pasterfinda.blogg.se - Centos 6 read hfs file system

Using TSO option 6, enter the following command :.

HFS uses 16-bit integers for addressing limiting the maximum number of files. HFS+ was introduced to replace the standard Hierarchical File System (HFS). Define zFS aggregates by default to be approximately the same size as the HFS. If the HFS being migrated is mounted, the tool automatically unmounts it and then mounts the new zFS file system on its current mount point.

Stored dates can be in the range of Januto Februjust like with HFS. Migrate HFS file systems (both mounted and unmounted) to zFS file systems. You can mount a ZFS file with the mount command MOUNT FILESYSTEM('') MOUNTPOINT('path/name TYPE(ZFS) MODE(RDWR)')ĬOPYTREE Command: Ensure both your SOURCE HFS and TARGET ZFS are mounted. The file allocation is stored in a bitmap file, while bad blocks are tracked by a B-Tree file.

Note that the zfs file name in the format job is case sensitive and the parameters must be in lower case as shown. This is just a standard VSAM allocation, you make the file zFS by formatting it with the IOEAGFMT utility. You Can Use IDCAMS to allocate a ZFS datasets DEFINE CLUSTER(NAME(). For exanple zFS is limited to 64K subdirectories per directory. However, zFS has performance limitiations for very large directories that are not seen with HFS. zFS files need to be initialized before use whereas HFS files are ready to go once defined. Unlike HFS which runs in the USS address space, zFS runs in its own address space. There is another type of ZFS file called NFS, which allows you to access file spaces on remote servers. The z/F S data and interfaces are DFS compliant. zFS is basically a bit better than HFS as it is faster and uses space more efficiently and also supports files system based transaction logging for point in time recovery. Each VSAM file can host several zFS file systems.