How Transaction Locks support Zero Overhead Distributed DML
April 3, 2019
Let us imagine a scenario that needs to prevent MVCC write skews…
Distributed Transactional Locks
April 3, 2019
As I explained in a previous blog post, sometimes MVCC is not sufficient and an operation needs to block out all other concurrent modifications. NuoDB is able to lock three types of lockable resources: tables, schemas, and sequences. A resource can either be locked in SHARED mode (which still allows record modification, but no metadata modification) or EXCLUSIVE which prevents any concurrent modification.
What I discovered using a simple challenge during interviews
September 24, 2018
Can coders code?
HackerRank 'The Power Sum' Solution
September 22, 2018
Short Problem Definition:
HackerRank 'Lily's Homework' Solution
September 21, 2018
Short Problem Definition:
HackerRank 'HackerRank Bear and Steady Gene' Solution
September 20, 2018