公开(公告)号：US09052937B2

公开(公告)日：2015-06-09

申请号：US13779051

申请日：2013-02-27

Applicant: VMware, Inc.

Inventor： Krishna Yadappanavar ,  Murali Vilayannur ,  Faraz Shaikh

IPC: G06F9/46 ,  G06F9/455 ,  G06F9/50

CPC classification number: G06F9/45533 ,  G06F3/061 ,  G06F3/0659 ,  G06F3/0671 ,  G06F9/45558 ,  G06F9/50 ,  G06F9/545 ,  G06F2009/45579

Abstract: Input/output operations (IOs) are issued to a storage system using request queues that are each maintained for a resource targeted by the IOs. When an IO is requested, the target resource for the IO is first identified. If a request queue is maintained for the target resource, the IO is added to the request queue and the IO is issued to the storage system as the target resource becomes available. The availability of the target resource may be determined through periodic checks or by monitoring completions of IOs issued out of the request queue.

Abstract translation: 输入/输出操作（IO）将使用针对IO所针对的资源维护的请求队列发给存储系统。 当请求IO时，首先识别IO的目标资源。 如果为目标资源维护请求队列，则IO将被添加到请求队列中，并且当目标资源变为可用时，将IO发送到存储系统。 目标资源的可用性可以通过定期检查或通过监视从请求队列中发出的IO的完成来确定。

公开(公告)号：US09448728B2

公开(公告)日：2016-09-20

申请号：US14839163

申请日：2015-08-28

Applicant: VMware, Inc.

Inventor： Faraz Shaikh ,  Murali Vilayannur ,  Satyam B. Vaghani ,  Kiran Joshi

IPC: G06F3/06 ,  G06F17/30 ,  G06F9/455 ,  G06F12/02

CPC classification number: G06F3/0608 ,  G06F3/0631 ,  G06F3/0652 ,  G06F3/0665 ,  G06F3/067 ,  G06F9/45533 ,  G06F9/45558 ,  G06F12/0253 ,  G06F12/0261 ,  G06F12/0269 ,  G06F12/0276 ,  G06F17/30138 ,  G06F17/30194 ,  G06F17/30233 ,  G06F2009/45579 ,  G06F2212/1044 ,  G06F2212/154

Abstract: Free storage blocks previously allocated to a logical block device are released back to an underlying storage system supporting the logical block device in a manner that does not conflict with write operations that may be issued to the free storage blocks at about the same time. According to a first technique, write operations on the same storage blocks to be released are paused until the underlying storage system has completed the releasing operation or, if the write operations are issued earlier than when the underlying storage system actually performs the releasing operation, such storage blocks are not released. According to a second technique, a special file is allocated the free storage blocks, which are then made available for safe releasing.

公开(公告)号：US09116726B2

公开(公告)日：2015-08-25

申请号：US13630099

申请日：2012-09-28

Applicant: VMware, Inc.

Inventor： Faraz Shaikh ,  Krishna Yadappanavar ,  Murali Vilayannur

IPC: G06F9/455 ,  G06F12/02

CPC classification number: G06F9/455 ,  G06F9/45533 ,  G06F12/02 ,  G06F17/30233 ,  G06F2201/815 ,  G06F2201/84

Abstract: A virtualized computer system employs a virtual disk. Multiple snapshots of the virtual disk can be created. After a snapshot is created, writes to the virtual disk are captured in delta disks. Two snapshots are consolidated by updating block references in snapshot meta data. Block reference update takes advantage of the fact that blocks for the two snapshot are managed within the same storage container and, therefore, can be moved in the snapshot logical space without incurring data copy operations. Consolidation of delta disks also gracefully handles failures during the consolidation operation and can be restarted anew after the system has recovered from failure.

