In impacting the system, there is no difference in whatever storage a user consumes largely. It can/will result in heavy page-outs, which are not necessarily bad if the pages are old, and consequently heave page-ins which will impact your system performance. Hiperspaces can be much larger than dataspaces, but you can have many of both. The structure of hiper- and dataspaces are quite different and the techniques to use them are evenly different. The same is true for 64-bit storage.
Kees. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Lindy Mayfield Sent: Tuesday, November 24, 2015 2:51 PM To: [email protected] Subject: Re: z/OS and hiperspaces I was under the impression that hiperspace is a bit better choice over dataspace for larger work files. But actually I'm trying to understand how both types of them work, and how users could potentially impact a system if they can allocate large amounts of hiperspace or dataspace memory. Lindy -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Vernooij, CP (ITOPT1) - KLM Sent: Tuesday, November 24, 2015 12:37 PM To: [email protected] Subject: Re: z/OS and hiperspaces Hi, I suggest you also consider dataspaces. With regard to what users can do with them and what impact they have on the system, they are similar: they use virtual (and therefor central storage). E.g. IEFUSI has only one value to limit the a user's use of hiper- and dataspaces. A special user is DFSORT, which can use huge amounts of it, but takes well care not to the impact the system to much. Kees. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ******************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ******************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
