To me the following is a no brainer: If there are going to be attributes contained in the data class structure in the SCDS which can be dynamically queried after the initial allocation of a data set, then there should be some means: 1. to alter a data set's data class name such as: ALTER datasetname DATACLAS(newdataclass). 2. for utilities such as dss, they should be able to re-drive the DC ACS routine when restoring(or recalling) data sets such as: COPY ... NULLDATACLAS | DATACLAS(dataclassname)
> -----Original Message----- > > Don, > > Yes I discovered this too and it is partially true: you cannot change > the dataclass of a dataset, but some attributes of the dataclass will > be > used at open-time, so changing these attributes will be noted on > subsequent opens of datasets with that dataclass. > > We ran into problems with DB2 and received the following error: > IGD104I DB2TA.DSNDBC.DRCA02.XSGMNT2.J0001.A001 RETAINED, > DDNAME=A002289C > IKJ56231I DATA SET DB2TA.DSNDBC.DRCA02.XSGMNT2.J0001.A001 NOT > ALLOCATED, > SYSTEM OR INSTALLATION ERROR+ > IKJ56231I DYNAMIC ALLOCATION REASON CODE IS X'000004FC' > > IEF020I DB2TDBM1 DB2TDBM1 TCT I/O TABLE SIZE EXCEEDS THE 16MB MAXIMUM. > > > 04FC (1276) Meaning: The request being processed would cause the > TCT > I/O table to exceed the maximum allowable size. > Application Programmer Action: If the job that received the message has > JCL DD statements that specify a high volume count, or the job that > received the message uses dynamic allocation to allocate data sets and > specifies a high volume count, reduce the volume count and rerun the > job. If the volume count is derived from the data class, use a data > class which has a lower volume count or contact the Storage > Administrator. > Storage Administrator Action: Reduce the volume count or dynamic volume > count specified in the DATACLAS. > > Each time at open of a dataset the dynamic volume count value of the > dataset's dataclass is used to create controlblocks to be able to > extend > the dataset. Chaning the dataclass's attributes will change the > controlblocks on subsequent opens of the datasets. > > Here it is explained: > http://www-01.ibm.com/support/docview.wss?uid=isg3T1000065 > > It is not so much undocumented, as well as rather hidden in docs partly > related to SMS. > > This is why I would like to be able to change the dataclass value of a > dataset. If a large group of datasets have a specific dataclass and you > want to change some dynamic attributes of the dataclass and it appear > that they are unfit for some datasets, changing these dataset's > dataclass to a more suitable class can solve problems. > > Kees. > ******************************************************** > 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: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
