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1. 发明申请

US20120159094A1 ASSIGNING READ REQUESTS BASED ON BUSYNESS OF DEVICES 有权
标题翻译：根据设备的繁琐准备阅读要求
公开(公告)号：US20120159094A1
公开(公告)日：2012-06-21
申请号：US12975242
申请日：2010-12-21
申请人： Willliam H. Bridge, JR. , Prasad Bagal , Lavina Jain , Rajiv Wickremesinghe , Darshan Nagarajappa , Richard L. Long
发明人： Willliam H. Bridge, JR. , Prasad Bagal , Lavina Jain , Rajiv Wickremesinghe , Darshan Nagarajappa , Richard L. Long
IPC分类号： G06F12/00 , G06F11/20
CPC分类号： G06F3/0617 , G06F3/0653 , G06F3/0683 , G06F11/2053 , G06F11/2094 , G06F11/3433
摘要： Techniques are provided for assigning read requests to storage devices in a manner that reduces the likelihood that any storage device will become overloaded or underutilized. Specifically, a read-request handler assigns read requests that are directed to each particular item among the storage devices that have copies of the item based on how busy each of those storage devices is. Consequently, even though certain storage devices may have copies of the same item, there may be times during which one storage device is assigned a disproportionate number of the reads of the item because the other storage device is busy with read requests for other items, and there may be other times during which other storage device is assigned a disproportionate number of the reads of the item because the one storage device is busy with read request for other items. Various techniques for estimating the busyness of storage devices are provided, including fraction-based estimates, interval-based estimates, and the response-time-based estimates. Techniques for smoothing those estimates, and for handicapping devices, are also provided.
摘要翻译：提供了以减少任何存储设备将变得过载或未充分利用的可能性的方式将读请求分配给存储设备的技术。具体地说，读取请求处理程序根据这些存储设备的忙碌来分配针对具有项目副本的存储设备中的每个特定项目的读取请求。因此，尽管某些存储设备可能具有相同项目的副本，但是由于另一个存储设备忙于对其他项目的读取请求，所以可能存在一个存储设备被分配了不成比例的该项目的读取的次数，以及可能存在其他存储设备被分配了不成比例数量的项目的其他时间，因为一个存储设备忙于对其他项目的读取请求。提供了用于估计存储设备的繁忙性的各种技术，包括基于分数的估计，基于间隔的估计和基于响应时间的估计。还提供了用于平滑这些估计的技术和用于障碍装置的技术。

2. 发明授权

US09141508B2 Assigning read requests based on busyness of devices 有权
标题翻译：根据设备的忙碌分配读取请求
公开(公告)号：US09141508B2
公开(公告)日：2015-09-22
申请号：US12975242
申请日：2010-12-21
申请人： Willliam H. Bridge, Jr. , Prasad Bagal , Lavina Jain , Rajiv Wickremesinghe , Darshan Nagarajappa , Richard L. Long
发明人： Willliam H. Bridge, Jr. , Prasad Bagal , Lavina Jain , Rajiv Wickremesinghe , Darshan Nagarajappa , Richard L. Long
IPC分类号： G06F12/00 , G06F11/20 , G06F11/34
CPC分类号： G06F3/0617 , G06F3/0653 , G06F3/0683 , G06F11/2053 , G06F11/2094 , G06F11/3433
摘要： Techniques are provided for assigning read requests to storage devices in a manner that reduces the likelihood that any storage device will become overloaded or underutilized. Specifically, a read-request handler assigns read requests that are directed to each particular item among the storage devices that have copies of the item based on how busy each of those storage devices is. Consequently, even though certain storage devices may have copies of the same item, there may be times during which one storage device is assigned a disproportionate number of the reads of the item because the other storage device is busy with read requests for other items, and there may be other times during which other storage device is assigned a disproportionate number of the reads of the item because the one storage device is busy with read request for other items. Various techniques for estimating the busyness of storage devices are provided, including fraction-based estimates, interval-based estimates, and the response-time-based estimates. Techniques for smoothing those estimates, and for handicapping devices, are also provided.
摘要翻译：提供了以减少任何存储设备将变得过载或未充分利用的可能性的方式将读请求分配给存储设备的技术。具体地说，读取请求处理程序根据这些存储设备的忙碌来分配针对具有项目副本的存储设备中的每个特定项目的读取请求。因此，尽管某些存储设备可能具有相同项目的副本，但是由于另一个存储设备忙于对其他项目的读取请求，所以可能存在一个存储设备被分配了不成比例的该项目的读取的次数，以及可能存在其他存储设备被分配了不成比例数量的项目的其他时间，因为一个存储设备忙于对其他项目的读取请求。提供了用于估计存储设备的繁忙性的各种技术，包括基于分数的估计，基于间隔的估计和基于响应时间的估计。还提供了用于平滑这些估计的技术和用于障碍装置的技术。

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