CS2029
... Database Architecture – Fragmentation – Distributed Query Processing – Distributed Transactions Processing – Concurrency Control – Recovery – Commit Protocols. ...
... Database Architecture – Fragmentation – Distributed Query Processing – Distributed Transactions Processing – Concurrency Control – Recovery – Commit Protocols. ...
Overcoming Limitations of Sampling for Aggregation Queries
... for Outlier index varies 1%, 5%, 10% and ...
... for Outlier index varies 1%, 5%, 10% and ...
Introduction to Physical Database Design
... lection of interrelated records of different types, possibly including a collection of interrelated files. Query and update transactions to a database are made efficient by the implementation of certain search methods as part of the database management system. ...
... lection of interrelated records of different types, possibly including a collection of interrelated files. Query and update transactions to a database are made efficient by the implementation of certain search methods as part of the database management system. ...
ch01
... In a nondatabase environment, each user has a completely separate system; the failure of any single user’s system does not necessarily affect any other user. On the other hand, if several users are sharing the same database, a failure on the part of any one user that damages the database in some way ...
... In a nondatabase environment, each user has a completely separate system; the failure of any single user’s system does not necessarily affect any other user. On the other hand, if several users are sharing the same database, a failure on the part of any one user that damages the database in some way ...
Slide 1
... Must be flexible enough to allow for emergencies but still rigorous enough to avoid discrepancies Users need “stable” QA region with data that they enter and own Must manage reference data effectively ...
... Must be flexible enough to allow for emergencies but still rigorous enough to avoid discrepancies Users need “stable” QA region with data that they enter and own Must manage reference data effectively ...
06-Chapter-19-Database-Recovery
... • Analysis --- identify the dirty (updated pages) in the buffer and set of active transactions at the time of failure • Redo --- reapply updates from the log to the database. It will be done for the committed transactions. • Undo --- scan the log backward and undo the actions of the active transacti ...
... • Analysis --- identify the dirty (updated pages) in the buffer and set of active transactions at the time of failure • Redo --- reapply updates from the log to the database. It will be done for the committed transactions. • Undo --- scan the log backward and undo the actions of the active transacti ...
ADO.NET access to databases
... application, you must first have a connection to the data store. • In ADO.NET you can create and manage a connection using one of two connection objects: – SqlConnection - an object that manages a connection to a SQL Server version 7.0 or later. (optimized because it bypasses the OLE DB layer) – Ole ...
... application, you must first have a connection to the data store. • In ADO.NET you can create and manage a connection using one of two connection objects: – SqlConnection - an object that manages a connection to a SQL Server version 7.0 or later. (optimized because it bypasses the OLE DB layer) – Ole ...
C-Store: The Life of a Query - Sun Yat
... After data access, access methods return control to the query executor’s operators. Operators generate result tuples. Result tuples are placed in a buffer for the Client Communication Manager The Client Communication Manager ships the result tuples back to the Client. At the end of the query, the tr ...
... After data access, access methods return control to the query executor’s operators. Operators generate result tuples. Result tuples are placed in a buffer for the Client Communication Manager The Client Communication Manager ships the result tuples back to the Client. At the end of the query, the tr ...
Database Replication techniques - Department of Computer Science
... May require that instead of one site doing the work (the primary copy) all sites do the same work. ...
... May require that instead of one site doing the work (the primary copy) all sites do the same work. ...
Information systems and databases
... Encryption: data is coded to render it unreadable by any who do not possess the key for decryption. But codes can be cracked. Back up: where copies of the data are stored separately (full back-up; differential back-up and incremental back-up). But does not guard against the loss of data in the m ...
... Encryption: data is coded to render it unreadable by any who do not possess the key for decryption. But codes can be cracked. Back up: where copies of the data are stored separately (full back-up; differential back-up and incremental back-up). But does not guard against the loss of data in the m ...
OrganizingDataandInf.. - E
... the application program follows a logical access path • When the DBMS goes to a storage device to retrieve the requested data, it follows a path to the physical location (physical access path) where the data is stored ...
... the application program follows a logical access path • When the DBMS goes to a storage device to retrieve the requested data, it follows a path to the physical location (physical access path) where the data is stored ...
Data Independence
... where S.name = “Johnson” and E.id = S.id DBTG: student.name = “Johnson”; find any student using name; find first enrollment within StudentEnroll while DB-status = 0 do begin get enrollment; print (enrollment.grade); find next enrollment within StudentEnroll; ...
... where S.name = “Johnson” and E.id = S.id DBTG: student.name = “Johnson”; find any student using name; find first enrollment within StudentEnroll while DB-status = 0 do begin get enrollment; print (enrollment.grade); find next enrollment within StudentEnroll; ...
