Database Administrator

Transactions are also an important aspect of access to the persistence layer of Hibernate. Hibernate not only provides support for local transactions, but also allows the use of container-managed global transactions. Hibernate has the following

In the previous section, we explained some understanding and concepts of mongodb (see for details). Next, we will step into mongodb learning. Unlike apsaradb for mongodb, which has powerful GUI clients, apsaradb for mongodb also has powerful

FNDLOAD is a Data Synchronization tool officially provided by Oracle. Generally, we use the FNDLOAD tool to download the custom AOL Data of DEV Instance to a text file, then, use FNDLOAD to upload data to the PROD Instance. Under what circumstances

I. installation and configuration 1. Installation Download: wget-c http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.0.6.tgz Unzip: tar zxvf mongodb-linux-x86_64-2.0.6.tgz Establish a soft connection: ln-s mongodb-linux-x86_64-2.0.6

Due to Oracle version problems, the tables exported by 11 GB by default cannot be imported into 10 Gb.The following error is reported:Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0-64bit ProductionWith the Partitioning, OLAP

1. Check the original undo tablespace: Select file_name, bytes/1024/1024 as MB from dba_data_files where tablespace_name like 'undo % '; 2. Create a New undo tablespace: Create undo tablespace undotbs2 datafile

Deploy the Rman backup plan and find the error message in alert. log after execution:Fri Jul 6 00:30:16 2012Errors in file/Oracle/admin/live/udump/***** _ ora_3652.trc:Fri Jul 6 00:30:16 2012Errors in file/oracle/admin/live/udump/***** _

I. Functions of scn The role of Scn is to ensure Database Consistency. It is the internal clock mechanism of Oracle. Scn is an important mechanism for oracle recovery. Scn is everywhere in databases. Generally, the scn value is recorded in control

In the previous encountered ORA-00600 Kcbz_check_objd_typ_3 error, and later found a related implicit parameter through the query information: _ db_block_check_objtypWhether to perform object number and object type check for the definition of this

1. Hbase is a subproject of Hadoop. Download the appropriate Hbase version here. Note: versions of Hadoop and Hbase cannot be used randomly. Therefore, you need to know whether to work together before deploying the service. Otherwise, it will be a

In a join SQL statement in Mysql, The ON Clause syntax format is table1.column _ name = table2.column _ name. When the columns in the pattern design couplet join table adopt the same naming style, you can use the USING syntax to simplify the ON

Overview of temporary tablespace groups In Oracle 10 Gb, you can create multiple temporary tablespaces and form a temporary tablespace group. In this way, you can use multiple temporary tablespaces in the group for sorting, A temporary tablespace

Source: Oracle dba ppt06 Maintaining the Control File1. Learning Objectives1) Explain the use of control files2) List Control File Content3) Diversified Management and control documents4) use OMF to manage control files5) Get Control File

Download Software, version mongodb-linux-x86_64-2.0.2.tgz Directory after decompression: mongodb-linux-x86_64-2.0.2 Then transfer to the/usr/local/mongodb directoryCreate a data storage directory and a log directoryMkdir/usr/local/mongodb/{data,

I have never started linux before. This time, the customer's system installed linux, project release environment and database have been installed. As we were in a hurry to go online, we had to explore and handle it. Write it down for future

After installing the Oracle database, we are going to use the PLSQL Developer Software to connect to the server database! The following describes how to set the software and connect to the oracle database: 1. Download and install PLSQL Developer

I. undo preparation knowledge In the previous article, undo segment is described as follows: Current online Redo and Undo corrupt methods 1.1 When undo_management is set to MENUAL, the SYSTEM rollback segment is used to record undo records to the

We know that MYSQL 5.1 supports horizontal partitioning. Let's try to optimize the query on a partitioned table.In general, the optimization principle is the same as the optimization for individual tables, ensuring that the number of scans on the

1. Restrict access from specific IP addresses. You only need to add the -- bind_ip parameter at startup, and add the -- host parameter at client connection./App/mongo/mongodb/bin/mongod -- dbpath =/app/mongo/mongodb/data/test -- logpath

Under normal circumstances, you can change the user password in Oracle EBS in System administrator> Define user form, but sometimes, you need to change the password more quickly during development or implementation, you can use the script below