Joins for Hybrid Warehouses: Exploiting Massive Parallelism in Hadoop and Enterprise Data Warehouses.
... the tables participating in the join is small enough, and the other is very large, to save communication cost. The databases also exploit careful physical data organization for joins. They rely on query workloads to identify joins between large tables, and co-partition them on the join key to avoid ...
... the tables participating in the join is small enough, and the other is very large, to save communication cost. The databases also exploit careful physical data organization for joins. They rely on query workloads to identify joins between large tables, and co-partition them on the join key to avoid ...
Clay: Fine-Grained Adaptive Partitioning for General Database
... while other applications are subject to dynamic fluctuations in their workload. For example, the trading volume on the NYSE is an order of magnitude higher at the beginning and end of the trading day, and transaction volume spikes when there is relevant breaking news. Further complicating this probl ...
... while other applications are subject to dynamic fluctuations in their workload. For example, the trading volume on the NYSE is an order of magnitude higher at the beginning and end of the trading day, and transaction volume spikes when there is relevant breaking news. Further complicating this probl ...
Slides from Lecture 19 - Courses - University of California, Berkeley
... Digital Libraries Are Like Traditional Libraries... ...
... Digital Libraries Are Like Traditional Libraries... ...
Database Access
... relational tables widely used in database applications. The AMPL table declaration lets you take advantage of this similarity to define explicit connections between sets, parameters, variables, and expressions in AMPL, and relational database tables maintained by other software. The read table and w ...
... relational tables widely used in database applications. The AMPL table declaration lets you take advantage of this similarity to define explicit connections between sets, parameters, variables, and expressions in AMPL, and relational database tables maintained by other software. The read table and w ...
STORAGE TIERING FOR DB2 FOR LINUX, UNIX, AND WINDOWS (LUW) WITH
... entire database onto a single type of storage resource makes storage management easier, it is also very wasteful when using a high-end storage array such as a Symmetrix VMAX since data access skewing is not taken into account. Another factor that is usually not taken into account is the fact that d ...
... entire database onto a single type of storage resource makes storage management easier, it is also very wasteful when using a high-end storage array such as a Symmetrix VMAX since data access skewing is not taken into account. Another factor that is usually not taken into account is the fact that d ...
Query Formulation from High-level Concepts for Relational Databases
... based on the intermediate results obtained. The system can also compose a complex query from the SPJ queries without executing them at each step if the user is not interested in knowing the intermediate result. Solving complex queries in such a manner mimics the human cognitive process and also prov ...
... based on the intermediate results obtained. The system can also compose a complex query from the SPJ queries without executing them at each step if the user is not interested in knowing the intermediate result. Solving complex queries in such a manner mimics the human cognitive process and also prov ...
Design Science: Building the Future of AIS
... To make these categories of research outputs more concrete we apply them to a database example from the computer science literature. Some important constructs in the relational model (Codd 1970) are relations, tuples, attributes, and domains. A table in a database is a relation. For example, a table ...
... To make these categories of research outputs more concrete we apply them to a database example from the computer science literature. Some important constructs in the relational model (Codd 1970) are relations, tuples, attributes, and domains. A table in a database is a relation. For example, a table ...
Hands-On Database, 2e (Conger)
... 4) A requirement is something a database needs to do in order to fulfill its purpose. Answer: TRUE Diff: 2 Page Ref: 22 5) You only need to include the most important stakeholders in the database discussions. Answer: FALSE Diff: 2 Page Ref: 22 6) Forms are used for gathering input. Answer: TRUE Dif ...
... 4) A requirement is something a database needs to do in order to fulfill its purpose. Answer: TRUE Diff: 2 Page Ref: 22 5) You only need to include the most important stakeholders in the database discussions. Answer: FALSE Diff: 2 Page Ref: 22 6) Forms are used for gathering input. Answer: TRUE Dif ...
ch14kmDistributedProcessing
... skills for an application programmer. – If you want to write distributed programs you must learn to program network primitives send() and reveive() – Is the message sent? Is the message received? What if…? ...
... skills for an application programmer. – If you want to write distributed programs you must learn to program network primitives send() and reveive() – Is the message sent? Is the message received? What if…? ...
NET Data Access Architecture Guide - Michetti Information Solutions
... and Web services. As with other feature-rich object models, ADO.NET offers a number of ways to solve a particular problem. The .NET Data Access Architecture Guide provides information to help you choose the most appropriate data access approach. It does this by describing a wide range of common data ...
... and Web services. As with other feature-rich object models, ADO.NET offers a number of ways to solve a particular problem. The .NET Data Access Architecture Guide provides information to help you choose the most appropriate data access approach. It does this by describing a wide range of common data ...
Document
... • You can automate the exporting of all SQL Server Agent Jobs, Operators, and Alerts you have defined. This can be done through the use of SMO. • Know how to restore the system databases. – See this BOL article for the necessary steps to restore the master database: http://msdn.microsoft.com/enus/li ...
... • You can automate the exporting of all SQL Server Agent Jobs, Operators, and Alerts you have defined. This can be done through the use of SMO. • Know how to restore the system databases. – See this BOL article for the necessary steps to restore the master database: http://msdn.microsoft.com/enus/li ...
Scaling Hibernate Applications with Postgres
... • Reduces the number of database calls or joins to get the data for the user • A common technique is using Materialized Views or OLAP cubes – These are not native constructs in Postgres – But...they can be created with native Postgres constructs like Rule and Triggers ...
