IT 21003 Database Administration
... Fast method to move tablespaces from one database to another Both databases must be compatible and on the same ...
... Fast method to move tablespaces from one database to another Both databases must be compatible and on the same ...
MySQL: Part II - Oxford University ICT Forum
... can show all fields as #DELETED (use TIMESTAMP) • ‘Find first’ operation can be very slow • Transaction support and roll-back recently added • No direct OLE support, but simple work around available ...
... can show all fields as #DELETED (use TIMESTAMP) • ‘Find first’ operation can be very slow • Transaction support and roll-back recently added • No direct OLE support, but simple work around available ...
A New Technique to Backup and Restore DBMS using XML
... the database is 300 G.B., do we backup the whole DBMS in After choosing the articles, the backup file will be saved as order to restore later one table? How much time/space this an XML document for its simplicity and reliability. consume? On the other hand, most companies, and due to the different I ...
... the database is 300 G.B., do we backup the whole DBMS in After choosing the articles, the backup file will be saved as order to restore later one table? How much time/space this an XML document for its simplicity and reliability. consume? On the other hand, most companies, and due to the different I ...
PGS99
... ta will be committed or aborted. The exact moment this happens depends on how the termination protocol is implemented, and will be discussed in Section 4. ...
... ta will be committed or aborted. The exact moment this happens depends on how the termination protocol is implemented, and will be discussed in Section 4. ...
distributed_db_arch
... handled fairly easily Oracle 9i : Oracle 8i – differences slight Oracle 9i : SQL Server – same underlying relational model, different syntax in places Oracle 9i : Objectivity – object-relational (SQL-1999) to ODMG, different underlying model. ...
... handled fairly easily Oracle 9i : Oracle 8i – differences slight Oracle 9i : SQL Server – same underlying relational model, different syntax in places Oracle 9i : Objectivity – object-relational (SQL-1999) to ODMG, different underlying model. ...
Chapter 19
... Vector space model: define an n-dimensional space, where n is the number of words in the document set. Vector for document d goes from origin to a point whose i th coordinate is TF (d,t ) / n (t ) The cosine of the angle between the vectors of two documents is used as a measure of their similari ...
... Vector space model: define an n-dimensional space, where n is the number of words in the document set. Vector for document d goes from origin to a point whose i th coordinate is TF (d,t ) / n (t ) The cosine of the angle between the vectors of two documents is used as a measure of their similari ...
Review 1
... For this merge, 5 will be taken as a key value in A since any key value in B is less than or equal to 5 but any key value in C is larger than 5. Sept. 2009 ...
... For this merge, 5 will be taken as a key value in A since any key value in B is less than or equal to 5 but any key value in C is larger than 5. Sept. 2009 ...
Integrating Workload Replays into Database Change
... So how can a DBA reasonably ensure that the before and after user experience remains the same? You cannot simply say that the above conditions were unavoidable and hence we’ll simply have to live with the results. Nor can you postpone, prevent or otherwise significantly affect many of the above issu ...
... So how can a DBA reasonably ensure that the before and after user experience remains the same? You cannot simply say that the above conditions were unavoidable and hence we’ll simply have to live with the results. Nor can you postpone, prevent or otherwise significantly affect many of the above issu ...
... storage layout. The design implemented by these products descended from research developed in the 1970s. The design was optimized for the most common database application at the time: business transactional data processing. The goal of these applications was to automate mission-critical business tas ...
Ch3: Database Modeling Building Blocks
... For example, a hashing algorithm takes a string and creates a number from that string Hash indexes can be highly efficient for read access, but are best avoided when subjected to any kind of data changes ...
... For example, a hashing algorithm takes a string and creates a number from that string Hash indexes can be highly efficient for read access, but are best avoided when subjected to any kind of data changes ...
Transactions
... If a transaction Ti is aborted, all its actions have to be undone. Not only that, if Tj reads an object last written by Ti, Tj must be aborted as well! Most systems avoid such cascading aborts by releasing a transaction’s locks only at commit time. ...
... If a transaction Ti is aborted, all its actions have to be undone. Not only that, if Tj reads an object last written by Ti, Tj must be aborted as well! Most systems avoid such cascading aborts by releasing a transaction’s locks only at commit time. ...
Computers: Understanding Technology, 3e
... Database Administration Data Integrity – data integrity – the accuracy of information provided to database users – redundancy – duplication of data in several fields; an enemy of data integrity – normalization – prevents duplicate data storage and reduces chance that some data will not be updated w ...
... Database Administration Data Integrity – data integrity – the accuracy of information provided to database users – redundancy – duplication of data in several fields; an enemy of data integrity – normalization – prevents duplicate data storage and reduces chance that some data will not be updated w ...
JDBC (Java DataBase Connectivity)
... When Java first came out, this was a useful driver because most databases only supported ODBC access but now this type of driver is recommended only for experimental use or when no other alternative is available. The JDBC-ODBC bridge that comes with JDK 1.2 is a good example of this kind of driver. ...
