Background: I inherited a legacy version of the hadoop stack (0.20.2) running hbase v. 0.20.3 on top. As this is quite an old and unsupported version, we obviously wanted to upgrade. The main problem with this is that this system is already in use in production, thus increasing the upgrade risks. In addition, the instance [...]
As promised, here is short example of the Daemon in operation.
The problem that this program was designed to solve is a rapidly changing MySQL table in use by a high-traffic website. For instance, stock quotes on the front page of a bank’s or investments firm’s site. The data is constantly updated by a service on the backend, and is referred to by some ajax widget [...]
Setting up a MySQL fail over Master-Master replication system is something one can find many guides for. However, monitoring and recovering from a failure of the system is not as well documented, according to a quick Google search. The top items from that search were: Something called: MYSQL master-master replication monitor shell script that mainly [...]