When iterators are used, many operations become _______
When iterators are used, many operations become _______
.________ manage the potentially competing requests from different processors
.________ manage the potentially competing requests from different processors
One benefit of a nested-loop join is that it fits well into an _____ structure
One benefit of a nested-loop join is that it fits well into an _____ structure
The__________ one-argument operations need to consider all or most of the tuples in memory at once
The__________ one-argument operations need to consider all or most of the tuples in memory at once
It is the responsibility of the ______ to let processes get the memory that they need for reduction of the delayed and unsatisfiable requests
It is the responsibility of the ______ to let processes get the memory that they need for reduction of the delayed and unsatisfiable requests
parallel computers all have some communications facility for passing information among __________.
parallel computers all have some communications facility for passing information among __________.
NUMA stands for__________.
NUMA stands for__________.
._______ will initialize a main-memory structure to represent a set of tuples of R
._______ will initialize a main-memory structure to represent a set of tuples of R
In _________each processor has access to all the memory of all the processors.
In _________each processor has access to all the memory of all the processors.
In most of the relational database management system, the buffer manager controls_____ memory directly
In most of the relational database management system, the buffer manager controls_____ memory directly
The basic outline of a Heuristic Algebraic Optimization Algorithm is given below.
1. Break up any SELECT operations by means of conjunctive operations into a cascade of SELECT operations.
2. Move each and every SELECT operation as far down the query tree as is allowed by the attributes which are involved in the select condition.
The basic outline of a Heuristic Algebraic Optimization Algorithm is given below.
1. Break up any SELECT operations by means of conjunctive operations into a cascade of SELECT operations.
2. Move each and every SELECT operation as far down the query tree as is allowed by the attributes which are involved in the select condition.
.In___________architecture all processors have their own memory and their own disk or disks,
.In___________architecture all processors have their own memory and their own disk or disks,
The_________ operation is especially quite expensive
The_________ operation is especially quite expensive
A relation is said to be _______ if its tuples are packed into the least blocks that can possibly hold those tuples
A relation is said to be _______ if its tuples are packed into the least blocks that can possibly hold those tuples
One of the chief heuristic rules is that before applying the JOIN or other binary operations, one must apply _________ and ________operations.
One of the chief heuristic rules is that before applying the JOIN or other binary operations, one must apply _________ and ________operations.
.________ will release the memory
.________ will release the memory
Physical query strategy is made from _________
Physical query strategy is made from _________
External Sorting is the essential algorithm for implementation of _______operation
External Sorting is the essential algorithm for implementation of _______operation
The buffer manager allocates buffers in _______ memory
The buffer manager allocates buffers in _______ memory
________operationsrequire neither an entire relation, nor a large part of it, in memory at once
________operationsrequire neither an entire relation, nor a large part of it, in memory at once
In_________architecture, every processor has its own memory, which is not accessible directly from other processors
In_________architecture, every processor has its own memory, which is not accessible directly from other processors
In __________algorithm two passes are usually enough, even for very large relations
In __________algorithm two passes are usually enough, even for very large relations
Buffer management architectures are broadly divided into______ main categories:
Buffer management architectures are broadly divided into______ main categories:
The shared-nothing architecture is the most commonly used architecture for ___________database systems.
The shared-nothing architecture is the most commonly used architecture for ___________database systems.
The ________ operation is one of the lengthiest operations in query processing
The ________ operation is one of the lengthiest operations in query processing