The Mainframe Era In 1970 I joined a company, Databank Systems Ltd, that operated a national network of 6 computer centres, each containing a S360/40. In total this was less than 1/10,000th of the power of my current laptop, at a cost several thousand times...
Last week we ended with Db2 Performance of zHyperLink Read. Now let’s look at the CPU cost of zHyperLink read. As explained last week, I/O operation is now synchronous to CPU with zHyperLink and SQL processing spins while waiting for the I/O to complete. At the same...
As the size of database and the volume of transactions increase, many of Db2 transactions tend to spend significant amount of wait time in database read and log write I/Os. zHyperLink is introduced to help reduce b2 transaction latency. zHyperLink is a new short...
Not long ago, a Db2 for z/OS administrator contacted me with a request. His team had made some changes to the buffer pool configuration in their production Db2 environment (the overall size of the buffer pool configuration was increased to reduce read I/O activity,...
In a growing economy, increases in expected business workloads are making their impacts felt in today's busiest data centers, through increased online transactions, web requests, mobile requests, batch jobs, ad hoc queries, data warehousing analysis, and more....
System upgrades are a fact of life. If you're running a mainframe system, you're doing it for a good reason—and that’s almost certainly because you need the performance, capacity, throughput and security. Not only that, you're more than likely experiencing growing...
Almost 2 years ago, it was reported that over 10,000 MongoDB databases had been deleted by ransomware groups - and much of that was done in a week's time. Let that sink in for a minute - 10,000 databases in a week - it's mind boggling. Makes you think twice about your...
Introduction The z/OS Parallel Sysplex® technology provides a highly reliable, redundant, and robust environment by clustering together multiple z/OS systems with one or more coupling facilities to achieve near-continuous availability. However, simply running your...
Or: We need to talk about mainframe hacking There’s an elephant in the room says Mark Wilson. It’s mainframe-sized, at serious risk of being hacked, and its name is Z. “The only thing we have to fear is fear itself.” That was US president Franklin D. Roosevelt at his...
I love hearing about Blockchain; if you are involved in Fintech, then surely by now you have heard a lot about it, and that it holds a tremendous amount of promise for Internet business. Fundamentally, it guarantees the validity of a transaction. Blockchain is a...
