As a starting point, you should understand the
complexity of queries in the workload, the amount of data, and the
number of concurrent users. Oracle and its partners continue to
update these configurations as hardware platforms are improved. For
more information, search on ???Optimized Warehouse??? on Oracle??™s
main web site.
Disk Deployment Strategies
Disks are often directly attached to systems??”more expensive systems offer faster
disk controllers and I/O. As network bandwidth has improved, Network Attached
Storage (NAS) and Storage Area Networks (SAN) have appeared as cost-effective
alternatives. Disks are also configured in a variety of ways for redundancy, eliminating
the possibility of single points of disk failure resulting in loss of access to data.
Disk is commonly deployed in arrays, the industry standard being RAID (Redundant
Array of Inexpensive/Independent Disks). Youcan use RAID as a part of any of
the configurations we??™ve discussed to provide higher performance and reliability.
RAID disk arrays were introduced in this book in Chapter 7 and discussed in the
context of their use in high-availability scenarios in Chapter 11.
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