IBM Z Hardware and Operating Systems Ideas Portal


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z/OS File System (zFS)

Showing 19

zfsadm shrink should provide means to mount R/O filesystem R/W, then switch back to R/O after zfsadm shrink completes

zfsadm shrink requires too much manual intervention to be useful. Forcing a user to manually remount the filesystem R/W, then remount it again as R/O is time-consuming and error prone. zfsadm shrink should provide a means to do this automatically....
over 1 year ago in z/OS / z/OS File System (zFS) 1 Future consideration

Enhance zfsadm shrink command

Enhance zfsadm shrink command to give the new size not only in K-bytes but also by a percentage value based on the current size. For example a value of 50 to reduce to half the size. This would allow to have an automated process to reduce size of ...
almost 2 years ago in z/OS / z/OS File System (zFS) 2 Future consideration

zFS Striped restriction

Currently in z/OS zFS does not support the use of a striped VSAM linear data set as a zFS aggregate. StripedVSAM linear data set will only mount as read-only.
about 3 years ago in z/OS / z/OS File System (zFS) 0 Future consideration

Produce SMF 92 subtype 2 and 4 during backup of ZFS mounted in RWSHARE mode

During the dump process of a ZFS mounted in rw mode, a quiesce is done before the dump and an unquiesce is issued after the dump. SMF 92 subtype 2 is written when the filesytem is quiesced, and a subtype 4 is produced when it is unquiesced. This a...
over 4 years ago in z/OS / z/OS File System (zFS) 1 Future consideration

Allow zFS Salvager to Check ACLs while File System is Mounted

There is an undocumented option of the salvager: CHECK_ACL_CONSISTENCY=ON to check and repair a file system with ACL problems.This feature should be documented and at least the check for problems should be possible for a mounted file system.
almost 6 years ago in z/OS / z/OS File System (zFS) 1 Future consideration

zFS ACCESS Security

We ask z/OS Security Server to be enhanced to permit zFS to be easily protected, like HFS current protection running for the early life of HFS on z/OS.
over 6 years ago in z/OS / z/OS File System (zFS) 1 Functionality already exists

IOEFSUTL format and other functions should identify the Version of the zFS formatted or changed

When formatting a zFS, IOEFSUTL does not identify what Version of zFS (currently V4 or V5) that it actually formatted. As seen in the Use Case in this requirement, lots of data about bytes and traces and details of the service level of the tool it...
about 7 years ago in z/OS / z/OS File System (zFS) 1 Future consideration

Delay of zFS write with sync I/Os - z/OS 2.2

Applications are experiencing huge delays when zFS is performing a write with SYNC against large files, the frequency of SYNCs are low, and there are many concurrent tasks trying to perform operations on the same file.
over 7 years ago in z/OS / z/OS File System (zFS) 1 Not under consideration

Take advantage of DAE to suppress dumps

We encountered a situation where the zFS address space was taking 2C3 abends. The abend would sometimes occur more than once a day. DAE was not suppressing the dumps. Coding of the SDUMPX macro should be changed to take advantage of letting DAE su...
almost 9 years ago in z/OS / z/OS File System (zFS) 1 Future consideration

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