公开(公告)号：US10275289B2

公开(公告)日：2019-04-30

申请号：US15431557

申请日：2017-02-13

Applicant: SAP SE

Inventor： Ivan Schreter

IPC: G06F17/30 ,  G06F9/50 ,  G06F16/27

Abstract: First logical cores supported on physical processor cores in a computing system can be designated for execution of message-passing workers of a plurality of message workers while at least second logical cores supported on the physical processor cores can be designated for execution of procedural code such that resources of a physical processor core supporting the first logical core and the second logical core are shared between a first logical core and a second logical core. A database object in a repository can be assigned to one message-passing worker, which can execute operations on the database object while procedurally coded operations are processed using the second logical core on one or more of the plurality of physical processor cores while the first logical core executes the message-passing worker.

公开(公告)号：US20190012357A1

公开(公告)日：2019-01-10

申请号：US16029459

申请日：2018-07-06

Applicant: SAP SE

Inventor： Ivan Schreter

IPC: G06F17/30 ,  G06F11/16

Abstract: A method for logging changes to data stored in a distributed data storage system can include responding to a request to change the data stored in the distributed data storage system by generating a log entry corresponding to the change. A replica of the data can be stored at each of a first computing node and a second computing node comprising the distributed data storage system. The log entry can be added to a first log stored at the first computing node and propagated to the second computing node to add the first log entry to a second log stored at the second computing node. A crash recovery can be performed at the first computing node and/or the second computing node based on the first log and/or the second log. Related systems and articles of manufacture, including computer program products, are also provided.

公开(公告)号：US10178186B2

公开(公告)日：2019-01-08

申请号：US15184168

申请日：2016-06-16

Applicant: SAP SE

Inventor： Ivan Schreter

IPC: H04L29/08 ,  H04L12/24 ,  H04L12/26 ,  G06F11/00 ,  H04L29/14

Abstract: Communication resumption information can be retained nodes of a cluster of nodes that form a distributed computing system. The communication resumption information can be exchanged between a node of the cluster and a peer node of the cluster after resumption of communication following a loss of communication between the node and the peer node. A determination of whether communication between the node and the peer node can be reestablished without losing messages can include comparing the communication resumption information received by the node from the peer node with the communication resumption information retained at the node. Communication between the node and the peer node can be resumed based when the determining indicates that communication between the node and the peer node can be reestablished without losing messages.

公开(公告)号：US10073872B2

公开(公告)日：2018-09-11

申请号：US14849041

申请日：2015-09-09

Applicant: SAP SE

Inventor： Ivan Schreter ,  Daniel Booss ,  Daniel Egenolf

IPC: G06F12/06 ,  G06F17/30

CPC classification number: G06F16/22 ,  G06F12/023 ,  G06F2212/1024 ,  G06F2212/1044

Abstract: A database memory manager determines a size class for each of a plurality of memory allocation requests. The memory manager then, based on the determined size classes, assigns which of a plurality of sub-allocators forming part of a plurality of memory pools should handle each memory allocation request. The sub-allocators assignments are based on predefined size ranges for each size class. The corresponding assigned sub-allocators then identify locations within the memory for each memory allocation request. The corresponding assigned sub-allocators next handle the memory allocation requests to allocate memory at the identified locations such that one of the sub-allocators utilizes both thread local storage and core-striped memory management.

公开(公告)号：US10019331B2

公开(公告)日：2018-07-10

申请号：US14973447

申请日：2015-12-17

Applicant: SAP SE

Inventor： Daniel Booss ,  Ivan Schreter ,  Ismail Oukid ,  Adrien Lespinasse

IPC: G06F11/00 ,  G06F11/20 ,  G06F3/06

CPC classification number: G06F11/2094 ,  G06F11/00 ,  G06F2201/805

Abstract: Disclosed herein are innovations in memory management and data recovery for systems that operate using storage class memory (SCM), such as non-volatile RAM (NVRAM). The disclosed innovations have particular application to production database systems, where reducing database downtime in the event of a system crash is highly desirable. Embodiments of the disclosed technology can address a variety of problems that exist during a system crash. For example, embodiments of the disclosed technology can be used to address the loss of the physical memory mapping and/or the loss of the CPU cache that typically occurs in the event of a system crash. Furthermore, embodiments of the disclosed technology can be used to prevent data inconsistency and/or memory leak problems that may arise in the event of a system crash.

