公开(公告)号：US20210318960A1

公开(公告)日：2021-10-14

申请号：US16846485

申请日：2020-04-13

申请人： EMC IP Holding Company LLC

发明人： Sanjib Mallick ,  Vincent H. Westin ,  Gabriel Benhanokh ,  Ian Wigmore ,  Arieh Don

IPC分类号： G06F12/0817 ,  G06F12/0808 ,  G06F12/0882 ,  G06F12/1081

摘要： A first host device establishes connectivity to a logical storage device of a storage system. The first host device obtains from the storage system host connectivity information identifying at least a second host device that has also established connectivity to the logical storage device, caches one or more extents of the logical storage device in a memory of the first host device, and maintains local cache metadata in the first host device regarding the one or more extents of the logical storage device cached in the memory of the first host device. In conjunction with processing of a write operation of the first host device involving at least one of the one or more cached extents of the logical storage device, the first host device invalidates corresponding entries in the local cache metadata of the first host device and in local cache metadata maintained in the second host device.

公开(公告)号：US11336509B2

公开(公告)日：2022-05-17

申请号：US16176752

申请日：2018-10-31

申请人： EMC IP Holding Company LLC

发明人： Erik P. Smith ,  Scott Rowlands ,  Vincent H. Westin ,  Kevin Martin ,  Arieh Don

IPC分类号： G06F11/00 ,  H04L41/0677 ,  H04L41/0659 ,  H04L41/22 ,  H04L67/1097 ,  H04L49/356 ,  H04L49/354 ,  H04L49/25

摘要： Single points of failure (SPoFs) may be determined for I/O connectivity on a storage network. I/O path information may be determined for a storage device, for example, as a result of a host system logging into the storage network, and may be updated in response to events on the storage network. From this determined I/O path information, one or more SPoFs between a storage device and an application layer may be determined if, for the I/O path information collectively, it is determined that there is only one of any of the path components between the storage device and the application layer. The I/O path information may be displayed in a manner that facilitates a user identifying that there is an SPoF on an I/O path between a storage device and an application layer of a host system. Based on the determination of an SPoF, an alert may be issued.

公开(公告)号：US11366756B2

公开(公告)日：2022-06-21

申请号：US16846485

申请日：2020-04-13

申请人： EMC IP Holding Company LLC

发明人： Sanjib Mallick ,  Vincent H. Westin ,  Gabriel Benhanokh ,  Ian Wigmore ,  Arieh Don

IPC分类号： G06F12/0817 ,  G06F12/0808 ,  G06F12/1081 ,  G06F12/0882

摘要： A first host device establishes connectivity to a logical storage device of a storage system. The first host device obtains from the storage system host connectivity information identifying at least a second host device that has also established connectivity to the logical storage device, caches one or more extents of the logical storage device in a memory of the first host device, and maintains local cache metadata in the first host device regarding the one or more extents of the logical storage device cached in the memory of the first host device. In conjunction with processing of a write operation of the first host device involving at least one of the one or more cached extents of the logical storage device, the first host device invalidates corresponding entries in the local cache metadata of the first host device and in local cache metadata maintained in the second host device.