Lazy Evaluation of Transactions in Database Systems
... set of ACID guarantees: if the user is told that the transaction has committed, this means that the effects of the transaction are guaranteed to be durably reflected in the state of the database, and any subsequent reads of data that this transaction wrote will include the updates made by the commit ...
... set of ACID guarantees: if the user is told that the transaction has committed, this means that the effects of the transaction are guaranteed to be durably reflected in the state of the database, and any subsequent reads of data that this transaction wrote will include the updates made by the commit ...
Lazy Evaluation of Transactions in Database Systems
... and increase resource utilization. In fact, deterministic database systems such as Calvin and VoltDB already implement exactly the machinery required for this type of lazy execution—but they replay the log eagerly rather than waiting for new read requests to prompt them along. This is because very l ...
... and increase resource utilization. In fact, deterministic database systems such as Calvin and VoltDB already implement exactly the machinery required for this type of lazy execution—but they replay the log eagerly rather than waiting for new read requests to prompt them along. This is because very l ...
11 Fast Distributed Transactions and Strongly Consistent
... Hadapt; S.-C. Weng, Yale University; K. Ren, Northwestern Polytechnical University, China; P. Shao, Microsoft; D. J. Abadi, Yale University. Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or ...
... Hadapt; S.-C. Weng, Yale University; K. Ren, Northwestern Polytechnical University, China; P. Shao, Microsoft; D. J. Abadi, Yale University. Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or ...
transaction
... • Two-phase locking (2PL) protocol: – No lock is to be taken after first unlock – Expanding Phase: We are gathering objects (and may start to use them). If an object is already locked we will wait and try again later. – Shrinking Phase: We releasing objects again. – Strict 2PL hold locks until commi ...
... • Two-phase locking (2PL) protocol: – No lock is to be taken after first unlock – Expanding Phase: We are gathering objects (and may start to use them). If an object is already locked we will wait and try again later. – Shrinking Phase: We releasing objects again. – Strict 2PL hold locks until commi ...
Distributed Systems - Distributed Transactions
... Pessimistic Approach: Locking - i.e. data is reserved exclusively for a particular transaction Other transactions must wait until release of locks to access same data ...
... Pessimistic Approach: Locking - i.e. data is reserved exclusively for a particular transaction Other transactions must wait until release of locks to access same data ...
Scaling HTM-Supported Database Transactions to Many Cores
... several limitations that, in general, prevent a one-to-one mapping of database transactions to HTM transactions. In this work, we devise several building blocks that can be used to exploit HTM in main-memory databases. We show that HTM allows for achieving nearly lock-free processing of database tra ...
... several limitations that, in general, prevent a one-to-one mapping of database transactions to HTM transactions. In this work, we devise several building blocks that can be used to exploit HTM in main-memory databases. We show that HTM allows for achieving nearly lock-free processing of database tra ...
HyperledgerFabric_LedgerV1_20170315
... Transaction simulation is a proposal only. Updates are not yet applied to database. Implications: • Transaction simulation does not support Read Your own Writes. GetState() always retrieves from state database. • At commit time, validation is required to ensure conditions at simulation time (ReadSet ...
... Transaction simulation is a proposal only. Updates are not yet applied to database. Implications: • Transaction simulation does not support Read Your own Writes. GetState() always retrieves from state database. • At commit time, validation is required to ensure conditions at simulation time (ReadSet ...