Low-Overhead Asynchronous Checkpointing in Main
... recovering from a log upon a failure is typically far slower than copying database state from a replica [9]. Some main-memory systems, such as H-Store [20] and the early versions of VoltDB [23], and even some disk-based systems like C-Store [19] and HARBOR [9] abandoned logging protocols such as ARI ...
... recovering from a log upon a failure is typically far slower than copying database state from a replica [9]. Some main-memory systems, such as H-Store [20] and the early versions of VoltDB [23], and even some disk-based systems like C-Store [19] and HARBOR [9] abandoned logging protocols such as ARI ...
SELECT
... » Hence, the NOT NULL constraint is not allowed for such an attribute » The database users must still enter a value for the new attribute JOB for each EMPLOYEE tuple » This can be done using the UPDATE command ...
... » Hence, the NOT NULL constraint is not allowed for such an attribute » The database users must still enter a value for the new attribute JOB for each EMPLOYEE tuple » This can be done using the UPDATE command ...
Best Practices for Synchronous Redo Transport
... Data Guard transport services handle all aspects of transmitting redo from a primary to a standby databases(s). As users commit transactions at a primary database, redo records are generated and written to a local online log file. Data Guard transport services simultaneously transmit the same redo d ...
... Data Guard transport services handle all aspects of transmitting redo from a primary to a standby databases(s). As users commit transactions at a primary database, redo records are generated and written to a local online log file. Data Guard transport services simultaneously transmit the same redo d ...
difference sequence compression of multidimensional databases
... N G and R AVISHANKAR [5] present and then discuss three block-based database compression techniques. Two of them, BIT and ATS, are adaptations of conventional data compression techniques. The third one, TDC, exploits the redundancy among tuples in a different way to achieve compression. The idea of ...
... N G and R AVISHANKAR [5] present and then discuss three block-based database compression techniques. Two of them, BIT and ATS, are adaptations of conventional data compression techniques. The third one, TDC, exploits the redundancy among tuples in a different way to achieve compression. The idea of ...
Best Practices - Pivotal Greenplum Database Documentation
... This document does not teach you how to use Greenplum Database features. Refer to the Greenplum Database documentation at http://gpdb.docs.pivotal.io for information on how to use and implement specific Greenplum Database features. This document addresses the most important best practices to follow ...
... This document does not teach you how to use Greenplum Database features. Refer to the Greenplum Database documentation at http://gpdb.docs.pivotal.io for information on how to use and implement specific Greenplum Database features. This document addresses the most important best practices to follow ...
Chapter 14: Query Optimization
... tuples that could be useful for a later operation. Generating the result of r1 r2 r3 sorted on the attributes common with r4 or r5 may be useful, but generating it sorted on the attributes common only r1 and r2 is not useful. Using merge-join to compute r1 r2 r3 may be costlier, but may provide ...
... tuples that could be useful for a later operation. Generating the result of r1 r2 r3 sorted on the attributes common with r4 or r5 may be useful, but generating it sorted on the attributes common only r1 and r2 is not useful. Using merge-join to compute r1 r2 r3 may be costlier, but may provide ...
Chapter 14: Query Optimization
... two expressions generate the same set of tuples on every legal database instance In SQL, inputs and outputs are multisets (where the order is not ...
... two expressions generate the same set of tuples on every legal database instance In SQL, inputs and outputs are multisets (where the order is not ...
Enterprise Mgr. TimesTen Plug
... Install the Oracle Enterprise Manager Agent. Make sure the agent can successfully communicate with your Oracle Enterprise Manager Server and can upload data. For example, Agent Availability must be UP, Last Load Time should show a recent date/timestamp, and Last Load Time should get periodically ...
... Install the Oracle Enterprise Manager Agent. Make sure the agent can successfully communicate with your Oracle Enterprise Manager Server and can upload data. For example, Agent Availability must be UP, Last Load Time should show a recent date/timestamp, and Last Load Time should get periodically ...
MSDE or SQL Server 2000 Database
... Microsoft SQL Server 2000. It is based on the same data engine as SQL Server, but is designed for use on a user’s laptop, desktop PC, or a small workgroup server. Unlike SQL Server, MSDE: Has a 2 GB storage limit. • Has a query connection limit of five. This means that, while many users can be conne ...
