• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Oracle Database - Oracle Help Center
Oracle Database - Oracle Help Center

... "commercial computer software" pursuant to the applicable Federal Acquisition Regulation and agencyspecific supplemental regulations. As such, use, duplication, disclosure, modification, and adaptation of the programs, including any operating system, integrated software, any programs installed on th ...
SQL Reference: Statement and Transaction Processing
SQL Reference: Statement and Transaction Processing

... Any comments or materials (collectively referred to as “Feedback”) sent to Teradata Corporation will be deemed non-confidential. Teradata Corporation will have no obligation of any kind with respect to Feedback and will be free to use, reproduce, disclose, exhibit, display, transform, create derivat ...
Oracle Database Administrator`s Guide
Oracle Database Administrator`s Guide

... they are provided under a license agreement containing restrictions on use and disclosure and are also protected by copyright, patent, and other intellectual and industrial property laws. Reverse engineering, disassembly, or decompilation of the Programs, except to the extent required to obtain inte ...
SQL Server Transaction Log Management
SQL Server Transaction Log Management

... that causes SQL Server to shut down unexpectedly, such as an instance-level failure or a hardware failure, SQL Server uses the transaction log in order to recover the database to a consistent state, with data integrity intact. Upon restart, a database enters a crash recovery process in which the tra ...
Oracle Database Concepts
Oracle Database Concepts

... are "commercial computer software" pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, use, duplication, disclosure, modification, and adaptation of the programs, including any operating system, integrated software, any programs installed ...
PDF - Oracle Help Center
PDF - Oracle Help Center

... are "commercial computer software" pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, use, duplication, disclosure, modification, and adaptation of the programs, including any operating system, integrated software, any programs installed ...
Oracle9i Database Administrator`s Guide
Oracle9i Database Administrator`s Guide

... Oracle Corporation; they are provided under a license agreement containing restrictions on use and disclosure and are also protected by copyright, patent and other intellectual and industrial property laws. Reverse engineering, disassembly or decompilation of the Programs, except to the extent requi ...
Databases | Microsoft Docs
Databases | Microsoft Docs

... The msdb database is used by SQL Server Agent for scheduling alerts and jobs and by other features such as SQL Server Management Studio, Service Broker and Database Mail. For example, SQL Server automatically maintains a complete online backup-and-restore history within tables in msdb. This informat ...
SAP HANA Multitenant Database Containers
SAP HANA Multitenant Database Containers

... When planning an SAP HANA MDC deployment, various options exist with regard to scale-up versus scale-out. In general, scaling up offers some performance advantages over scaling out, as memory access is local and minor overhead associated with inter-node network communication is avoided. Note the fol ...
Embarcadero® InterBase XE3™
Embarcadero® InterBase XE3™

... trademarks or registered trademarks of Embarcadero Technologies, Inc. All other trademarks are property of their respective owners. This software/documentation contains proprietary information of Embarcadero Technologies, Inc.; it is provided under a license agreement containing restrictions on use ...
Operations Guide
Operations Guide

... Defense, then it is delivered with Restricted Rights and the following legend is applicable: Restricted Rights Legend Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of DFARS 252.227-7013, Rights in Technical Data and Computer Soft ...
System Administration Guide Volume 2
System Administration Guide Volume 2

... This publication pertains to Sybase software and to any subsequent release until otherwise indicated in new editions or technical notes. Information in this document is subject to change without notice. The software described herein is furnished under a license agreement, and it may be used or copie ...
JADE Database Administration Guide
JADE Database Administration Guide

... In this document, the term Microsoft Windows refers to Windows 10, Windows 8, Windows 7, Windows Server 2012, Windows Server 2008, Windows Vista, or Windows Mobile. When there are differences between the versions of Microsoft Windows, the specific version of Microsoft Windows is stated. With the exc ...
Embedded SQL Guide
Embedded SQL Guide

... Preprocessing and run time databases . . . . . . . . . . . 38 Controlling SET DATABASE scope . . . . . . . . . . . . . . . 39 Specifying a connection character set . . . . . . . . . . . . . . . 40 Opening a database . . . . . . . . . . . . . . . . . . . . . . . . . 41 Using simple CONNECT statements ...
EMC Greenplum DCA Getting Started Guide
EMC Greenplum DCA Getting Started Guide

... architecture. MPP refers to a distributed system that has two or more individual servers, which carry out an operation in parallel. Each server has its own processor(s), memory, operating system and storage. All servers communicate with each other over a common network. In this instance a single dat ...
DatabaseMirroring - Microsoft Center
DatabaseMirroring - Microsoft Center

... In database mirroring, an originating SQL Server 2005 instance continuously sends a database's transaction log records to a copy of the database on another standby SQL Server instance. The originating database and server have the role of principal, and the receiving database and server have the role ...
Accessing Relational and Higher Databases Through Database Set
Accessing Relational and Higher Databases Through Database Set

... system, and the result is returned to the logic programming language where it is held in the standard datastructure ResultRelation. Both ProjectionTerm and DatabaseGoal can be constructed at runtime. This allows a dynamic definition of database access to result in maximally restrictive queries which ...
Enterprise eTIME Database Administrator`s Guide
Enterprise eTIME Database Administrator`s Guide

... Enterprise eTIME Database Installation Guide instructs customers and service personnel who install or upgrade Enterprise eTIME databases. Instructions include installing and setting up the Relational Database Management System (RDBMS) and ADP application database components, and upgrading your datab ...
Greenplum Database 4.3.1.0 Release Notes
Greenplum Database 4.3.1.0 Release Notes

