Draft Document for Review February 7, 2020 4:43 pm 8464ch12_Performance.fm Figure 12-3 shows the read hit performance numbers. 0 500 1000 1500 2000 2500 3000 TS7760Tcp1 VEC-T/CSA/XSA R 4.0 (26-DRs/8x8Gb/zEC12) TS7760Tcp0 VEC-T/CSA/XSA R 4.0 (26-DRs/8x8Gb/zEC12) TS7760Tcp1 VEC-T/CSA/XSA R 4.0 (10-DRs/8x8Gb/zEC12) TS7760 VEC/CSA/XSA R 4.0 (10-DRs/8x8Gb/zEC12) TS7720Tcp1 VEB-T/CS9/XS9 R 3.2 (26-DRs/8x8Gb/z10) TS7720Tcp1 VEB-T/CS9/XS9 R 3.2 (10-DRs/8x8Gb/z10) TS7740 V07/CC9/CX9 R 3.2 (3DRs/8x8Gb/z10) TS7720 VEB/CS9/XS9 R 3.2 (10-DRs/8x8Gb/z10) TS7740 V07/CC9/CX9 R 3.1 (3DRs/8x8Gb/z10) TS7720 VEB/CS9*/XS9 R 3.1 (42-DRs/8x8Gb/z10) TS7720 VEB/CS9*/XS9 R 3.1 (26-DRs/8x8Gb/z10) TS7720 VEB/CS9*/XS9 R 3.1 (10-DRs/8x8Gb/z10) TS7720 VEB/CS9/XS9 R 3.1 (10-DRs/8x8Gb/z10) TS7740 V07/CC9/CX9 R 3.1 (3DRs/4x1x8Gb/z10) TS7740 V07/CC9/CX9 R 3.0 (3DRs/4x4Gb/z10) TS7720 VEB/CS9/XS9 R 3.0 (10-DRs/4x4Gb/z10) TS7720 VEB/CS8/XS7 R 2.1 (7DRs/4x4Gb/z10) TS7740 V07/CC8/CX7 R 2.1 (4DRs/4x4Gb/z10) TS7720 VEB/CS8/XS7 R 2.0 (19DRs/4x4Gb/z10) TS7720 VEB/CS8/XS7 R 2.0 (7DRs/4x4Gb/z10) TS7740 V07/CC8/CX7 R 2.0 (4DRs/4x4Gb/z10) TS7720 VEA/CS8/XS7 R 1.7 (19DRs/4x4Gb/z10) TS7720 VEA/CS8/XS7 R 1.7 (7DRs/4x4Gb/z10) TS7740 V06/CC8/CX7 R 1.7 (4DRs/4x4Gb/z10) TS7720 VEA/CS7/XS7 R 1.6 (7DRs/4x4Gb/z10) TS7740 V06/CC7/CX7 R 1.6 (4DRs/4x4Gb/z10) TS7720 VEA/CS7/XS7 R 1.5 (7DRs/4x4Gb/z10) TS7740 V06/CC6/CX6 R 1.5 (4DRs/4x2Gb/z990) TS7740 V06/CC6/CX6 R 1.5 (4DRs/4x2Gb/z900) TS7740 V06/CC6/CX6 R 1.3 (4DRs/4x2Gb/z900) B20 VTS (8xFICON) W/FPA B10 VTS (4xFICON) Host MB/s (Uncompressed) 3 T A N D A L O N E 6 4 3 4 3 2 E A D ( I T 0 E R F O R M A N C E ( I S T O R Y Read Hit Figure 12-3 VTS and TS7700 maximum host read hit throughput The numbers that are shown in Figure 12-3 were obtained with 128 concurrent jobs in all  runs, each job uses 32 KiB blocks, and QSAM BUFNO = 20. Before R 3.2, the volume size  was 800 MiB (300 MiB volumes @ 2.66:1 compression). Since R 3.2, the volume size is 2659  MiB (1000 MiB volumes @ 2.66:1 compression). From a performance aspect, the architecture offers the following important characteristics: GLYPH<SM590000> With the selection of IBM Db2fi as the central repository in the TS7700, the TS7700  provides a standard Structured Query Language (SQL) interface to the data, and all data  is stored and managed in one place. Db2 also allows for more control over performance. GLYPH<SM590000> The cluster design with virtualization node (vNode) and hierarchical data storage  management node (hnode) provides increased configuration flexibility over the monolithic  design. GLYPH<SM590000> The use of Transmission Control Protocol/Internet Protocol (TCP/IP) instead of FICON for  site-to-site communication eliminates the requirement to use channel extenders. Chapter 12. Performance considerations  705