... • Reduces the number of database calls or joins to get the data for the user • A common technique is using Materialized Views or OLAP cubes – These are not native constructs in Postgres – But...they can be created with native Postgres constructs like Rule and Triggers ...
Deploying SurfControl E-mail Filter for SMTP.fm
... siteA is down (e.g., with a network failure), the sending mail server will route e-mail to the fourth (failover) MX record, which is the address of a server in a different physical location. For the described failover to work properly, SurfControl servers in siteA are configured to accept messages f ...
... siteA is down (e.g., with a network failure), the sending mail server will route e-mail to the fourth (failover) MX record, which is the address of a server in a different physical location. For the described failover to work properly, SurfControl servers in siteA are configured to accept messages f ...
Cost Based Optimizer (CBO) and Database Statistics
... servers with varying amounts of data. First the statistics must be collected into a statistics table. In the following examples the statistics for the APPSCHEMA user are collected into a new table, STATS_TABLE, which is owned by DBASCHEMA: SQL> EXEC DBMS_STATS.create_stat_table('DBASCHEMA','STATS_TA ...
... servers with varying amounts of data. First the statistics must be collected into a statistics table. In the following examples the statistics for the APPSCHEMA user are collected into a new table, STATS_TABLE, which is owned by DBASCHEMA: SQL> EXEC DBMS_STATS.create_stat_table('DBASCHEMA','STATS_TA ...
Monitor an Enterprise of SQL Servers - Automating Management by
... parse of the scripts and stores the result in a Perl nested hash record structure. For our purposes, there is no need to write a sophisticated parser to parse these SQL scripts. Because we control how they are produced by SQLDMO in a predictable format, Perl can parse them very conveniently. The Per ...
... parse of the scripts and stores the result in a Perl nested hash record structure. For our purposes, there is no need to write a sophisticated parser to parse these SQL scripts. Because we control how they are produced by SQLDMO in a predictable format, Perl can parse them very conveniently. The Per ...
Docteur de l`Université Louis Pasteur Strasbourg 1
... creating for me a home away from home and for always being there for me. All my friends here at the IGBMC who have been a stronghold and a great support to me, I am glad I have friends like you. Murugan, Beena, Jai, Amit and Harshal thanks for being around! Last but not least my heartfelt gratitude ...
... creating for me a home away from home and for always being there for me. All my friends here at the IGBMC who have been a stronghold and a great support to me, I am glad I have friends like you. Murugan, Beena, Jai, Amit and Harshal thanks for being around! Last but not least my heartfelt gratitude ...
document
... What is MYSQL? a multithreaded, multi-user SQL database management system. A Database Management System which is available for both Linux and Windows. ...
... What is MYSQL? a multithreaded, multi-user SQL database management system. A Database Management System which is available for both Linux and Windows. ...
How to Connect to an IBM DB2 Database that Uses Kerberos
... Kerberos is a network authentication protocol which uses tickets to authenticate access to services and nodes in a network. You can use Kerberos to provide mutual authentication between the machine where the PowerCenter Integration Service runs and the IBM DB2 database. Kerberos uses a Key Distribut ...
... Kerberos is a network authentication protocol which uses tickets to authenticate access to services and nodes in a network. You can use Kerberos to provide mutual authentication between the machine where the PowerCenter Integration Service runs and the IBM DB2 database. Kerberos uses a Key Distribut ...
WLCG2008CERN
... - Our Tivoli Storage Manager system give use the ability to have at the same time a copy of those backups on disk and on tape. ...
... - Our Tivoli Storage Manager system give use the ability to have at the same time a copy of those backups on disk and on tape. ...
Lecture - Department of Computing
... Hash (“random” or “direct” access) a hash function calculates the address where each record is to be stored the calculation is performed on the basis of some fields records appear to be randomly distributed across the file space the function should be chosen such that it leads to an as good ...
... Hash (“random” or “direct” access) a hash function calculates the address where each record is to be stored the calculation is performed on the basis of some fields records appear to be randomly distributed across the file space the function should be chosen such that it leads to an as good ...
Welcome! [www.web
... transaction are permanent once that transaction is committed. Consider a transaction durable if a permanent record of the transaction persists. This may sound obvious, but for optimization purposes transactional records are often kept in memory. However, the transaction cannot be considered ACID unt ...
... transaction are permanent once that transaction is committed. Consider a transaction durable if a permanent record of the transaction persists. This may sound obvious, but for optimization purposes transactional records are often kept in memory. However, the transaction cannot be considered ACID unt ...
Microsoft SQL 2012 MCSA 9 Day
... Use the EXISTS predicate to efficiently check for the existence of rows in a subquery. Module 11: Using Table ExpressionsThis module introduces T-SQL expressions which return a valid relational table, typically for further use in the query. The module discusses views, derived tables, common table ...
... Use the EXISTS predicate to efficiently check for the existence of rows in a subquery. Module 11: Using Table ExpressionsThis module introduces T-SQL expressions which return a valid relational table, typically for further use in the query. The module discusses views, derived tables, common table ...
Database model
A database model is a type of data model that determines the logical structure of a database and fundamentally determines in which manner data can be stored, organized, and manipulated. The most popular example of a database model is the relational model, which uses a table-based format.