公开(公告)号：US08904230B2

公开(公告)日：2014-12-02

申请号：US13901485

申请日：2013-05-23

Applicant: NetApp, Inc.

Inventor： Atul Goel ,  Yan Li

IPC: G06F12/02 ,  G06F11/10 ,  H03M13/37

CPC classification number: G06F12/02 ,  G06F11/1096 ,  H03M13/3761

Abstract: A storage server resizes an array of mass storage devices and distributes data blocks stored in the array of mass storage devices evenly in a declustered organization across the resized array of mass storage devices. Resizing the array of mass storage devices may include adding a new mass storage device to the array or removing a mass storage device from the array. During resizing a data block is moved from one mass storage device to another mass storage device to minimize the imbalance of parity groups shared by the new mass storage devices in the array, as well as minimize the number of data blocks to be moved to uniformly balance the load across the new mass storage device.

Abstract translation: 存储服务器调整大容量存储设备阵列的大小，并将存储在大容量存储设备阵列中的数据块均匀地分布在经过调整大小的大容量存储设备阵列的分散组织中。 调整大容量存储设备阵列的大小可以包括向阵列添加新的大容量存储设备或从阵列中移除大容量存储设备。 在调整大小时，数据块从一个大容量存储设备移动到另一个大容量存储设备，以最小化阵列中新的大容量存储设备共享的奇偶校验组的不平衡，并将要移动的数据块的数量最小化以均匀平衡 新的大容量存储设备的负载。