... Microsoft SQL Server 2000. It is based on the same data engine as SQL Server, but is designed for use on a user’s laptop, desktop PC, or a small workgroup server. Unlike SQL Server, MSDE: Has a 2 GB storage limit. • Has a query connection limit of five. This means that, while many users can be conne ...
Slide 1 - HSLS - University of Pittsburgh
... Vector NTI Database Maintenance 1. Database Backup Backing up your database is extremely important. It should be performed at least every month, but a weekly backup is recommended. Backups should be stored on both the hard drive and a removable media, such as a CD. – Menu|Database > Database Backup ...
... Vector NTI Database Maintenance 1. Database Backup Backing up your database is extremely important. It should be performed at least every month, but a weekly backup is recommended. Backups should be stored on both the hard drive and a removable media, such as a CD. – Menu|Database > Database Backup ...
Parallel Databases - UCF Computer Science
... A cube with N 3 grid blocks can be seen as N 2-dimensional planes stacked up in the third dimension. Y X Z First, apply the 2D_GMDA to the top plan. This also initializes the first row for each of the vertical plans. ...
... A cube with N 3 grid blocks can be seen as N 2-dimensional planes stacked up in the third dimension. Y X Z First, apply the 2D_GMDA to the top plan. This also initializes the first row for each of the vertical plans. ...
Introducing Data Definition Language (DDL) for IMS Metadata #17764
... The workshops, sessions and materials have been prepared by IBM or the session speakers and reflect their own views. They are provided for informational purposes only, and are neither intended to, nor shall have the effect of being, legal or other guidance or advice to any participant. While efforts ...
... The workshops, sessions and materials have been prepared by IBM or the session speakers and reflect their own views. They are provided for informational purposes only, and are neither intended to, nor shall have the effect of being, legal or other guidance or advice to any participant. While efforts ...
Query Processing Principles & Tuning Queries
... Scan Reserves: 1000 page I/Os, 100*1000 tuples. For each Reserves tuple: 1.2 I/Os to get data entry in index, plus 1 I/O to get (the exactly one) matching Sailors tuple. Total: 220,000 I/Os. Hash-index (Alt. 2) on sid of Reserves (as inner): Scan Sailors: 500 page I/Os, 80*500 tuples. For ea ...
... Scan Reserves: 1000 page I/Os, 100*1000 tuples. For each Reserves tuple: 1.2 I/Os to get data entry in index, plus 1 I/O to get (the exactly one) matching Sailors tuple. Total: 220,000 I/Os. Hash-index (Alt. 2) on sid of Reserves (as inner): Scan Sailors: 500 page I/Os, 80*500 tuples. For ea ...
New Software for Ensemble Creation in the - adass xiv
... creation are well documented and under version control. Spitzer pipeline-operator Ron Beck created the first version of a script for executing the ensemble-creation rules • Rules are hard coded (and therefore hard to change) • Direct SQL is used for DB access (open/close DB connection for each acces ...
... creation are well documented and under version control. Spitzer pipeline-operator Ron Beck created the first version of a script for executing the ensemble-creation rules • Rules are hard coded (and therefore hard to change) • Direct SQL is used for DB access (open/close DB connection for each acces ...
cos346day23
... • It incorporates all of the functionality of ADO and OLE DB facilitates the transformation of XML documents to and from database constructs. • It uses datasets, which are in-memory, fullyfunctioned, independent databases. ...
... • It incorporates all of the functionality of ADO and OLE DB facilitates the transformation of XML documents to and from database constructs. • It uses datasets, which are in-memory, fullyfunctioned, independent databases. ...
Database Engines on Multicores, Why Parallelize When You Can
... run in a multicore machine. The parallelism offered by multicore is exploited through the combined performance of a collection of unmodified engines rather than through the optimization of a single engine modified to run on multiple cores. An interesting aspect of Multimed is that each engine is res ...
... run in a multicore machine. The parallelism offered by multicore is exploited through the combined performance of a collection of unmodified engines rather than through the optimization of a single engine modified to run on multiple cores. An interesting aspect of Multimed is that each engine is res ...
Module 1: Introduction - Perancangan Basis Data
... Simple language consisting of path expressions An XML query language with a rich set of features ...
... Simple language consisting of path expressions An XML query language with a rich set of features ...