Huawei Technologies Co., Limited

Hillel Avni

Israel Gold

Eliezer Levy

Antonios Iliopoulos

Zuguang Wu

Aharon Avitzur

Avi Mendelson

The invention relates to a data processing system and a date processing method. The data processing system is configured to perform a hardware transactional memory (HTM) transaction. The data processing system comprises a byte-addressable nonvolatile memory for persistently storing data and a processor being configured to execute an atomic HTM write operation in connection with committing the HTM transaction by writing an indicator to the nonvolatile memory indicating the successful commit of the HTM transaction.

Coherence protocol for hardware transactional memory in shared memory using non volatile memory with log and no lock

A system for managing abort events of Hardware Transactional Memory (HTM) transactions to an in-memory database, comprising a processor adapted to control a plurality of abort events of a plurality of database transactions held concurrently to a shared in-memory database and a method for managing abort events comprising analyzing a metadata record associated with each potential abort event, where the metadata record comprises a row ID value and a row version value of a certain one of a plurality of rows of a database that is concurrently accessed by an aborting HTM transaction and another HTM transaction, comparing the row ID value and the row version value to a local ID value and a local version value of the aborting HTM transaction and determining a contention condition between the aborting HTM transaction and the other HTM transaction.

Updating metadata in hardware transactional memory user aborts

There is provided a database management system, comprising: a multicore processor, a shared memory, a partitioned memory, and a database engine adapted to execute at least one transaction worker thread managing transaction states and database indexes in the shared memory using a cache coherency mechanism, and execute at least one partition manager thread for handling database access actions submitted by the at least one transaction worker thread to access a database in the partitioned memory, the cache coherency mechanism being disabled in the partitioned memory; wherein the at least one transaction worker thread and the at least one partition manager thread are executed simultaneously on the multicore processor.

Systems and methods for managing databases

In one embodiment, a system for managing a skiplist includes processors arranged for parallel execution of threads, a shared memory storing a skiplist arranged as an ordered set of nodes, and at least one transaction execution thread executed by at least one of the plurality of processors. The at least one transaction execution thread is to execute a range-query operation to identify at least one node of the ordered set of nodes between a first lower key value and a second upper key value, the key-range operation executed by an execution phase and a commit phase, wherein during the execution phase the at least one transaction execution thread traverses nodes of the skiplist in a lock-free state, wherein during the commit phase the at least one transaction execution thread executes a commit protocol that guarantees transaction consistency of the skiplist structure and validates consistency of the range-query operation.

Growing community of inventors

Munich, Germany

Hillel Avni