NDLI: DCD—disk caching disk:a new approach for boosting I/O performance

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Volume 24, Issue 5, Dec. 1996

Volume 24, Issue 4, Sept. 1996

Volume 24, Issue 3, June 1 1996

Volume 24, Issue 2, May 1996

Using hybrid branch predictors to improve branch prediction accuracy in the presence of context switches

An analysis of dynamic branch prediction schemes on system workloads

Correlation and aliasing in dynamic branch predictors

Decoupled hardware support for distributed shared memory

Evaluation of design alternatives for a multiprocessor microprocessor

Memory bandwidth limitations of future microprocessors

Missing the memory wall

Don't use the page number, but a pointer to it

The difference-bit cache

Understanding application performance on shared virtual memory systems

Application and architectural bottlenecks in large scale distributed shared memory machines

Increasing cache port efficiency for dynamic superscalar microprocessors

High-bandwidth address translation for multiple-issue processors

DCD—disk caching disk

Polling watchdog

Exploiting choice

Evaluation of multithreaded uniprocessors for commercial application environments

Performance comparison of ILP machines with cycle time evaluation

Rotating combined queueing (RCQ)

A router architecture for real-time point-to-point networks

Coherent network interfaces for fine-grain communication

Informing memory operations

Instruction prefetching of systems codes with layout optimized for reduced cache misses

Compiler and hardware support for cache coherence in large-scale multiprocessors

Early experience with message-passing on the SHRIMP multicomputer

Volume 24, Issue 1, March 1996

DCD—disk caching disk:a new approach for boosting I/O performance

Content Provider	ACM Digital Library
Author	Hu, Yiming Yang, Qing
Abstract	This paper presents a novel disk storage architecture called DCD, Disk Caching Disk, for the purpose of optimizing I/O performance. The main idea of the DCD is to use a small log disk, referred to as cache-disk, as a secondary disk cache to optimize write performance. While the cache-disk and the normal data disk have the same physical properties, the access speed of the former differs dramatically from the latter because of different data units and different ways in which data are accessed. Our objective is to exploit this speed difference by using the log disk as a cache to build a reliable and smooth disk hierarchy. A small RAM buffer is used to collect small write requests to form a log which is transferred onto the cache-disk whenever the cache-disk is idle. Because of the temporal locality that exists in office/engineering work-load environments, the DCD system shows write performance close to the same size RAM (i.e. solid-state disk) for the cost of a disk. Moreover, the cache-disk can also be implemented as a logical disk in which case a small portion of the normal data disk is used as the log disk. Trace-driven simulation experiments are carried out to evaluate the performance of the proposed disk architecture. Under the office/engineering work-load environment, the DCD shows superb disk performance for writes as compared to existing disk systems. Performance improvements of up to two orders of magnitude are observed in terms of average response time for write operations. Furthermore, DCD is very reliable and works at the device or device driver level. As a result, it can be applied directly to current file systems without the need of changing the operating system.
Starting Page	169
Ending Page	178
Page Count	10
File Format	PDF
ISSN	01635964
DOI	10.1145/232974.232991
Journal	ACM SIGARCH Computer Architecture News (CARN)
Volume Number	24
Issue Number	2
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1981-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article

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