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公开(公告)号：WO0013078A9
公开(公告)日：2000-10-12
申请号：PCT/US9918601
申请日：1999-08-16
Applicant: EMC CORP
Inventor： BACHMAT EITAN , OFEK YUVAL
CPC classification number: G06F3/061 , G06F3/0634 , G06F3/0653 , G06F3/0689 , G06F11/3433 , G06F11/3452 , G06F11/3485 , G06F2201/88 , G06F2201/885 , G11B17/22
Abstract: Load balancing of activities on physical disk storage devices is accomplished by monitoring reading and writing operations to blocks of contiguous storage locations on the physical disk storage devices. A list of exchangeable pairs of blocks is developed based on size and function. Statistics accumulated over an interval are then used to obtain access activity values for each block and each physical disk drive. A statistical analysis leads to a selection of one block pair. After testing to determine any adverse effect of making that change, the exchange is made to more evenly distribute the loading on individual physical disk storage devices.
Abstract translation: 物理磁盘存储设备上活动的负载平衡通过监视对物理磁盘存储设备上连续存储位置块的读写操作来完成。 根据尺寸和功能开发可交换块对列表。 然后使用一段时间内累积的统计信息来获取每个块和每个物理磁盘驱动器的访问活动值。 统计分析导致选择一个块对。 经过测试以确定进行此更改的任何不利影响后，交换机将更均匀地分配各个物理磁盘存储设备上的负载。
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公开(公告)号：DE69921289D1
公开(公告)日：2004-11-25
申请号：DE69921289
申请日：1999-08-16
Applicant: EMC CORP
Inventor： BACHMAT EITAN , OFEK YUVAL
Abstract: Load balancing of activities on physical disk storage devices is accomplished by monitoring reading and writing operations to blocks of contiguous storage locations on the physical disk storage devices. A list of exchangeable pairs of blocks is developed based on size and function. Statistics accumulated over an interval are then used to obtain access activity values for each block and each physical disk drive. A statistical analysis leads to a selection of one block pair. After testing to determine any adverse effect of making that change, the exchange is made to more evenly distribute the loading on individual physical disk storage devices.
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公开(公告)号：EP1018072A4
公开(公告)日：2003-01-02
申请号：EP98948407
申请日：1998-09-21
Applicant: EMC CORP
Inventor： MASON ROBERT S JR , OFEK YUVAL , VISHLITZKY NATAN , ARNON DAN , BACHMAT EITAN
CPC classification number: G06F11/2066 , G06F3/0601 , G06F11/2069 , G06F2003/0697
Abstract: The invention relates generally to mass storage systems, and in particular to mass storage systems in which stored logical volumes are duplicated in mirrored form. The system includes a method for dynamically adjusting the mirror service policy for a disk drive system by periodically collecting statistics (101) describing the reading and writing of data to mirrored logical volumes of the system in successive time periods and determining, from time to time, from the collected statistics, whether the mirror service policy should continue or should change (104). In particular, the system takes into account activity levels at the physical devices and results in more efficient accessing of logical volume pairs as well as a better balance of loading and accessing the logical volumes.
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公开(公告)号：DE69921289T2
公开(公告)日：2005-11-03
申请号：DE69921289
申请日：1999-08-16
Applicant: EMC CORP
Inventor： BACHMAT EITAN , OFEK YUVAL
Abstract: Load balancing of activities on physical disk storage devices is accomplished by monitoring reading and writing operations to blocks of contiguous storage locations on the physical disk storage devices. A list of exchangeable pairs of blocks is developed based on size and function. Statistics accumulated over an interval are then used to obtain access activity values for each block and each physical disk drive. A statistical analysis leads to a selection of one block pair. After testing to determine any adverse effect of making that change, the exchange is made to more evenly distribute the loading on individual physical disk storage devices.
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