... When Java first came out, this was a useful driver because most databases only supported ODBC access but now this type of driver is recommended only for experimental use or when no other alternative is available. The JDBC-ODBC bridge that comes with JDK 1.2 is a good example of this kind of driver. ...
Security
... 1 or more _user administrator accounts 1 or more _user accounts for data access Eliminate built-in default-user accounts ...
... 1 or more _user administrator accounts 1 or more _user accounts for data access Eliminate built-in default-user accounts ...
GDT-ETL Part 1
... Command line tool and now with a Graphical User Interface (to be shown) Object Oriented Design. Will work on Windows or UNIX platforms. Comprehensive error logging and process monitoring. Will work with existing enterprise scheduling facilities. ETL Requirements Windows ...
... Command line tool and now with a Graphical User Interface (to be shown) Object Oriented Design. Will work on Windows or UNIX platforms. Comprehensive error logging and process monitoring. Will work with existing enterprise scheduling facilities. ETL Requirements Windows ...
Processing SSAS multidimensional databsaes
... SQL query to return new rows only SSAS actually creates new partition containing only new rows and merges new partition with old ...
... SQL query to return new rows only SSAS actually creates new partition containing only new rows and merges new partition with old ...
Evaluation of EMC VNX8000 and EMC XtremSW Cache September 2013
... advantage of multi-core processors in the storage system, spreading the workload across all the cores evenly, and use the latest generation PCIe 3.0 bus architecture. This results in storage systems that support heavy mixed virtualized workloads found in large IT datacenters. The VNX8000 with SSDs ...
... advantage of multi-core processors in the storage system, spreading the workload across all the cores evenly, and use the latest generation PCIe 3.0 bus architecture. This results in storage systems that support heavy mixed virtualized workloads found in large IT datacenters. The VNX8000 with SSDs ...
Concurrency_Control_Techniques
... If transaction T issues write_item (X) and version i of X has the highest write_TS(Xi) of all versions of X that is also less than or equal to TS(T), and read _TS(Xi) > TS(T), then abort and roll-back T; otherwise create a new version Xi and read_TS(X) = write_TS(Xj) = TS(T). If transaction T issues ...
... If transaction T issues write_item (X) and version i of X has the highest write_TS(Xi) of all versions of X that is also less than or equal to TS(T), and read _TS(Xi) > TS(T), then abort and roll-back T; otherwise create a new version Xi and read_TS(X) = write_TS(Xj) = TS(T). If transaction T issues ...
♦ Sunrise: A Real-Time Event-Processing System and Avi Silberschatz
... goals, all the data necessary for event processing is stored in the DataBlitz™ main-memory database system. Because of space limitations in main memory, it is not possible to store information about individual processed events within Sunrise itself; instead, processed-event records are typically sen ...
... goals, all the data necessary for event processing is stored in the DataBlitz™ main-memory database system. Because of space limitations in main memory, it is not possible to store information about individual processed events within Sunrise itself; instead, processed-event records are typically sen ...
ChemoCare User Guide - System Setup
... installed at a client site. It includes the procedures required to backup the existing system and upgrade to a later version. The manual does not describe how ChemoCare is prepared for clinical use as this is described in the User Guide – System Setup . This guide will be provided by the CIS product ...
... installed at a client site. It includes the procedures required to backup the existing system and upgrade to a later version. The manual does not describe how ChemoCare is prepared for clinical use as this is described in the User Guide – System Setup . This guide will be provided by the CIS product ...
- Courses - University of California, Berkeley
... be used to build some desired relation from the database. • Relational Calculus provides a notation for formulating the definition of that desired relation in terms of the relations in the database without explicitly stating the operations to be performed • SQL is based on the relational calculus. ...
... be used to build some desired relation from the database. • Relational Calculus provides a notation for formulating the definition of that desired relation in terms of the relations in the database without explicitly stating the operations to be performed • SQL is based on the relational calculus. ...
Microsoft Jet Database Engine
The Microsoft Jet Database Engine is a database engine on which several Microsoft products have been built. A database engine is the underlying component of a database, a collection of information stored on a computer in a systematic way. The first version of Jet was developed in 1992, consisting of three modules which could be used to manipulate a database.Database connect for MicrosoftJET stands for Joint Engine Technology, sometimes being referred to as Microsoft JET Engine or simply Jet. Microsoft Access and Visual Basic use or have used Jet as their underlying database engine. It has since been superseded for general use, however, first by Microsoft Desktop Engine (MSDE), then later by SQL Server Express. For larger database needs, Jet databases can be upgraded (or, in Microsoft parlance, ""up-sized"") to Microsoft's flagship database product, SQL Server.However, this does not mean that a MS Jet (Red) database cannot match MS SQL Server in storage capacity. A 5 billion record MS Jet (Red) database with compression and encryption turned on requires about 1 terabyte of disk storage space, comprising hundreds of (*.mdb) files, each acting as partial table, and not as a database in itself.Over the years, Jet has become almost synonymous with Microsoft Access, to the extent that many people refer to a Jet database as an ""Access database"".