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    • 5. 发明申请
    • TECHNIQUES FOR DYNAMICALLY RELOCATING VIRTUAL DISK FILE BLOCKS BETWEEN FLASH STORAGE AND HDD-BASED STORAGE
    • 用于动态存储和基于硬盘的存储之间的虚拟磁盘文件块的动态技术
    • US20150006787A1
    • 2015-01-01
    • US13931309
    • 2013-06-28
    • VMware, Inc.
    • Deng LiuWei ZhangXiaoyun ZhuMayank RawatSandeep UttamchandaniLi ZhouJianzhe Tai
    • G06F3/06
    • G06F3/0685G06F3/0604G06F3/061G06F3/0649
    • 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.
    • 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。
    • 10. 发明授权
    • Hybrid locking using network and on-disk based schemes
    • 使用网络和基于磁盘的方案进行混合锁定
    • US09130821B2
    • 2015-09-08
    • US14034171
    • 2013-09-23
    • VMware, Inc.
    • Mayank RawatJinyuan LiMurali VilayannurDaniel J. Scales
    • H04L12/24G06F17/30
    • H04L41/00G06F17/30171
    • A method of acquiring a lock by a node, on a shared resource in a system of a plurality of interconnected nodes, is disclosed. Each node that competes for a lock on the shared resource maintains a list of locks currently owned by the node. A lock metadata is maintained on a shared storage that is accessible to all nodes that may compete for locks on shared resources. A heartbeat region is maintained on a shared resource corresponding to each node so nodes can register their liveness. A lock state is maintained in the lock metadata in the shared storage. A lock state may indicate lock held exclusively, lock free or lock in managed mode. If the lock is held in the managed mode, the ownership of the lock can be transferred to another node without a use of a mutual exclusion primitive such as the SCSI reservation.
    • 公开了一种在多个互连节点的系统中的共享资源上获取节点锁定的方法。 竞争共享资源上的锁的每个节点维护节点当前拥有的锁的列表。 锁定元数据被维护在可以在共享资源上竞争锁定的所有节点可访问的共享存储器上。 心跳区域保持在对应于每个节点的共享资源上,所以节点可以注册其活动。 在共享存储器中的锁元数据中保持锁定状态。 锁定状态可以指示专门锁定,锁定或锁定在托管模式。 如果锁定在托管模式下,则锁的所有权可以传输到另一个节点,而不使用互斥原语,如SCSI保留。