公开(公告)号：US20150234857A1

公开(公告)日：2015-08-20

申请号：US14702568

申请日：2015-05-01

Applicant: VMware, Inc.

Inventor： Jinyuan LI ,  Murali VILAYANNUR ,  Mayank RAWAT

IPC: G06F17/30 ,  G06F11/07

CPC classification number: G06F16/1774 ,  G06F11/0712 ,  G06F11/0757 ,  G06F16/951

Abstract: A network-based method for managing locks in a shared file system (SFS) for a group of hosts that does not require any configuration to identify a server for managing locks for the SFS. Each host in the group carries out the steps of checking a predetermined storage location to determine whether there is a host ID written in the predetermined location. If there is no host ID written in the predetermined location, the first host to notice this condition writes its host ID in the predetermined location to identify itself as the server for managing locks. If there is a host ID written in the predetermined location, the host ID of the server for managing locks is maintained in local memory. When the host needs to perform IO operations on a file of the SFS, it communicates with the server for managing locks over the network using the host ID of the server for managing locks to obtain a lock to the file.

Abstract translation: 一种基于网络的方法，用于管理不需要任何配置的一组主机的共享文件系统（SFS）中的锁来标识用于管理SFS的锁的服务器。 组中的每个主机执行检查预定存储位置以确定是否存在在预定位置中写入的主机ID的步骤。 如果在预定位置没有写入主机ID，则注意到该状态的第一主机将其主机ID写入预定位置，以将其自身标识为用于管理锁的服务器。 如果在预定位置写入了主机ID，则用于管理锁定的服务器的主机ID被保存在本地存储器中。 当主机需要对SFS文件执行IO操作时，它将使用服务器的主机ID通过网络与服务器进行通信，以管理锁定，以获取锁定文件的锁定。

公开(公告)号：US20200065318A1

公开(公告)日：2020-02-27

申请号：US16671802

申请日：2019-11-01

Applicant: VMware, Inc.

Inventor： Austin CLEMENTS ,  Irfan AHMAD ,  Jinyuan LI ,  Murali VILAYANNUR

IPC: G06F16/27 ,  G06F16/31

Abstract: Decentralized deduplication operations in a computer system employ a hash index that is a variant of a B+ tree to support both efficient sequential updates as well as efficient random updates. Sequential update is selected when deduplication is infrequently performed, such as on the order of days, and random update is selected when deduplication is performed more frequently, such as on the order of seconds. More frequent deduplication may be beneficial during periods when large amounts of temporary duplicate data are created, and the system may not have enough storage space to accommodate the temporary spike in demand.

公开(公告)号：US20140236896A1

公开(公告)日：2014-08-21

申请号：US14263196

申请日：2014-04-28

Applicant: VMware, Inc.

Inventor： Christopher FROST ,  Jinyuan LI ,  Mayank RAWAT ,  Murali VILAYANNUR

IPC: G06F17/30

CPC classification number: G06F17/302 ,  G06F17/30194 ,  G06F17/30215 ,  G06F17/30575

Abstract: Multiple servers sharing a distributed file system are used to perform copies of regions of a source file in parallel from a source storage unit to corresponding temporary files at a destination storage unit. These temporary files are then merged or combined into a single file at the destination storage unit in a way that preserves the inode structure and attributes of the source file. A substantial speedup is obtained by copying regions of the file in parallel.

Abstract translation: 共享分布式文件系统的多个服务器用于从源存储单元并行地执行源文件区域的副本到目的地存储单元处的相应临时文件。 然后将这些临时文件以保存源文件的inode结构和属性的方式合并或组合到目标存储单元中的单个文件中。 通过并行复制文件的区域可以获得实质的加速。

公开(公告)号：US20140025820A1

公开(公告)日：2014-01-23

申请号：US14034171

申请日：2013-09-23

Applicant: VMware, Inc.

Inventor： Mayank RAWAT ,  Jinyuan LI ,  Murali VILAYANNUR ,  Daniel J. SCALES

IPC: H04L12/24

CPC classification number: H04L41/00 ,  G06F17/30171

Abstract: 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.

Abstract translation: 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。