February 2010
Intermediate to advanced
460 pages
16h 22m
English
book
z/OS Distributed File Service zSeries File System Implementation z/OS V1R11
by Paul Rogers, Robert Hering
Content preview from z/OS Distributed File Service zSeries File System Implementation z/OS V1R11
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2 z/OS Distributed File Service zSeries File System Implementation z/OS V1R11
1.1 zSeries File System introduction
The z/OS Distributed File Service (DFS) zSeries File System (zFS) is a z/OS UNIX file
system that can be used in addition to the Hierarchical File System (HFS). zFS provides
significant performance gains in accessing files approaching 8 K in size that are frequently
accessed and updated. The access performance of smaller files is equivalent to that of HFS.
zFS provides reduced exposure to loss of updates by writing data blocks asynchronously and
not waiting for a sync interval. zFS is a so-called “journaling” file system. It log
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