公开(公告)号：US09495104B2

公开(公告)日：2016-11-15

申请号：US14592831

申请日：2015-01-08

Applicant: VMware, Inc.

Inventor： Sandeep Uttamchandani ,  Li Zhou ,  Fei Meng ,  Deng Liu

IPC: G06F3/06 ,  G06F12/08 ,  G06F9/50 ,  G06F12/02 ,  G06F9/455

CPC classification number: G06F3/061 ,  G06F3/0667 ,  G06F3/0685 ,  G06F9/5016 ,  G06F12/0246 ,  G06F12/0873 ,  G06F2009/45579 ,  G06F2212/152 ,  G06F2212/222 ,  G06F2212/6042

Abstract: Techniques for automatically allocating space in a flash storage-based cache are provided. In one embodiment, a computer system collects I/O trace logs for a plurality of virtual machines or a plurality of virtual disks and determines cache utility models for the plurality of virtual machines or the plurality of virtual disks based on the I/O trace logs. The cache utility model for each virtual machine or each virtual disk defines an expected utility of allocating space in the flash storage-based cache to the virtual machine or the virtual disk over a range of different cache allocation sizes. The computer system then calculates target cache allocation sizes for the plurality of virtual machines or the plurality of virtual disks based on the cache utility models and allocates space in the flash storage-based cache based on the target cache allocation sizes.

公开(公告)号：US20150067262A1

公开(公告)日：2015-03-05

申请号：US14015784

申请日：2013-08-30

Applicant: VMware, Inc.

Inventor： Sandeep Uttamchandani ,  Li Zhou ,  Fei Meng ,  Deng Liu

IPC: G06F12/08

CPC classification number: G06F12/0848 ,  G06F9/50 ,  G06F9/5016 ,  G06F9/5077 ,  G06F12/08

Abstract: Systems and techniques are described for thread cache allocation. A described technique includes monitoring input and output accesses for a plurality of threads executing on a computing device that includes a cache comprising a quantity of memory blocks, determining a respective reuse intensity for each of the threads, determining a respective read ratio for each of the threads, determining a respective quantity of memory blocks for each of the partitions by optimizing a combination of cache utilities, each cache utility being based on the respective reuse intensity, the respective read ratio, and a respective hit ratio for a particular partition, and resizing one or more of the partitions to be equal to the respective quantity of the memory blocks for the partition.

Abstract translation: 系统和技术描述为线程高速缓存分配。 所描述的技术包括监视在计算设备上执行的多个线程的输入和输出访问，所述线程包括包含大量存储器块的高速缓存，为每个线程确定相应的重用强度，确定每个线程的相应读取比率 线程，通过优化高速缓存实用程序的组合来确定每个分区的相应数量的存储器块，每个高速缓存实用程序基于相应的重用强度，相应的读取比率以及特定分区的相应命中率，以及调整大小 一个或多个分区等于分区的存储块的相应数量。

公开(公告)号：US20150006788A1

公开(公告)日：2015-01-01

申请号：US13931409

申请日：2013-06-28

Applicant: VMware, Inc.

Inventor： Deng Liu ,  Sandeep Uttamchandani ,  Li Zhou ,  Mayank Rawat

IPC: G06F3/06

CPC classification number: G06F3/0685 ,  G06F3/0604 ,  G06F3/0611 ,  G06F3/0655 ,  G06F3/0659 ,  G06F9/45558 ,  G06F2009/45579 ,  G06F2212/217

Abstract: Techniques for utilizing flash storage as an extension of hard disk (HDD) based storage are provided. In one embodiment, a computer system can store a first subset of blocks of a logical file in a first physical file residing on a flash storage tier, and a second subset of blocks of the logical file in a second physical file residing on an HDD storage tier. The computer system can then receive an I/O request directed to one or more blocks of the logical file and process the I/O request by accessing the flash storage tier or the HDD storage tier, the accessing being based on whether the one or more blocks are part of the first subset of blocks stored in the first physical file.

