Disk zIIP usage.

Products

• Disk Backup and Restore - MVS
• DISK BACKUP AND RESTORE- ADD-ON OPTIO
• DISK BACKUP AND RESTORE

Issue/Introduction

Does CA Disk exploit zIIP ? 

Resolution

Currently DISK does not exploit zIIP processors. Disk is not a good candidate for using zIIP since using SRB mode is required. 

SRB mode means no SVC's can be issued and no I/O which is what Disk mainly does. Our data compression might be the only place we could use zIIP. 

Additional Information

If you are using a DATACOM Files DB, then Datacom/AD can use zIIP processing using startup options SMPTASK and ZIIP_USER_LIMIT. You must run tasks in SRB mode to use zIIP processing. Specify SRB mode in the SMPTASK MUF startup option (see SMPTASK). The ZIIP_USER_LIMIT MUF startup option can be useful as a tuning option but is not required to do zIIP processing. 

There is a MUF EOJ Report for zIIP which should show if zIIP is enabled correctly, see section "ENCLAVE SRB USE SUMMARY INFORMATION" of the MUF EOJ Report. 

Refer to the Datacom database tech guide for zIIP Processors . 

Using a Datacom Files DB, processes which make a lot of use of the Datacom FDB, like IXMAINT or LISTD, should see a reduction, but ARCHIVE and BACKUP would not see much.