disk access

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Related to disk access: Disk access time

disk access

Reading and writing a magnetic disk or optical disc. The most time-consuming part of the operation is moving the read/write head. The access time is the average of the time it takes to position the head over the requested track. See defragment and access time.

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The disk access time is the time to transfer all blocks of the fragment from disk to buffer and is computed as (time to transfer a block of records) x (transaction frequency) x (cardinality) x (fragment length).

A methodology for vertically partitioning in a multi-relation database environment

the assumption that a random disk access will be required for each record identifier for each term, as if inverted lists were stored as a linked list on disk (They should be stored contiguously or at the very least in a linked list of blocks.

Inverted Files Versus Signature Files for Text Indexing

Running Speed Disk keeps the hard disk access time from slowing down by correcting the file fragmentation that occurs with use.

Chemputing down memory lane II

DOS keeps track of where everything is located, but one result is to slow disk access time considerably.

Utility software programs to unclutter your PC

Ideally, he says, laptop software should only require disk access when the program loads or when the user saves data.

Laptop-friendly software

Then the time elapsed for each activity such as processing, disk access, etc.

Cost and allocation methods for computer services

CACHING AND OTHER DISK ACCESS AVOIDANCE TECHNIQUES ON PERSONAL COMPUTERS Disk caching is a technique for keeping the most recently used disk blocks in an associative memory in main storage, with the expectation that those blocks will be used again in the near future.

Caching and other disk access avoidance techniques on personal computers

Dual-ported disk drives connect to two of the nodes, providing a secondary redundant disk access path in case one node fails.

Maximizing system availability with Serial Attached SCSI

Such an index aims to minimise its memory footprint and CPU usage, whereas a disk-resident index focuses on reducing its disk access, since disks offer a slow medium for data access.

Impact of key locality on database performance

1 GB Hard disk access time 16 ms CD-ROM transfer rate 8x (1.

Looking for a multimedia computer? Consider the state-of-the-art and currently available features

The bad news is that I lost the ability to use SmartDrive, the data-caching Microsoft program that speeds up disk access.