公开(公告)号：US20250156104A1

公开(公告)日：2025-05-15

申请号：US18594982

申请日：2024-03-04

Applicant: Microsoft Technology Licensing, LLC

Inventor： Junxiang WANG ,  Vadim MAKHERVAKS ,  Yingrui TONG ,  Sijia HUANG ,  Yuxing ZHOU ,  Zhihao LIU ,  Xigeng SUN ,  Bangzhu ZHU

IPC: G06F3/06

Abstract: Caching write input/output (I/O) operations in a replica-based storage system. A write I/O operation is received from a consumer, and a corresponding replica list is identified. A first replica set is selected from the replica list for caching the I/O operation, and a first log corresponding to the I/O operation is added to a primary ring buffer of the first replica set. When the first log cannot be replicated to a secondary ring buffer of the first replica set, a second replica set is selected from the replica list for caching the I/O operation. A second log corresponding to the I/O operation is added to a primary ring buffer of the second replica set. Once the second log has been replicated to a secondary ring buffer of the second replica set, the I/O operation is acknowledged to the consumer, and the second log is de-staged to a backing store.

公开(公告)号：US20250156322A1

公开(公告)日：2025-05-15

申请号：US18587258

申请日：2024-02-26

Applicant: Microsoft Technology Licensing, LLC

Inventor： Yingrui TONG ,  Sijia HUANG ,  Vadim MAKHERVAKS ,  Yuxing ZHOU ,  Junxiang WANG ,  Zhihao LIU ,  Bangzhu ZHU ,  Xigeng SUN

IPC: G06F12/0802 ,  G06F9/455

Abstract: A computer system and method are disclosed for replicating logs in a distributed environment. The method includes identifying a write input/output (I/O) operation and identifying a log to be replicated based on the write I/O operation. The log is then persisted to local non-volatile memory in the computer system. Subsequently, the log is replicated to multiple remote hosts, where each remote host of the plurality of remote hosts stores the log in its corresponding local non-volatile memory without de-staging the log to a backing store. The write I/O operation is committed once the log is replicated to at least a subset of the remote hosts that forms a quorum. Finally, the log is de-staged to the backing store after the write I/O operation is successfully committed.

公开(公告)号：US20250156333A1

公开(公告)日：2025-05-15

申请号：US18595061

申请日：2024-03-04

Applicant: Microsoft Technology Licensing, LLC

Inventor： Junxiang WANG ,  Xigeng SUN ,  Vadim MAKHERVAKS ,  Sijia HUANG ,  Yingrui TONG ,  Yuxing ZHOU ,  Zhihao LIU ,  Bangzhu ZHU

IPC: G06F12/0888

Abstract: Methods and systems for transitioning write input/output (I/O) requests from a write-caching mode to a pass-through mode. The method includes determining when a condition has been met for transitioning the write I/O requests and de-staging one or more logs from a write cache to a backing store, where each log corresponds to a pending write I/O operation by a consumer. The method further includes determining when no log remains in the write cache for de-staging to the backing store and initiating the pass-through mode by routing new write I/O requests directly to the backing store instead of the write cache.