Lizette Koehler wrote: > Mark, > > I agree with your statement. My concern is that some want to set up the ACS > code to be generic, > > IF (&DSN=PROD.**) Then DATACLAS=ENCRYPT. > > I want to update the JCL on just the first file to include the > DATACLAS=ENCRYPT. > > So I am trying to figure it out the price of doing all the files individually > on a stacked tape. Would iit slow down the process, and if it does, how can > I calculate it? I know there is a some XX seconds it takes to do the > encryption. If I have 35 files being encrypted on the tape, then I expect > the answer should be 35 times XX seconds in delay of the job finishing. > > I am also told that if I use OPENTECH or COPYCAT to copy these stacked > volumes to an offsite tape, then I do not need to encrypt the offsite tape as > the files being copied are encrypted to start with. So the offsite tape > becomes encrypted by default. Or did I get that wrong? > > Lizette > > > >
The delay when using encrypted tapes is the time spent communicating with the EKM when the tape is first mounted. There should be no additional overhead encrypting the entire tape once the initial handshaking is performed. During the tape copy process if the output tape is written in EEFMT2 then the data is encrypted, if not no. The tape drive returns to the copy program unencrypted data. Mark Jacobs >> Lizette Koehler wrote: >> >>> When you run tape Encryption on a stacked tape do you encrypt all files >>> that are stacked on a tape or just one file on the stacked tape? >>> >>> For example, I have a batch backup job that places 35 dumped volumes on one >>> tape. I have looked at the doc and it seems I could place the encryption >>> on the first file only and the whole tape will be encrypted. >>> >>> Or does it not take any more time or resources to have encryption happen >>> for each volume on the stacked tape? >>> >>> I have been asked to place encrption on each file via Dataclas/ACS routines >>> on a stacked tape. I am just trying to get a handle of what the >>> performance trade offs are. >>> >>> > > >>> >>> >> AFAIK, once a tape has been written in EEFMT2 format the entire tape is >> encrypted, In other words it isn't on a file by file basis. >> >> -- >> >> > > ---------------------------------------------------------------------- > 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 > > -- Mark Jacobs Time Customer Service Tampa, FL ---- Delenn, I have been working up a good mad all day and I am NOT about to let you ruin it by agreeing with me! Captain John Sheridan - Babylon 5 ---------------------------------------------------------------------- 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
