I have vague memories (but haven't tested recently) that if unlike page datasets were used then the smallest size would dictate the usage for ALL datasets.
Jerry Whitteridge Lead Systems Engineer Safeway Inc. 925 738 9443 Corporate Tieline - 89443 If you feel in control you just aren't going fast enough. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Thomas Conley Sent: Monday, July 06, 2015 5:38 PM To: [email protected] Subject: Re: PAGE DS 30% same-size On 7/6/2015 7:59 PM, R Hey wrote: > Does this 30% apply to every local page DS, or total space of all DS? > > Any overhead of using a mix of small & very big sizes? > > TIA, > Rez > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > The 30% applies to each individual page dataset. I don't recommend mixing and matching large and small page datasets. Harder to manage, and easier for one page dataset to go into the red zone. As we saw in the D ASM example earlier, ASM doesn't distribute pages based on page DS size, and the smaller page datasets were over 30% while the larger page datasets showed single-digit usage. That's why I recommend the same size page datasets. I typically use 3338 CYLINDERS on a 3390-3. Regards, Tom Conley ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN "Email Firewall" made the following annotations. ------------------------------------------------------------------------------ Warning: All e-mail sent to this address will be received by the corporate e-mail system, and is subject to archival and review by someone other than the recipient. This e-mail may contain proprietary information and is intended only for the use of the intended recipient(s). If the reader of this message is not the intended recipient(s), you are notified that you have received this message in error and that any review, dissemination, distribution or copying of this message is strictly prohibited. If you have received this message in error, please notify the sender immediately.. ============================================================================== ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
