CUSTOMERS_P2 C002TSP_SET_1 CUSTOMERS CUSTOMERS_P3 C003TSP_SET_1 LINEITEMS CUSTOMERS_P3 C003TSP_SET_1 ORDERS CUSTOMERS_P3 C003TSP_SET_1 LINEITEMS CUSTOMERS_P4 C004TSP_SET_1 CUSTOMERS CUSTOMERS_P4 C004TSP_SET_1 ORDERS CUSTOMERS_P4 C004TSP_SET_1 CUSTOMERS CUSTOMERS_P5 C005TSP_SET_1 ORDERS CUSTOMERS_P5 C005TSP_SET_1 LINEITEMS CUSTOMERS_P5 C005TSP_SET_1 CUSTOMERS CUSTOMERS_P6 C006TSP_SET_1 ORDERS CUSTOMERS_P6 C006TSP_SET_1 LINEITEMS CUSTOMERS_P6 C006TSP_SET_1 18 rows selected.
4. 在catalog数据库检查chunks信息
SQL> set echo off SQL> select a.name Shard, count( b.chunk_number) Number_of_Chunks from gsmadmin_internal.database a, gsmadmin_internal.chunk_loc b where a.database_num=b.database_num group by a.name; SHARD NUMBER_OF_CHUNKS ------------------------------------------------------------ ---------------- sh2 6 sh3 6
5. 验证环境-tables
--catalog数据库
SQL> conn app_schema/oracle Connected. SQL> select table_name from user_tables; TABLE_NAME -------------------- CUSTOMERS ORDERS LINEITEMS PRODUCTS MLOG$_PRODUCTS RUPD$_PRODUCTS 6 rows selected.
--shard节点shard2和shard3
[oracle@shard2 ~]$ sqlplus / as sysdba SQL*Plus: Release 12.2.0.1.0 Production on Fri Oct 13 16:36:12 2017 Copyright (c) 1982, 2016, Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production SQL> conn app_schema/oracle Connected. SQL> select table_name from user_tables; TABLE_NAME -------------------------------------------------------------------------------- CUSTOMERS ORDERS LINEITEMS PRODUCTS [oracle@shard3 ~]$ sqlplus / as sysdba SQL*Plus: Release 12.2.0.1.0 Production on Fri Oct 13 16:36:06 2017 Copyright (c) 1982, 2016, Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production SQL> conn app_schema/oracle Connected. SQL> select table_name from user_tables; TABLE_NAME -------------------------------------------------------------------------------- CUSTOMERS ORDERS LINEITEMS PRODUCTS
--插入数据
SQL> INSERT INTO Customers (CustId, FirstName, LastName, CustProfile,
2 Class, Geo, Passwd) VALUES ('james.parker@x.bogus', 'James', 'Parker',
3 NULL, 'Gold', 'east', hextoraw('8d1c00e'));
1 row created.
SQL> commit;
Commit complete.
SQL> set termout on
SQL> set linesize 120
SQL> set echo on
SQL> column firstname format a20
SQL> column lastname format a20
SQL> explain plan for SELECT FirstName,LastName, geo, class FROM Customers;
Explained.
SQL> select plan_table_output from table(DBMS_XPLAN.DISPLAY());
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------
Plan hash value: 2953441084
--------------------------------------------------------------
| Id | Operation | Name | Cost (%CPU)| Inst |IN-OUT|
--------------------------------------------------------------
| 0 | SELECT STATEMENT | | 0 (0)| | |
| 1 | SHARD ITERATOR | | | | |
| 2 | REMOTE | | | ORA_S~ | R->S |
--------------------------------------------------------------
Remote SQL Information (identified by operation id):
PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------
2 - EXPLAIN PLAN INTO PLAN_TABLE@! FOR SELECT
"A1"."FIRSTNAME","A1"."LASTNAME","A1"."GEO","A1"."CLASS" FROM
"CUSTOMERS" "A1" /* coord_sql_id=9j0dws979r7rr */ (accessing
'ORA_SHARD_POOL@ORA_MULTI_TARGET' )
18 rows selected.以上是“Oracle sharding database的示例分析”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注蜗牛博客行业资讯频道！
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