PowerPoint Chapter 12
... • Distributed databases make it possible for transaction to access data at several sites • Final COMMIT must not be issued until all sites have committed their parts of transaction • Two-phase commit protocol requires each individual DP’s transaction log entry be written before database fragment is ...
... • Distributed databases make it possible for transaction to access data at several sites • Final COMMIT must not be issued until all sites have committed their parts of transaction • Two-phase commit protocol requires each individual DP’s transaction log entry be written before database fragment is ...
COURSE SYLLABUS AND REPORT Advanced Database Systems
... This report was prepared by the author to partially fulfill the requirements of the submission to the “agregação” jury at University Fernando Pessoa. The “agregado” title is awarded by University Fernando Pessoa as described in Regulamento n.º 307/2008, published in the Official Journal, 2nd series, ...
... This report was prepared by the author to partially fulfill the requirements of the submission to the “agregação” jury at University Fernando Pessoa. The “agregado” title is awarded by University Fernando Pessoa as described in Regulamento n.º 307/2008, published in the Official Journal, 2nd series, ...
Super database computers : hardware and software
... DBMS for exercising inventory control of supplies and demands [3,4]. For a very large and complex database where the database applications are diverse, and involved, there may be applications for example, in table handling, design management and inventory control. A single data model and model-based ...
... DBMS for exercising inventory control of supplies and demands [3,4]. For a very large and complex database where the database applications are diverse, and involved, there may be applications for example, in table handling, design management and inventory control. A single data model and model-based ...
Oracle Database
... • It is responsible for maintaining a certain number of open connections to the database • When your applications need a connection, they ask for one from the CM’s pool • Why? Because opening and closing connections takes a long time • Warning: the CM should always setAutoCommit(false) when a connec ...
... • It is responsible for maintaining a certain number of open connections to the database • When your applications need a connection, they ask for one from the CM’s pool • Why? Because opening and closing connections takes a long time • Warning: the CM should always setAutoCommit(false) when a connec ...
Models for Storing Relationships: Relational vs. Graph Databases
... degree relationships (i.e. friends of friends) while relational databases struggle with them, especially as the degrees of separation increase. This is just one of the many scenarios in which a graph database can be more fitting for a data set than a relational database. Both relational databases an ...
... degree relationships (i.e. friends of friends) while relational databases struggle with them, especially as the degrees of separation increase. This is just one of the many scenarios in which a graph database can be more fitting for a data set than a relational database. Both relational databases an ...
Introduction to Grouper
... • Note: there is performance overhead associated with this configuration • Set group type to: addIncludeExclude to automatically configure this ...
... • Note: there is performance overhead associated with this configuration • Set group type to: addIncludeExclude to automatically configure this ...
Part2 - UCSB Computer Science
... Leader is the gateway for group accesses “Safe” ownership transfer: deal with dynamics of the underlying Key Value store Data dynamics of the Key-Value store ...
... Leader is the gateway for group accesses “Safe” ownership transfer: deal with dynamics of the underlying Key Value store Data dynamics of the Key-Value store ...
Understanding Computers, Chapter 14
... – Ensures that data being entered into the database does not violate any specified criteria ...
... – Ensures that data being entered into the database does not violate any specified criteria ...
What are the components of instance?
... and monitors them while the database is running. They are stored in memory, where many of them can be changed dynamically. These parameters are called initialization parameters. The Oracle instance reads initialization parameters from a file at startup. There are two types of parameter files, and wh ...
... and monitors them while the database is running. They are stored in memory, where many of them can be changed dynamically. These parameters are called initialization parameters. The Oracle instance reads initialization parameters from a file at startup. There are two types of parameter files, and wh ...
Understanding Computers, Chapter 14
... – Ensures that data being entered into the database does not violate any specified criteria ...
... – Ensures that data being entered into the database does not violate any specified criteria ...
Application Server Performance – A Technical White Paper
... conserve resources and enhance the overall scalability of the system. EJB containers limit the number of stateful session beans instances in memory, by swapping out a stateful bean, saving its conversational state to a hard disk or other storage. This is called passivation. When the original client ...
... conserve resources and enhance the overall scalability of the system. EJB containers limit the number of stateful session beans instances in memory, by swapping out a stateful bean, saving its conversational state to a hard disk or other storage. This is called passivation. When the original client ...
grant select on
... OPTION. In this way, privileges on R can propagate to other accounts without the knowledge of the owner of R. If the owner account A now revokes the privilege granted to B, all the privileges that B propagated based on that privilege should automatically be revoked by the system. ...
... OPTION. In this way, privileges on R can propagate to other accounts without the knowledge of the owner of R. If the owner account A now revokes the privilege granted to B, all the privileges that B propagated based on that privilege should automatically be revoked by the system. ...
