On Replication - Informatics Homepages Server
... • Is not a replicated system – deal with when/where to copy – Optimization (how much replica needed …) – Grow or shrink replication tree ...
... • Is not a replicated system – deal with when/where to copy – Optimization (how much replica needed …) – Grow or shrink replication tree ...
Chapter 18 - Java Database Connectivity (JDBC)
... The Internet and World Wide Web How to Program Complete Training Course C++ How to Program 2/e and Getting Started with Visual C++ 5.0 Tutorial Java How to Program 2/e and Getting Started with Visual J++ 1.1 Tutorial The Complete C++ Training Course 2/e and Getting Started with Visual C++ 5.0 Tutori ...
... The Internet and World Wide Web How to Program Complete Training Course C++ How to Program 2/e and Getting Started with Visual C++ 5.0 Tutorial Java How to Program 2/e and Getting Started with Visual J++ 1.1 Tutorial The Complete C++ Training Course 2/e and Getting Started with Visual C++ 5.0 Tutori ...
CSC309 Tutorial: JDBC
... only compiled once, regardless of the number of times that they are used. ...
... only compiled once, regardless of the number of times that they are used. ...
Controlling image size when using GemStone
... referenced by the object’s instance variables. If the level is three, the objects referenced by the instance variables of the objects referenced by the primary object’s instance variables are replicated as well. If the level is zero, all related objects are replicated. Any related objects not replic ...
... referenced by the object’s instance variables. If the level is three, the objects referenced by the instance variables of the objects referenced by the primary object’s instance variables are replicated as well. If the level is zero, all related objects are replicated. Any related objects not replic ...
T-RECS
... Before installing the new version of the T-Recs Server Application and Client software, make sure that the required tasks listed below have been completed. If you have any questions regarding these requirements, contact Chesapeake Customer Support. 1. Verify that the drive on which the T-Recs Applic ...
... Before installing the new version of the T-Recs Server Application and Client software, make sure that the required tasks listed below have been completed. If you have any questions regarding these requirements, contact Chesapeake Customer Support. 1. Verify that the drive on which the T-Recs Applic ...
data entries
... R: Number of records per page D: (Average) time to read or write disk page C: Average time to process a record H: The time to apply the hash function to a record F: The fan-out of the index tree (100) Measuring number of page I/O’s ignores gains of pre-fetching a sequence of pages; thus, even I/O co ...
... R: Number of records per page D: (Average) time to read or write disk page C: Average time to process a record H: The time to apply the hash function to a record F: The fan-out of the index tree (100) Measuring number of page I/O’s ignores gains of pre-fetching a sequence of pages; thus, even I/O co ...
Chapter 5
... Summary (continued) • Dictionary-managed tablespaces use a freelist in the dictionary to track blocks • Locally managed tablespaces keep extents the same size or a variable size controlled by system • Types of segments: data, index, temporary, rollback • Before creating a tablespace with a nonstand ...
... Summary (continued) • Dictionary-managed tablespaces use a freelist in the dictionary to track blocks • Locally managed tablespaces keep extents the same size or a variable size controlled by system • Types of segments: data, index, temporary, rollback • Before creating a tablespace with a nonstand ...
Database Performance Study - Information Systems Department
... When a table is referenced in a database query and there is no index a table scan must be performed on that table. The larger the table the longer it would take for the table. However, if indexing is used an index scan would be performed. An index scan is much faster than a table scan. Indexed files ...
... When a table is referenced in a database query and there is no index a table scan must be performed on that table. The larger the table the longer it would take for the table. However, if indexing is used an index scan would be performed. An index scan is much faster than a table scan. Indexed files ...
Document
... DBMS does not allow the value of a surrogate key to be changed Disadvantages: – Foreign keys that are based on surrogate keys have no meaning to the users – When data shared among different databases contain the same ID, merging those tables might yield unexpected results Copyright © 2004 Databa ...
... DBMS does not allow the value of a surrogate key to be changed Disadvantages: – Foreign keys that are based on surrogate keys have no meaning to the users – When data shared among different databases contain the same ID, merging those tables might yield unexpected results Copyright © 2004 Databa ...
Activate Physical Standby: Controlled failover
... Guard. We are confident that this is the best approach without implementing RMAN. Using Data Guard will allow an active standby database for the production database. This environment will provide protection against planned or unplanned downtime as well as against data loss in case the primary databa ...
... Guard. We are confident that this is the best approach without implementing RMAN. Using Data Guard will allow an active standby database for the production database. This environment will provide protection against planned or unplanned downtime as well as against data loss in case the primary databa ...
DESIGN AND IMPLEMENTATION OF THE LOST AND FOUND WEB
... the item is found and brought to one of the offices, they would be [automatically] notified. Additionally, the process of recovering these lost items could sometimes be very tedious. For example, when users are not sure any more as to when they lost an item, most likely, the workers at the lost and ...