SQL Server Administrative Duties
... The logical design of the database, including the tables and the relationships between them, is the core of an optimized relational database. A good logical database design can lay the foundation for optimal database and application performance. A poor logical database design can impair the perfor ...
... The logical design of the database, including the tables and the relationships between them, is the core of an optimized relational database. A good logical database design can lay the foundation for optimal database and application performance. A poor logical database design can impair the perfor ...
SQL Server & High Availability - e
... or Service That They Require. A Resource is Available, or Not. • High Availability = Building Redundancy into a System or Service So As To MAINTAIN AVAILABILITY in the Event of a Certain Failure or Failures ...
... or Service That They Require. A Resource is Available, or Not. • High Availability = Building Redundancy into a System or Service So As To MAINTAIN AVAILABILITY in the Event of a Certain Failure or Failures ...
TPC Benchmarks - TPC
... 1, 10, 30, 100, 300, 1000, 3000, 10000 (note that 3 is missing, not a typo) These correspond to the nominal database size in GB. (I.e., SF 10 is approx. 10 GB, not including indexes and temp tables.) Indices and temporary tables can significantly increase the total disk capacity. (3-5x is typical) D ...
... 1, 10, 30, 100, 300, 1000, 3000, 10000 (note that 3 is missing, not a typo) These correspond to the nominal database size in GB. (I.e., SF 10 is approx. 10 GB, not including indexes and temp tables.) Indices and temporary tables can significantly increase the total disk capacity. (3-5x is typical) D ...
The NEON data model, accessed through
... • A netCDFHandler class that can write Java DataResult objects into NetCDF files. This file-creation is done lazily. • An overall CDS layer that thus offers NEON's application developers a consistent interface -- NetCDF files -- whether the data is stored in NetCDF or in NEON's database. If desired, ...
... • A netCDFHandler class that can write Java DataResult objects into NetCDF files. This file-creation is done lazily. • An overall CDS layer that thus offers NEON's application developers a consistent interface -- NetCDF files -- whether the data is stored in NetCDF or in NEON's database. If desired, ...
Convert Database Structure into Star Schema Structure for
... cleaning and translate Data into a common model populate the database and maintain data warehouses. The creating of data warehouse process consists of five stages: predevelopment activities, architecture selection, creation schemes, and population warehouse and data storage services. Each of these s ...
... cleaning and translate Data into a common model populate the database and maintain data warehouses. The creating of data warehouse process consists of five stages: predevelopment activities, architecture selection, creation schemes, and population warehouse and data storage services. Each of these s ...
Colorado Plateau Cooperative Ecosystem Studies Unit
... The Wildlife database applications must be integrated within the GRCA Resource Information System (RIS) as currently developed, in particular the existing Vegetation database module, and as envisioned in the GRCA Database Management System Requirements Analysis document. Access to the database appl ...
... The Wildlife database applications must be integrated within the GRCA Resource Information System (RIS) as currently developed, in particular the existing Vegetation database module, and as envisioned in the GRCA Database Management System Requirements Analysis document. Access to the database appl ...
Records - MossWinn
... to the included spectrum by the author. Records that double as a model library whose models can be used as a starting point for the fitting of pristine Mössbauer spectra. Records that can be ranked according to their fitness to any particular Mössbauer spectrum by comparing the spectrum data cou ...
... to the included spectrum by the author. Records that double as a model library whose models can be used as a starting point for the fitting of pristine Mössbauer spectra. Records that can be ranked according to their fitness to any particular Mössbauer spectrum by comparing the spectrum data cou ...
A Short History of Database Technology Traditional File
... • Emergence of disciplined DB design: a more semantic or conceptual view of information structures (e.g., E-R) on top of the relational schema significantly simplifies analysis and design process • Design of high-level interactive database languages, based on set-at-a-time, nonprocedural operations, ...
... • Emergence of disciplined DB design: a more semantic or conceptual view of information structures (e.g., E-R) on top of the relational schema significantly simplifies analysis and design process • Design of high-level interactive database languages, based on set-at-a-time, nonprocedural operations, ...
Oracle Database Sequences and Alpha Five
... What Alpha Five does do however is make sure that any table you export will work as expected. Here‟s the way it works. If a table has a single numeric primary key column that is defined as auto-increment or identity (depending on the original database the table is defined in): 1. A new sequence is g ...
... What Alpha Five does do however is make sure that any table you export will work as expected. Here‟s the way it works. If a table has a single numeric primary key column that is defined as auto-increment or identity (depending on the original database the table is defined in): 1. A new sequence is g ...