2 * [ (SSCH Rate) * (Average I/O Service Time) ] = # of Proposed Aliases
Example -- assumptions are 2000 SSCH for the LCU with an average I/O
service time of 5 milliseconds.
2 * [ (2000) * (.005) ] = 2 * 10 = 20 Aliases for the LCU
Note ... Make this calculation at the LCU level as the alias are defined
as device numbers on an LCU.
SUBSCRIBE IBM-MAIN Pete Eggebeen wrote:
Hello,
We are installing a new DASD array with 33 TB of capacity with
approximately 1/3 of the capacity being setup as 3390-3's, 1/3 as 3390-9's
and the last 1/3 as 3390-27's. I am wondering if anyone has any experience
or documentation that would suggest how many Hyper PAVs per LCU we should
define. The LCUs will contain an even mix (from a capacity perspective) of
the 3390-3's, 3390-9's and 3390-27's.
Pete Eggebeen
Systems Programmer Specialist
Enterprise Storage Management
Metavante Corporation
Phone: (414) 577-9521
Fax: (414) 577-8998
e-mail: pete.eggeb...@metavante.com
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