Abstract translation: 提供了使用闪存作为基于硬盘（HDD）的存储的扩展的技术。 在一个实施例中，计算机系统可以将存储在闪存存储层上的第一物理文件中的逻辑文件的块的第一子集存储在驻留在HDD存储器上的第二物理文件中的逻辑文件块的第二子集 层。 计算机系统然后可以接收针对逻辑文件的一个或多个块的I / O请求，并通过访问闪存存储层或HDD存储层来处理该I / O请求，该访问基于该一个或多个 块是存储在第一个物理文件中的块的第一个子集的一部分。

公开(公告)号：US20150006787A1

公开(公告)日：2015-01-01

申请号：US13931309

申请日：2013-06-28

Applicant: VMware, Inc.

Inventor： Deng Liu ,  Wei Zhang ,  Xiaoyun Zhu ,  Mayank Rawat ,  Sandeep Uttamchandani ,  Li Zhou ,  Jianzhe Tai

IPC: G06F3/06

CPC classification number: G06F3/0685 ,  G06F3/0604 ,  G06F3/061 ,  G06F3/0649

Abstract: Techniques for dynamically managing the placement of blocks of a logical file between a flash storage tier and an HDD storage tier are provided. In one embodiment, a computer system can collect I/O statistics pertaining to the logical file, where a first subset of blocks of the logical file are stored on the flash storage tier and where a second subset of blocks of the logical file are stored on the HDD storage tier. The computer system can further generate a heat map for the logical file based on the I/O statistics, where the heat map indicates, for each block of the logical file, the number of times the block has been accessed. The computer system can then identify, using the heat map, one or more blocks of the logical file as being performance-critical blocks, and can move data between the flash and HDD storage tiers such that the performance-critical blocks are placed on the flash storage tier.

Abstract translation: 提供了用于在闪存存储层和HDD存储层之间动态管理逻辑文件块的位置的技术。 在一个实施例中，计算机系统可以收集与逻辑文件相关的I / O统计信息，其中逻辑文件的块的第一子集存储在闪存存储层上，并且逻辑文件的块的第二子集存储在 HDD存储层。 计算机系统可以基于I / O统计信息进一步生成用于逻辑文件的热图，其中热图针对逻辑文件的每个块指示块已经被访问的次数。 计算机系统然后可以使用热图将逻辑文件的一个或多个块识别为性能关键块，并且可以在闪存和HDD存储层之间移动数据，使得性能关键块被放置在闪存上 存储层。

公开(公告)号：US20140297780A1

公开(公告)日：2014-10-02

申请号：US13850985

申请日：2013-03-26

Applicant: VMware, Inc.

Inventor： Li Zhou ,  Samdeep Nayak ,  Sandeep Uttamchandani ,  Sanjay Acharya

IPC: H04L29/08

CPC classification number: H04L67/2847

Abstract: The instant disclosure describes embodiments of a system and method for migrating virtual machine (VM)-specific content cached in a solid state drive (SSD) attached to an original host. During operation, the original host receives event indicating an upcoming migration of a VM to a destination host. In response, the original host transmits a set of metadata associated with the SSD cache to the destination host. The metadata indicates a number of data blocks stored in the SSD cache, thereby allowing the destination host to pre-fetch data blocks specified in the metadata from a storage shared by the original host and the destination host. Subsequently, the original host receives a power-off event for the VM, and transmits a dirty block list to the destination. The dirty block list specifies one or more data blocks that have changed since the transmission of the metadata.

Abstract translation: 本公开描述用于迁移在连接到原始主机的固态驱动器（SSD）中缓存的虚拟机（VM）特定内容的系统和方法的实施例。 在操作期间，原始主机接收到指示即将到达目的地主机的VM迁移的事件。 作为响应，原始主机将与SSD高速缓存相关联的一组元数据发送到目的地主机。 元数据指示存储在SSD高速缓存中的多个数据块，从而允许目的地主机从由原始主机和目的地主机共享的存储器中预取在元数据中指定的数据块。 随后，原始主机接收到VM的电源关闭事件，并将脏块列表发送到目的地。 脏块列表指定自元数据传输以来已经改变的一个或多个数据块。