Draft Document for Review February 7, 2020 3:15 pm 8464ch03_business requirements.fm This large amount of data must all be stored and protected, and this data must be quickly and  readily accessible. With more primary workloads ending on tape, response time requirements  have become more demanding. Due to cost pressures, businesses are enforcing a Tier-Technology environment. Older or not  often-used data must be on less expensive storage, whereas highly accessed data must stay  on primary storage, which enables fast access. Applications such as Content Manager,  Hierarchical Storage Manager (HSM), or output archiver are rule-based, and are able to shift  data from one storage tier to another, which can include tape. If you are considering using  such applications, the tier concept needs to be planned carefully.  With advanced technology, there are challenges, such as having many new options to meet  many client needs. For example, the TS7700 has many options regarding where data can be  located, and where and how it must be replicated. Investing some time in choosing the correct  set of rules helps you meet your requirements.  Also, the TS7700 itself decides which workloads must be prioritized. Depending on the  cluster availability in the grid, actual workload, or other storage conditions, the copy queues  might be delayed. In addition, the TS7700 automates many decisions to provide the most  value. This dynamic behavior can sometimes result in unexpected behaviors or delays.  Understanding how your environment behaves, and where your data is stored at any point in  time, is key to having a successful implementation, including the following considerations:  A reaction might be to configure your environment to define synchronous and immediate  copies to all locations, or to set all overrides. This likely increases the configuration capacity  and bandwidth needs, which can introduce negative results. Planning and working with your  IBM account team so that the optimal settings can be configured helps eliminate any  unexpected behaviors. Other features, such as scratch allocation assistance (SAA) and device allocation assistance  (DAA), might affect your methodology of drive allocation, whereas some customizing  parameters must always be used if you are a Geographically Dispersed Parallel Sysplex  (GDPS) user. So, it is essential for you to understand these mechanisms to choose the best configuration  and customize your environment. You need to understand the interactions and dependencies  to plan for a successful implementation.  Important:  There is no “one solution that fits all requirements.” Do not introduce complexity  when it is not required. Allow IBM to help you look at your data profile and requirements so  that the best solution can be implemented for you.  GLYPH<SM590000> During a mount, a remote Tape Volume Cache (TVC) was chosen over a local TVC. GLYPH<SM590000> Copies are intentionally delayed due to configuration parameters, yet they were expected  to complete sooner. GLYPH<SM590000> Copy Export sets do not include all of the expected content because the export was  initiated from a cluster that was not configured to receive a replica of all the content. 3.1.3 Challenges of technology progress Chapter 3. IBM TS7700 usage considerations  111