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公开(公告)号：US20220382744A1
公开(公告)日：2022-12-01
申请号：US17481775
申请日：2021-09-22
Applicant: Microsoft Technology Licensing, LLC
Inventor： Alexander Budovski , Eric Dean Lee , Ashmita Raju , Srikanth Sampath
IPC: G06F16/23 , G06F16/215
Abstract: Methods, systems and computer program products are provided for transaction log validation in a database transaction log service. A transaction log service may perform egress validation to confirm transaction logs match previously served transaction logs and are free of corruption. A transaction log service may determine whether a transaction log (e.g., in the form of a log block) was previously served based on transaction log (e.g., log block) identity indicating a position in a logical stream of transaction logs (e.g., log blocks). Egress validation may improve log service reliability by providing an added layer of defense against corruption of a transaction log payload.
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公开(公告)号：US11748369B2
公开(公告)日：2023-09-05
申请号：US17465298
申请日：2021-09-02
Applicant: Microsoft Technology Licensing, LLC
Inventor： Alejandro Hernandez Saenz , Cristian Diaconu , Krystyna Ewa Reisteter , Naveen Prakash , Sheetal Shrotri , Rogério Ramos , Alexander Budovski , Hanumantha Rao Kodavalla
IPC: G06F16/00 , G06F16/25 , G06F16/27 , G06F16/22 , G06F16/2455
CPC classification number: G06F16/256 , G06F16/278 , G06F16/2272 , G06F16/24557
Abstract: Distributed database systems including compute nodes and page servers are described herein that enable separating logical and physical storage of database files in a distributed database system. A distributed database system includes a page server and a compute node and is configured to store a logical database file that includes data and is associated with a file identifier. Each page server is configurable to store slices (i.e., subportions) of the logical database file. The compute node is coupled to the plurality of page servers and configured to store the logical database file responsive to a received command. In an aspect, such storage may comprise slicing the data comprising the logical database file into a set of slices with each being associated with a respective page server, maintaining an endpoint mapping for each slice of the first set of slices, and transmitting each slice to the associated for storage thereby.
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3.发明申请公开(公告)号：US20220382743A1
公开(公告)日：2022-12-01
申请号：US17481766
申请日：2021-09-22
Applicant: Microsoft Technology Licensing, LLC
Inventor： Alexander Budovski , Eric Dean Lee , Ashmita Raju , Srikanth Sampath
IPC: G06F16/23 , G06F16/172 , G06F16/215
Abstract: Methods, systems, and computer program products are provided for consolidating transaction log requests and transaction logs in a database transaction log service. A scalable log service may manage log requests and logs to reduce resource consumption, such as memory and I/O. Log requests may be managed by consolidating (e.g., organizing, merging and/or de-duplicating) the log requests. Transaction log requests may be mapped to read requests for transaction log storage devices in less than a one-to-one ratio. Transaction logs may be managed by using the consolidated log requests to consolidate (e.g., and prefetch) transaction logs from multiple cache and/or storage tiers to a log pool cache. Log requests may be served from the log pool cache.
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公开(公告)号：US11048664B2
公开(公告)日：2021-06-29
申请号：US16138103
申请日：2018-09-21
Applicant: Microsoft Technology Licensing, LLC
Inventor： Cristian Diaconu , Naveen Prakash , Alejandro Hernandez Saenz , Alexander Budovski
Abstract: The bifurcation of a log into a fixed-size log portion and a growable log portion. Log records are first written to the fixed-size log portion. At some point, the older log records within the fixed-size log portion are destaged to the growable log portion. Destaging may involve copying the log records from the fixed-size log portion and tacking the log record onto the end of the growable log portion. This destaging might occur one sub-portion (e.g., one virtual log file) at a time. The more recent log records are within the fixed-size log portion. Accordingly, new writes to the log occur to the fixed-size log portion. Furthermore, a large portion of the reads are of the more recent log records within the fixed-size log portion. Thus, optimizing performance within the fixed-size log portion results in significant improvement in the performance of the overall log.
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公开(公告)号：US12118014B2
公开(公告)日：2024-10-15
申请号：US18351258
申请日：2023-07-12
Applicant: Microsoft Technology Licensing, LLC
Inventor： Alejandro Hernandez Saenz , Cristian Diaconu , Krystyna Ewa Reisteter , Naveen Prakash , Sheetal Shrotri , Rogério Ramos , Alexander Budovski , Hanumantha Rao Kodavalla
IPC: G06F16/00 , G06F16/25 , G06F16/27 , G06F16/22 , G06F16/2455
CPC classification number: G06F16/256 , G06F16/278 , G06F16/2272 , G06F16/24557
Abstract: Distributed database systems including compute nodes and page servers are described herein that enable separating logical and physical storage of database files in a distributed database system. A distributed database system includes a page server and a compute node, and is configured to store a logical database file that includes data and is associated with a file identifier. Each page server is configurable to store slices (i.e., subportions) of the logical database file. The compute node is coupled to the plurality of page servers and configured to store the logical database file responsive to a received command. In an aspect, such storage may comprise slicing the data comprising the logical database file into a set of slices with each being associated with a respective page server, maintaining an endpoint mapping for each slice of the first set of slices, and transmitting each slice to the associated for storage thereby.
