X-FTL: Transactional FTL for SQLite Databases
... The atomic write FTL by Park et al. [18], among the first studies for supporting atomic write in flash storage, exploits the out-of-place update characteristics of flash storage. In particular, this work deals with supporting atomic write of multiple pages specified in a single write call like write ...
... The atomic write FTL by Park et al. [18], among the first studies for supporting atomic write in flash storage, exploits the out-of-place update characteristics of flash storage. In particular, this work deals with supporting atomic write of multiple pages specified in a single write call like write ...
Understanding Computers, 11/e, Chapter 14
... retrieved information (GIGO) Data validation: ensuring that data entered into the database matches the data definition Helps to increase data integrity Can be enforced on a per transaction basis so the entire transaction will fail if one part is invalid Database locking: prevents two individuals ...
... retrieved information (GIGO) Data validation: ensuring that data entered into the database matches the data definition Helps to increase data integrity Can be enforced on a per transaction basis so the entire transaction will fail if one part is invalid Database locking: prevents two individuals ...
Storage Schema for Jena1 and Jena2
... memory or in databases In Jena2, architecture was modified to achieve two goals: Provide a simple minimalist view of the RDF graph Allow easy access to, and manipulation of, data in graphs enabling the data to be exposed as triples ...
... memory or in databases In Jena2, architecture was modified to achieve two goals: Provide a simple minimalist view of the RDF graph Allow easy access to, and manipulation of, data in graphs enabling the data to be exposed as triples ...
Best Practices for Conflict Detection and Resolution in
... It is critical that table primary keys and unique indexes are unique for each database participating in an active-active replication environment. The table primary keys and unique indexes for each database in the active-active replication environment must contain information that identifies which da ...
... It is critical that table primary keys and unique indexes are unique for each database participating in an active-active replication environment. The table primary keys and unique indexes for each database in the active-active replication environment must contain information that identifies which da ...
IST 274 -10 Database Administrator
... Starting Up and Shutting Down the Database •Connecting as SYSDBA to the Database •When using SYS to connect as SYSDBA, you will need to use a special password (not CHANGE_ON_INSTALL) •An INTERNAL connection also requires this password •The “Special” password is held encrypted in a password file (PW ...
... Starting Up and Shutting Down the Database •Connecting as SYSDBA to the Database •When using SYS to connect as SYSDBA, you will need to use a special password (not CHANGE_ON_INSTALL) •An INTERNAL connection also requires this password •The “Special” password is held encrypted in a password file (PW ...
Distributed Databases
... A network is said to be partitioned when it has been split into two or more subsystems that lack any connection between them – Note: a subsystem may consist of a single node ...
... A network is said to be partitioned when it has been split into two or more subsystems that lack any connection between them – Note: a subsystem may consist of a single node ...
Distributed Database Design
... Providing storage structures for efficient query processing Providing backup and recovery Providing multiple interfaces Representing complex relationships among data Enforcing integrity constraints Drawing inferences and actions Webster University ...
... Providing storage structures for efficient query processing Providing backup and recovery Providing multiple interfaces Representing complex relationships among data Enforcing integrity constraints Drawing inferences and actions Webster University ...
SQL Service Broker
... When a transaction locks one of them (at dequeue time) it locks them all. They are unlocked when the transaction is committed. The Conversation Group is owned and localized to the Travel program. This identity does not travel on the “wire”. SQL Service Broker ...
... When a transaction locks one of them (at dequeue time) it locks them all. They are unlocked when the transaction is committed. The Conversation Group is owned and localized to the Travel program. This identity does not travel on the “wire”. SQL Service Broker ...
data model
... Self-describing nature of a database system A DBMS catalog stores the description of the database. The description is called meta-data. This allows the DBMS software to work with different databases A traditional file processing can work with only one specific database. The description of the da ...
... Self-describing nature of a database system A DBMS catalog stores the description of the database. The description is called meta-data. This allows the DBMS software to work with different databases A traditional file processing can work with only one specific database. The description of the da ...
Principles of database performance tuning
... (3) Start-up costs are high; running costs are low It is relatively more expensive to initiate an operation than repeat it for a longer time For example, sending 1 Kbyte across a network is only a bit more expensive then sending 1 byte packet or reading one block takes more or less the same time as ...
... (3) Start-up costs are high; running costs are low It is relatively more expensive to initiate an operation than repeat it for a longer time For example, sending 1 Kbyte across a network is only a bit more expensive then sending 1 byte packet or reading one block takes more or less the same time as ...
SQL: Programming Motivation JDBC Connections Statements Query
... must perform parsing, semantic analysis, optimization, compilation, and then finally execution ! These costs are incurred 10 times in the above example, even though all strings are essentially the same query (with different parameter values) ...
... must perform parsing, semantic analysis, optimization, compilation, and then finally execution ! These costs are incurred 10 times in the above example, even though all strings are essentially the same query (with different parameter values) ...
Chapter 1: Introduction
... D1 = {a, b, c}, D2 = {1, 2}, D1XD2 = {(a, 1), (a, 2), (b, 1), (b, 2), (c, 1), (c, 2)} The current values (relation instance) of a relation are specified by a ...