... the item is found and brought to one of the offices, they would be [automatically] notified. Additionally, the process of recovering these lost items could sometimes be very tedious. For example, when users are not sure any more as to when they lost an item, most likely, the workers at the lost and ...
Slide 1
... If you do not specify the columns you are inserting data into SQL expects there to be a value for each column that exists in the table ...
... If you do not specify the columns you are inserting data into SQL expects there to be a value for each column that exists in the table ...
Special Interest Activity
... established the connection, TrioExplorer and TrioPlus can use the supperuser’s login and password as windows authentiction to access to database system. However, it doesn’t mention at all in the installation procedure on how to create this typle of new user. The only way to solve it is to use Postgr ...
... established the connection, TrioExplorer and TrioPlus can use the supperuser’s login and password as windows authentiction to access to database system. However, it doesn’t mention at all in the installation procedure on how to create this typle of new user. The only way to solve it is to use Postgr ...
v$session
... Advisory Framework – Memory Advisor – MMAN PGA Advisor: recommends optimal usage of PGA memory based on your workload. SGA Advisor: tuning and recommending SGA size depending on pattern of access for the various components within the SGA: Buffer Cache Advisor: Predicts cache hit rates for buffer ac ...
... Advisory Framework – Memory Advisor – MMAN PGA Advisor: recommends optimal usage of PGA memory based on your workload. SGA Advisor: tuning and recommending SGA size depending on pattern of access for the various components within the SGA: Buffer Cache Advisor: Predicts cache hit rates for buffer ac ...
The Query Optimizer in Oracle Database 12c – What`s New?
... For performance purposes it’s sometimes not necessary to index all data stored in a table For example, it might be enough to index data of the last day or week and to leave older data un-indexed Through 11.2 some kind of partial indexes are supported by implementing particular tricks Making ...
... For performance purposes it’s sometimes not necessary to index all data stored in a table For example, it might be enough to index data of the last day or week and to leave older data un-indexed Through 11.2 some kind of partial indexes are supported by implementing particular tricks Making ...
9I DATA GUARD: TRUTH, MYTHS, AND FAILOVER 9i Data Guard
... database failover only in the event of a software or system failure that results in the loss of the primary database. One of the consequences of a graceful database failover is that the original primary database must be reinstantiated. However, the other standby databases in the configuration do not ...
... database failover only in the event of a software or system failure that results in the loss of the primary database. One of the consequences of a graceful database failover is that the original primary database must be reinstantiated. However, the other standby databases in the configuration do not ...
11gR2_security - Oracle DBA – Tips and Techniques
... User Factors: Name, Authentication type, Proxy Enterprise Identity Network Factors: Machine name, IP, Network Protocols Database Factors: IP, Instance, Hostname, SID Runtime Factors: Date, Time ...
... User Factors: Name, Authentication type, Proxy Enterprise Identity Network Factors: Machine name, IP, Network Protocols Database Factors: IP, Instance, Hostname, SID Runtime Factors: Date, Time ...
Document
... DBMS does not allow the value of a surrogate key to be changed Disadvantages: – Foreign keys that are based on surrogate keys have no meaning to the users – When data shared among different databases contain the same ID, merging those tables might yield unexpected results Copyright © 2004 Databa ...
... DBMS does not allow the value of a surrogate key to be changed Disadvantages: – Foreign keys that are based on surrogate keys have no meaning to the users – When data shared among different databases contain the same ID, merging those tables might yield unexpected results Copyright © 2004 Databa ...
Relation
... The strength of the relational approach to data management comes from the formal foundation provided by the theory of relations. Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition Revised by IB & SAM, Fasilkom UI, 2005 ...
... The strength of the relational approach to data management comes from the formal foundation provided by the theory of relations. Elmasri and Navathe, Fundamentals of Database Systems, Fourth Edition Revised by IB & SAM, Fasilkom UI, 2005 ...
DBMS
... Before a change is made to the database, the corresponding log entry is forced to a safe location. (WAL protocol; OS support for this is often inadequate.) After a crash, the effects of partially executed transactions are undone using the log. (Thanks to WAL, if log entry wasn’t saved before the cra ...
... Before a change is made to the database, the corresponding log entry is forced to a safe location. (WAL protocol; OS support for this is often inadequate.) After a crash, the effects of partially executed transactions are undone using the log. (Thanks to WAL, if log entry wasn’t saved before the cra ...
Phase 2, Answering queries using views.
... When the event happens, the system will check the constraint, and if satisfied, will perform the action. NOTE: triggers may cause cascading effects. Database vendors did not wait for standards with triggers! ...
... When the event happens, the system will check the constraint, and if satisfied, will perform the action. NOTE: triggers may cause cascading effects. Database vendors did not wait for standards with triggers! ...
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"".