Abstract translation: 虚拟化计算机系统采用虚拟磁盘。 可以创建虚拟磁盘的多个快照。 创建快照后，对增量磁盘捕获到虚拟磁盘的写入。 通过更新快照元数据中的块引用来合并两个快照。 块参考更新利用了两个快照的块在相同的存储容器内进行管理，因此可以在快照逻辑空间中移动，而不会导致数据复制操作。 增量磁盘的合并也可以适当地处理整合操作中的故障，并且可以在系统从故障恢复之后重新启动。

公开(公告)号：US09038066B2

公开(公告)日：2015-05-19

申请号：US13631418

申请日：2012-09-28

Applicant: VMware, Inc.

Inventor： Krishna Yadappanavar ,  Faraz Shaikh ,  Murali Vilayannur

IPC: G06F9/455 ,  G06F3/06

CPC classification number: G06F3/0611 ,  G06F3/0667 ,  G06F3/067 ,  G06F3/0689

Abstract: A virtualized computer system employs a virtual disk with a space efficient (SE) format to store data for virtual machines running therein. Data within a virtual disk with a SE format is stored in a grain, where multiple grains are included in a storage block. Writes to a grain within shared storage block in a virtual disk with an SE format are serviced by allocating a new grain and storing the write data to the new grain. Metadata associated with the client that transmitted the write request to the virtual disk is then updated to point to the new grain instead of the grain within the shared storage block.

Abstract translation: 虚拟化计算机系统采用具有空间效率（SE）格式的虚拟磁盘来存储在其中运行的虚拟机的数据。 具有SE格式的虚拟磁盘内的数据被存储在存储块中包含多个粒子的粒子中。 通过分配新的颗粒并将写入数据存储到新的颗粒，可以对具有SE格式的虚拟磁盘中的共享存储块内的纹理进行写入。 然后，将与客户端相关联的发送写入请求的元数据更新为指向新的粒度，而不是共享存储块中的粒度。

公开(公告)号：US09032176B2

公开(公告)日：2015-05-12

申请号：US14220279

申请日：2014-03-20

Applicant: VMware, Inc.

Inventor： Faraz Shaikh ,  Murali Vilayannur

IPC: G06F12/00 ,  G06F3/06 ,  G06F12/02 ,  G06F9/455 ,  G06F12/08 ,  G06F11/14 ,  G06F17/30

CPC classification number: G06F3/0664 ,  G06F3/0604 ,  G06F3/064 ,  G06F3/0671 ,  G06F3/0689 ,  G06F9/455 ,  G06F9/45533 ,  G06F9/45558 ,  G06F11/1435 ,  G06F11/1484 ,  G06F12/02 ,  G06F12/08 ,  G06F17/30312 ,  G06F2009/45579 ,  G06F2206/1004

Abstract: A virtualized storage stack includes logical layers above the physical storage layer. Each logical layer allocates data blocks, and the data block allocation is propagated down to the physical storage layer. To facilitate contiguous storage, each layer of the virtualized storage stack maintains additional metadata associated with data blocks. For each data block, the metadata indicates whether the data block is free, provisioned and includes a tag that indicates when the data block was first written. Data blocks that were first written as part of the same write request share the same tag, and are mostly guaranteed to be physically co-located. Block allocations that reuse data blocks having the same tag are preferred. Such preference increases the likelihood of the blocks being contiguous in the physical storage as these blocks were allocated as part of the same first write.

Abstract translation: 虚拟化存储堆栈包括物理存储层之上的逻辑层。 每个逻辑层分配数据块，数据块分配向下传播到物理存储层。 为了便于连续存储，虚拟化存储堆栈的每一层维护与数据块相关联的附加元数据。 对于每个数据块，元数据指示数据块是否空闲，被提供，并且包括指示数据块何时被首次写入的标签。 首次写入相同写入请求的数据块共享相同的标签，并且主要保证在物理上位于同一位置。 重用具有相同标签的数据块的块分配是首选的。 这样的偏好增加了块在物理存储中是连续的可能性，因为这些块被分配为相同的第一次写入的一部分。