Database Mirroring
... Witness Only required for automatic failover; Just another instance of SQL Server 2005 Can serve multiple sessions ...
... Witness Only required for automatic failover; Just another instance of SQL Server 2005 Can serve multiple sessions ...
Hippo: a System for Computing Consistent Answers to a
... Integrity constraints express important properties of data, but the task of preserving data consistency is becoming increasingly problematic with new database applications. For example, in the case of integration of several data sources, even if the sources are separately consistent, the integrated ...
... Integrity constraints express important properties of data, but the task of preserving data consistency is becoming increasingly problematic with new database applications. For example, in the case of integration of several data sources, even if the sources are separately consistent, the integrated ...
Powerpoint - SQL Saturday
... Workflow for the client library 1. Create a database called a “Shard Map Manager”. 2. Register databases as shards in the SMM. 3. Setup the shard distribution method (lists of keys or ranges). 4. Request a connection from the library based on the sharding key (data dependent routing). 5. Use that c ...
... Workflow for the client library 1. Create a database called a “Shard Map Manager”. 2. Register databases as shards in the SMM. 3. Setup the shard distribution method (lists of keys or ranges). 4. Request a connection from the library based on the sharding key (data dependent routing). 5. Use that c ...
AutoPilot® TransactionWorks® Transaction Analyzer
... BEFORE INSTALLATION ................................................................................................................................ 9 3.1.1 Technical Documents............................................................................................................................ ...
... BEFORE INSTALLATION ................................................................................................................................ 9 3.1.1 Technical Documents............................................................................................................................ ...
Distributed Databases
... visible, but code must ensure no inconsistent states result due to concurrency Persistent messaging systems are systems that provide transactional properties to messages Messages are guaranteed to be delivered exactly once Will discuss implementation techniques later ...
... visible, but code must ensure no inconsistent states result due to concurrency Persistent messaging systems are systems that provide transactional properties to messages Messages are guaranteed to be delivered exactly once Will discuss implementation techniques later ...
Aggregate Queries in NoSQL Cloud Data Stores
... feature set, transaction management, and query capabilities relational database solutions are able to handle nearly any imaginable task. However, problems start arising once these databases have to become distributed in order to handle the more demanding traffic; coming from the era of mainframes, t ...
... feature set, transaction management, and query capabilities relational database solutions are able to handle nearly any imaginable task. However, problems start arising once these databases have to become distributed in order to handle the more demanding traffic; coming from the era of mainframes, t ...
pdf-2
... distinct replicas may lead to inconsistent data unless special concurrency control mechanisms are implemented. " One solution: choose one copy as primary copy and apply ...
... distinct replicas may lead to inconsistent data unless special concurrency control mechanisms are implemented. " One solution: choose one copy as primary copy and apply ...
The eBay Architecture - Adding Simplicity
... • 3-tiered conceptual architecture (separation of bus/pres and db access tiers) • 2-tiered physical implementation (no application server) • C++ Library (eBayISAPI.dll) running on IIS on Windows • Microsoft index server used for search • Items migrated from GDBM to an Oracle database on Solaris ...
... • 3-tiered conceptual architecture (separation of bus/pres and db access tiers) • 2-tiered physical implementation (no application server) • C++ Library (eBayISAPI.dll) running on IIS on Windows • Microsoft index server used for search • Items migrated from GDBM to an Oracle database on Solaris ...
Chapter 19: Distributed Databases
... visible, but code must ensure no inconsistent states result due to concurrency Persistent messaging systems are systems that provide transactional properties to messages Messages are guaranteed to be delivered exactly once Will discuss implementation techniques later ...
... visible, but code must ensure no inconsistent states result due to concurrency Persistent messaging systems are systems that provide transactional properties to messages Messages are guaranteed to be delivered exactly once Will discuss implementation techniques later ...
RemusDB: Transparent High Availability for Database Systems
... In particular, the effects of transactions that commit (at the active VM) before the failure should persist (at the standby VM) after the failover, and failover should not compromise transaction atomicity. During normal operation, Remus takes frequent, incremental checkpoints of the complete state o ...
... In particular, the effects of transactions that commit (at the active VM) before the failure should persist (at the standby VM) after the failover, and failover should not compromise transaction atomicity. During normal operation, Remus takes frequent, incremental checkpoints of the complete state o ...
Distributed Database System Homogeneous Distributed
... it is written to a received-messages relation if it is not already present (the message id is used for this check). The transaction performing the write is committed ...
... it is written to a received-messages relation if it is not already present (the message id is used for this check). The transaction performing the write is committed ...