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Patent Agency Ranking
公开(公告)号：US11249866B1
公开(公告)日：2022-02-15
申请号：US17237707
申请日：2021-04-22
Applicant: Microsoft Technology Licensing, LLC
Inventor： Alexander Budovski , Cristian Diaconu , Sandeep Lingam , Alejandro Hernandez Saenz , Naveen Prakash , Krystyna Ewa Reisteter , Rogerio Ramos , Huanhui Hu , Peter Byrne
Abstract: Embodiments described herein detect data corruption in a distributed data set system. For example, a system comprises node(s) for processing queries with respect to a distributed data set comprising a plurality of storage segments. A write transaction resulting from a query with respect to a particular storage segment is logged in a log record that describes a modification to the storage segment. A log service provides the log record to a data server managing a portion of the distributed data set in which the storage segment is included, which performs the write transaction with respect to the storage segment. For redundancy purposes, the data server has replica(s) that manage respective replicas of the portion of the distributed data set managed thereby. For backup purposes, snapshots of the replica(s) are periodically generated. To determine a data corruption, a snapshot of one replica is cross-validated with a snapshot of another replica.
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公开(公告)号：US10802715B2
公开(公告)日：2020-10-13
申请号：US16138139
申请日：2018-09-21
Applicant: Microsoft Technology Licensing, LLC
Inventor： Cristian Diaconu , Alejandro Hernandez Saenz , Naveen Prakash , Alexander Budovski
Abstract: The mounting a drive to two or more computing systems. For instance, the drive may be mounted to a first computing system so as to be writable (and potentially readable) by the first computing system. But also, the drive is also mounted to one or more other computing systems so as to be only readable by those one or more computing systems. This allows for multiple computing systems to have access to the drive without risk that the data thereon will become corrupt. In one embodiment, the only user data stored on that drive is a single file of fixed size. Thus, even when user data is written into the fixed-size file, the management data stored (that keeps track of the files) on the drive does not change.
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公开(公告)号：US11720550B2
公开(公告)日：2023-08-08
申请号：US17481775
申请日：2021-09-22
Applicant: Microsoft Technology Licensing, LLC
Inventor： Alexander Budovski , Eric Dean Lee , Ashmita Raju , Srikanth Sampath
IPC: G06F16/23 , G06F16/215
CPC classification number: G06F16/2379 , G06F16/215
Abstract: Methods, systems and computer program products are provided for transaction log validation in a database transaction log service. A transaction log service may perform egress validation to confirm transaction logs match previously served transaction logs and are free of corruption. A transaction log service may determine whether a transaction log (e.g., in the form of a log block) was previously served based on transaction log (e.g., log block) identity indicating a position in a logical stream of transaction logs (e.g., log blocks). Egress validation may improve log service reliability by providing an added layer of defense against corruption of a transaction log payload.
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9.发明授权公开(公告)号：US11709824B2
公开(公告)日：2023-07-25
申请号：US17481766
申请日：2021-09-22
Applicant: Microsoft Technology Licensing, LLC
Inventor： Alexander Budovski , Eric Dean Lee , Ashmita Raju , Srikanth Sampath
IPC: G06F16/21 , G06F16/23 , G06F16/17 , G06F16/215 , G06F16/172
CPC classification number: G06F16/2379 , G06F16/172 , G06F16/215
Abstract: Methods, systems, and computer program products are provided for consolidating transaction log requests and transaction logs in a database transaction log service. A scalable log service may manage log requests and logs to reduce resource consumption, such as memory and I/O. Log requests may be managed by consolidating (e.g., organizing, merging and/or de-duplicating) the log requests. Transaction log requests may be mapped to read requests for transaction log storage devices in less than a one-to-one ratio. Transaction logs may be managed by using the consolidated log requests to consolidate (e.g., and prefetch) transaction logs from multiple cache and/or storage tiers to a log pool cache. Log requests may be served from the log pool cache.
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公开(公告)号：US10949412B2
公开(公告)日：2021-03-16
申请号：US16138057
申请日：2018-09-21
Applicant: Microsoft Technology Licensing, LLC
Inventor： Cristian Diaconu , Naveen Prakash , Alexander Budovski , Alejandro Hernandez Saenz
Abstract: The use of log marking (otherwise known as “coloring”) of sub-portions of a log that records actions (e.g., data operations) performed by a computing system. The log is composed of multiple sub-portions, such as virtual log files, which are successively added to the log as the log grows. For instance, the sub-portions may be virtual log files of the log. The principles described herein change the use of log marking depending on which sub-portion of the log is being marked. If the computing system fails, and recovery is needed, the recovery process can thus deterministically identify where the last written log record is.
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