... D1 = {a, b, c}, D2 = {1, 2}, D1XD2 = {(a, 1), (a, 2), (b, 1), (b, 2), (c, 1), (c, 2)} The current values (relation instance) of a relation are specified by a ...
DBC-e06-Chapter-06-PPT
... Serializable Transactions • When two or more transactions are processed concurrently, the results in the database should be logically consistent with the results that would have been achieved had the transactions been processed in an arbitrary serial fashion. • A scheme for processing concurrent tr ...
... Serializable Transactions • When two or more transactions are processed concurrently, the results in the database should be logically consistent with the results that would have been achieved had the transactions been processed in an arbitrary serial fashion. • A scheme for processing concurrent tr ...
CH09
... 9.4 Relvar Predicates and Database Predicates The relvar predicate for R is the logical And or conjunction of all of the constraints that apply to relvar R. The Golden Rule No update operation must ever assign to any relvar a value that causes its relvar predicate to evaluate to FALSE. The da ...
... 9.4 Relvar Predicates and Database Predicates The relvar predicate for R is the logical And or conjunction of all of the constraints that apply to relvar R. The Golden Rule No update operation must ever assign to any relvar a value that causes its relvar predicate to evaluate to FALSE. The da ...
Summarisation for Mobile Databases
... At the next level, wireless local area networks (WLAN) are a wireless extension of the traditional LAN (Imielinski and Badrinath, 1994). Like the LAN, they may provide medium coverage from ten to a few hundred metres and relatively high data rates. Common examples for WLAN are the IEEE 802.11b and 8 ...
... At the next level, wireless local area networks (WLAN) are a wireless extension of the traditional LAN (Imielinski and Badrinath, 1994). Like the LAN, they may provide medium coverage from ten to a few hundred metres and relatively high data rates. Common examples for WLAN are the IEEE 802.11b and 8 ...
Middleware-based Database Replication: The Gaps
... master without consulting the slave) with an upper-bound time window (e.g., at most all transactions committed in the past 5 minutes have been lost). These guarantees are usually considered weak, but good enough for maintaining uptime in the face of single faults. 2-safe database replication forces ...
... master without consulting the slave) with an upper-bound time window (e.g., at most all transactions committed in the past 5 minutes have been lost). These guarantees are usually considered weak, but good enough for maintaining uptime in the face of single faults. 2-safe database replication forces ...
October 10, 2015
... authentication is not available for logins or contained database users), Cross database queries, cross database ownership chaining, TRUSTWORTHY setting, Data Collector, Database Diagrams, Database Mail, DATABASEPROPERTY (use DATABASEPROPERTYEX instead), Distributed transactions, EXECUTE AS logins, E ...
... authentication is not available for logins or contained database users), Cross database queries, cross database ownership chaining, TRUSTWORTHY setting, Data Collector, Database Diagrams, Database Mail, DATABASEPROPERTY (use DATABASEPROPERTYEX instead), Distributed transactions, EXECUTE AS logins, E ...
Introducing SQL Server 2012 Integration Services
... CREATE SERVER ROLE [AGAdmins] AUTHORIZATION [sa]; GRANT ALTER ANY AVAILABILITY GROUP TO [AGAdmins]; GRANT ALTER ANY ENDPOINT TO [AGAdmins]; GRANT CREATE AVAILABILITY GROUP TO [AGAdmins]; GRANT CREATE ENDPOINT TO [AGAdmins]; ALTER SERVER ROLE [AGAdmins] ADD MEMBER [JohnDoe]; ...
... CREATE SERVER ROLE [AGAdmins] AUTHORIZATION [sa]; GRANT ALTER ANY AVAILABILITY GROUP TO [AGAdmins]; GRANT ALTER ANY ENDPOINT TO [AGAdmins]; GRANT CREATE AVAILABILITY GROUP TO [AGAdmins]; GRANT CREATE ENDPOINT TO [AGAdmins]; ALTER SERVER ROLE [AGAdmins] ADD MEMBER [JohnDoe]; ...
Converting Relational to Graph Databases
... Figure 5: An example of graph database in r such that: t1 [A] = v1 , t2 [B] = v2 , and A is n2n, and (iii) there is a pair of joinable tuples t1 and t2 of relations R1 and R2 respectively in r such that: t1 [A] = v1 , t2 [B] = v2 , A and B are not n2n, and there is other no tuple t3 in r that is joi ...
... Figure 5: An example of graph database in r such that: t1 [A] = v1 , t2 [B] = v2 , and A is n2n, and (iii) there is a pair of joinable tuples t1 and t2 of relations R1 and R2 respectively in r such that: t1 [A] = v1 , t2 [B] = v2 , A and B are not n2n, and there is other no tuple t3 in r that is joi ...
Chapter 9
... required when new database system is replacing an old system. – DBMS normally has utility that loads existing files into new database. May be possible to convert and use application programs from old system for use by new system. ...
... required when new database system is replacing an old system. – DBMS normally has utility that loads existing files into new database. May be possible to convert and use application programs from old system for use by new system. ...