... Workaround: For Hadoop distributions based on Hadoop 2.2 or later that are supported by Greenplum Database, the classpath environment variable and other directory paths defined in $GPHOME/lib/hadoop/hadoop_env.sh must be to be modified so that the paths point to the appropriate JAR files. ...
ORACLE 11g AND 12c DATABASE CONSOLIDATION
ORACLE 11g AND 12c DATABASE CONSOLIDATION

... Use case 2: Consolidating production, test/dev, and reporting workloads onto the same XtremIO array............................................................................................ 23 ...
Greenplum Database 4.3.0.0 Release Notes
Greenplum Database 4.3.0.0 Release Notes

... warehouse environment, where the data is static after it is loaded. Denormalized fact tables are typically the largest tables in the system. Fact tables are usually loaded in batches and accessed by read-only queries. Moving large fact tables to an append-only storage model eliminates the storage ov ...
IT 21003 Database Administration
IT 21003 Database Administration

... this point, further “Next” extents are investigated and if they are also inactive, they are deallocated from the rollback segment until the OPTIMAL size is reached  In this way server processes looking for free extents deallocate the oldest inactive extents first  This means it could be some time ...
Android-Chapter17-SQL-Databases
Android-Chapter17-SQL-Databases

... An action query usually performs maintenance and administrative tasks such as manipulating tables, users, environment, etc. ...
SQL Databases
SQL Databases

... An action query usually performs maintenance and administrative tasks such as manipulating tables, users, environment, etc. ...
How to upgrade oracle database from version 9.2.0.8 to 11.2.0.2
How to upgrade oracle database from version 9.2.0.8 to 11.2.0.2

... (to recompile any remaining stored PL/SQL and Java code) SQL> @utlrp.sql DOC> The following query reports the number of errors caught during DOC> recompilation. If this number is non-zero, please query the error DOC> messages in the table UTL_RECOMP_ERRORS to see if any of these errors DOC> are due ...
1 2 3 4 5 ... 64 >

Commitment ordering

Commitment ordering (CO) is a class of interoperable serializability techniques in concurrency control of databases, transaction processing, and related applications. It allows optimistic (non-blocking) implementations. With the proliferation of multi-core processors, CO has been also increasingly utilized in concurrent programming, transactional memory, and especially in software transactional memory (STM) for achieving serializability optimistically. CO is also the name of the resulting transaction schedule (history) property, which was originally defined in 1988 with the name dynamic atomicity. In a CO compliant schedule the chronological order of commitment events of transactions is compatible with the precedence order of the respective transactions. CO is a broad special case of conflict serializability, and effective means (reliable, high-performance, distributed, and scalable) to achieve global serializability (modular serializability) across any collection of database systems that possibly use different concurrency control mechanisms (CO also makes each system serializability compliant, if not already).Each not-CO-compliant database system is augmented with a CO component (the commitment order coordinator—COCO) which orders the commitment events for CO compliance, with neither data-access nor any other transaction operation interference. As such CO provides a low overhead, general solution for global serializability (and distributed serializability), instrumental for global concurrency control (and distributed concurrency control) of multi database systems and other transactional objects, possibly highly distributed (e.g., within cloud computing, grid computing, and networks of smartphones). An atomic commitment protocol (ACP; of any type) is a fundamental part of the solution, utilized to break global cycles in the conflict (precedence, serializability) graph. CO is the most general property (a necessary condition) that guarantees global serializability, if the database systems involved do not share concurrency control information beyond atomic commitment protocol (unmodified) messages, and have no knowledge whether transactions are global or local (the database systems are autonomous). Thus CO (with its variants) is the only general technique that does not require the typically costly distribution of local concurrency control information (e.g., local precedence relations, locks, timestamps, or tickets). It generalizes the popular strong strict two-phase locking (SS2PL) property, which in conjunction with the two-phase commit protocol (2PC) is the de facto standard to achieve global serializability across (SS2PL based) database systems. As a result CO compliant database systems (with any, different concurrency control types) can transparently join such SS2PL based solutions for global serializability.In addition, locking based global deadlocks are resolved automatically in a CO based multi-database environment, an important side-benefit (including the special case of a completely SS2PL based environment; a previously unnoticed fact for SS2PL).Furthermore, strict commitment ordering (SCO; Raz 1991c), the intersection of Strictness and CO, provides better performance (shorter average transaction completion time and resulting better transaction throughput) than SS2PL whenever read-write conflicts are present (identical blocking behavior for write-read and write-write conflicts; comparable locking overhead). The advantage of SCO is especially significant during lock contention. Strictness allows both SS2PL and SCO to use the same effective database recovery mechanisms.Two major generalizing variants of CO exist, extended CO (ECO; Raz 1993a) and multi-version CO (MVCO; Raz 1993b). They as well provide global serializability without local concurrency control information distribution, can be combined with any relevant concurrency control, and allow optimistic (non-blocking) implementations. Both use additional information for relaxing CO constraints and achieving better concurrency and performance. Vote ordering (VO or Generalized CO (GCO); Raz 2009) is a container schedule set (property) and technique for CO and all its variants. Local VO is a necessary condition for guaranteeing global serializability, if the atomic commitment protocol (ACP) participants do not share concurrency control information (have the generalized autonomy property). CO and its variants inter-operate transparently, guaranteeing global serializability and automatic global deadlock resolution also together in a mixed, heterogeneous environment with different variants.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report