HP-UX HB v13.00 Ch-14 - JFS

HP-UX Handbook – Rev 13.00 Page 15 (of 47)
Chapter 14 Journaled File System (JFS)
October 29, 2013
(VxVM).
File Change Log
The VxFS File Change Log (FCL) tracks changes to files and directories in a file system. The
File Change Log can be used by applications such as backup products, webcrawlers, search and
indexing engines, and replication software that typically scan an entire file system searching for
modifications since a previous scan.
NOTE: FCL functionality is a separately licensed feature.
Multi-volume support
The multi-volume support (MVS) feature allows several volumes to be represented by a single
logical object. All I/O to and from an underlying logical volume is directed by way of volume
sets.
This feature can be used only in conjunction with VxVM.
NOTE: MVS functionality is a separately licensed feature.
Dynamic Storage Tiering
The Dynamic Storage Tiering (DST) option is built on multi-volume support technology. Using
DST, you can map more than one volume to a single file system. You can then configure policies
that automatically relocate files from one volume to another, or relocate files by running file
relocation commands. Having multiple volumes lets you determine where files are located,
which can improve performance for applications that access specific types of files.
NOTE:
DST functionality is a separately licensed feature and is available with the VRTSfppm
package.