A Framework for Building Unobtrusive Disk Maintenance Applications (CMU-CS-03-192)
نویسندگان
چکیده
This paper describes a programming framework for clean construction of disk maintenance applications. They can use it to expose the disk activity to be done, and then process completed requests as they are reported. The system ensures that these applications make steady forward progress without competing for disk access with a system’s primary applications. It opportunistically completes maintenance requests by using disk idle time and freeblock scheduling. In this paper, three disk maintenance applications (backup, write-back cache destaging, and disk layout reorganization) are adapted to the system support and evaluated on a FreeBSD implementation. All are shown to successfully execute in busy systems with minimal (e.g., 2%) impact on foreground disk performance. In fact, by modifying FreeBSD’s cache to write dirty blocks for free, the average read cache miss response time is decreased by 15–30%. For non-volatile caches, the reduction is almost 50%.
منابع مشابه
A framework for building unobtrusive disk maintenance applications
This paper describes a programming model and system support for clean construction of disk maintenance applications. Such applications expose the disk activity to be done, and then process completed requests as they are reported. The system ensures that these applications make steady forward progress without competing for disk access with a system’s primary applications. It opportunistically co...
متن کاملA Framework for Building Unobtrusive Disk Maintenance Applications (Awarded Best Student Paper!)
This paper describes a programming model and system support for clean construction of disk maintenance applications. Such applications expose the disk activity to be done, and then process completed requests as they are reported. The system ensures that these applications make steady forward progress without competing for disk access with a system's primary applications. It opportunistically co...
متن کاملA Two-Tiered Software Architecture for Automated Tuning of Disk Layouts (CMU-CS-03-130)
Many heuristics have been developed for adapting on-disk data layouts to expected and observed workload characteristics. This paper describes a two-tiered software architecture for cleanly and extensibly combining such heuristics. In this architecture, each heuristic is implemented independently and an adaptive combiner merges their suggestions based on how well they work in the given environme...
متن کاملAtropos: A Disk Array Volume Manager for Orchestrated Use of Disks (CMU-PDL-03-101)
The Atropos logical volume manager allows applications to exploit characteristics of its underlying collection of disks. It stripes data in track-sized units and explicitly exposes the boundaries, allowing applications to maximize efficiency for sequential access patterns even when they share the array. Further, it supports efficient diagonal access to blocks on adjacent tracks, allowing applic...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2015