公开(公告)号：US20180150392A1

公开(公告)日：2018-05-31

申请号：US15363516

申请日：2016-11-29

Applicant: SAP SE

Inventor： Daniel Booss ,  Ivan Schreter ,  Robert Kettler

IPC: G06F12/02

CPC classification number: G06F12/0292 ,  G06F2212/1016

Abstract: A system for memory allocation and deallocation with a multi-level memory map is provided. In some implementations, the system performs operations comprising allocating a memory map for addressing a plurality of memory locations in a heap, the memory map comprising a root node, one or more second-level nodes, and a plurality of third-level nodes. The plurality of third-level nodes can comprise third entries for pointing to the memory locations and/or the one or more second-level nodes can comprise a plurality of second entries corresponding to the plurality of third-level nodes. The operations can further include determining a location to store data within the heap and/or tracking the location by placing a pointer within a third-level node of the plurality of third-level nodes and incrementing a counter corresponding to the third-level node. Related systems, methods, and articles of manufacture are also described.

公开(公告)号：US20180150222A1

公开(公告)日：2018-05-31

申请号：US15428035

申请日：2017-02-08

Applicant: SAP SE

Inventor： Daniel Booss ,  Robert Kettler ,  Mehul Wagle ,  Harshada Khandekar ,  Ivan Schreter

IPC: G06F3/06 ,  G06F12/084

CPC classification number: G06F3/064 ,  G06F3/0604 ,  G06F3/0673 ,  G06F12/084 ,  G06F2212/1048 ,  G06F2212/604 ,  G06F2212/6042 ,  G06F2212/6046

Abstract: A system for allocating memory (e.g., heap) in multi-core processors is provided. In some implementations, the system performs operations comprising receiving, at a shared cache having a plurality of segments, a first data allocation including a plurality of data blocks, and allocating at least a first and second data block from the first allocation. First and second segments in the shared cache can each comprise a plurality of data slots (e.g., of equal length). Allocating the first and second data blocks can include storing the first data block in a data slot of the first segment and storing the second data block in a data slot of the second segment. The plurality of data slots which do not contain data may contain padding, and/or the data slots to which the first and second data blocks are allocated are not adjacent. Related systems, methods, and articles of manufacture are also described.

公开(公告)号：US20170293453A1

公开(公告)日：2017-10-12

申请号：US15632110

申请日：2017-06-23

Applicant: SAP SE

Inventor： Ivan Schreter ,  Dirk Thomsen ,  Colin Florendo ,  Blaine French

IPC: G06F3/06 ,  G06F17/30

CPC classification number: G06F3/0661 ,  G06F3/0608 ,  G06F3/0673 ,  G06F16/1744 ,  G06F16/22 ,  G06F16/221 ,  G06F16/2282 ,  G06F16/23 ,  G06F16/24554

Abstract: Data records of a data set can be stored in multiple main part fragments retained in on-disk storage. Each fragment can include a number of data records that is equal to or less than a defined maximum fragment size. Using a compression that is optimized for each fragment, each fragment can be compressed. After reading at least one of the fragments into main system memory from the on-disk storage, an operation can be performed on the fragment or fragments while the in the main system memory.

公开(公告)号：US20170185642A1

公开(公告)日：2017-06-29

申请号：US15457945

申请日：2017-03-13

Applicant: SAP SE

Inventor： Franz Faerber ,  Juchang Lee ,  Ivan Schreter

IPC: G06F17/30 ,  G06F3/06

CPC classification number: G06F16/2365 ,  G06F3/0604 ,  G06F3/0638 ,  G06F3/0644 ,  G06F3/0647 ,  G06F3/065 ,  G06F3/0652 ,  G06F3/0673 ,  G06F3/0683 ,  G06F16/162 ,  G06F16/1744 ,  G06F16/221 ,  G06F16/2308 ,  G06F16/2379 ,  G06F16/27 ,  G06F16/28

Abstract: A system and method of logless atomic data movement. An internal transaction is started within a multi-level storage architecture, the internal transaction to merge data from the first level storage structure to the second level storage structure. Committed data is read from a first level storage structure of the multi-level storage architecture as specified by the internal transaction. The committed data from the first level storage structure is inserted into a second level storage structure in a bulk insertion process, and the committed data is marked as being deleted from the first level storage. The internal transaction is then committed to the multi-level storage architecture when the committed data has been inserted into the second level storage structure.

公开(公告)号：US09690799B2

公开(公告)日：2017-06-27

申请号：US15015042

申请日：2016-02-03

Applicant: SAP SE

Inventor： Ivan Schreter ,  Dirk Thomsen ,  Colin Florendo ,  Blaine French

IPC: G06F17/30

CPC classification number: G06F3/0661 ,  G06F3/0608 ,  G06F3/0673 ,  G06F17/30153 ,  G06F17/30312 ,  G06F17/30315 ,  G06F17/30339 ,  G06F17/30345 ,  G06F17/30486

Abstract: Data records of a data set can be stored in multiple main part fragments retained in on-disk storage. Each fragment can include a number of data records that is equal to or less than a defined maximum fragment size. Using a compression that is optimized for each fragment, each fragment can be compressed. After reading at least one of the fragments into main system memory from the on-disk storage, an operation can be performed on the fragment or fragments while the in the main system memory.