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Chapter 11. Suggestions > IBM N-Series deduplication - Pg. 278

Different deduplication technologies use different approaches to guarantee data integrity. However, all technologies have matured their availability characteristics to the point that availability is no longer a salient decision criteria for choosing deduplication solutions. 11.5 ITSM deduplication Another way of deciding between ProtecTIER and IBM Tivoli Storage Manager deduplication is to evaluate IBM Tivoli Storage Manager server system resources (CPU, memory, I/O bandwidth, database backup size, and potential available window for deduplication). If sufficient server resources can be made available for daily deduplication and additional reclamation processing, IBM Tivoli Storage Manager deduplication is a great option. ITSM deduplication is ideal for smaller environments and for customers who do not want to invest in a separate deduplication appliance. IBM Tivoli Storage Manager can also be used in larger environments if appropriate CPU, memory, and I/O resources are available on the server. Like most deduplication technologies, ITSM deduplication performance rates vary greatly based on data, system resources applied, and other factors. In our labs, we have measured server deduplication rates of 300 to 400 MBps with large files (greater than 1 MB) on 8 processor AIX systems with 32 GB of memory. On 4 processor systems we've seen rates around 150 to 200 MBps on large files. Rates with mostly small files or running on single processor systems were much lower. If your environment has mostly large files, our benchmarking would suggest that 100 to 200 MBps deduplication rates are possible with IBM Tivoli Storage Manager using 4 or 8 processors.