656 DS8800 Performance Monitoring and Tuning
In both Figure C-3 on page 654 and Figure C-4 on page 655, we distributed the disks of a
certain DA pair, DA pair 5, between an even extent pool and an odd extent pool always.
Because we have two DAs in a pair, we want to put load on both DAs. If we give all ranks of
DA pair 5 to an even extent pool and all ranks of DA pair 7 to an odd extent pool, we share the
load across both processor complexes, but we do not use all 4 DAs of the two DA pairs, 5 and
7.
Performance tools
We described the use of the various performance tools, such as Tivoli Storage Productivity
Center (TPC) for Disk, for performance monitoring and problem analysis in earlier chapters.
Tivoli Storage Productivity Center also can store ...