Description: Performance of large directories is enhanced by using new version 1.5 aggregates and extended v5 directories. Conversion from current version 1.4 aggregates to version 1.5 aggregates can be done offline with the batch utility ioefsult converttov5, manually with the zfsadm convert command or automatically by use of the new converttov5 IOEFSPRM configuration option and mount parameter. Version 1.5 aggregates can also be created with a -version5 parameter on the zfsadm format command or with the ioeagfmt or ioefsutl format batch utilities.
When change was introduced: z/OS® V2R1.