Installation Manual

HP StorageWorks File System Extender Software installation guide for Linux 13
Reasons for organizing file systems
There are several reasons why you need to re-organize file systems on the machine that will host the FSE
software:
• Increase reliability of the core FSE databases.
FSE databases are vital FSE components and need to be secured to allow the FSE implementation to
become as stable as possible. Splitting the file system, which contains FSE databases, into several file
systems provides increased security.
• Reserve sufficient disk space for FSE databases, FSE log files, and FSE debug files.
FSE databases, FSE log, and FSE debug files can grow quite large in time. Gradually, some file systems
that hold these files can become full, which may lead to partial or complete data loss. For more
information on calculation of the required disk space, see ”Estimating the size of file systems” on
page 14.
On the consolidated FSE system or FSE server, HP recommends that you use Logical Volume Manager
(LVM) volumes for storage of file systems that are used for FSE disk media. This will increase flexibility and
robustness of the file systems that store FSE disk media.
Organizing the file system layout
During the FSE installation process, several new directories are created and FSE-related files are copied to
them. Some of the directories in the FSE directory layout are crucial for correct operation of an FSE
implementation. For improved robustness and safety purposes, they must be placed on separate file
systems. This prevents problems on one directory influencing data on any of the others. In case of the FSE
disk buffer, this may also improve the overall performance of the FSE system.
The directories and the required characteristics of the mounted file systems are listed in Table 3 and
Table 4, according to their location in the FSE implementation.
Temporary files in FSE disk buffer Total storage space on file systems or
volumes that are assigned to the FSE
disk buffer should be at least 10% of
total storage space on all HSM file
systems in the FSE implementation.
”
Space requirements of FSE disk
buff
er
” on page 17
Debug files Debug files are optional but may
grow and fill up the file system.
Dedicate a separate file system to
debug files and use a symbolic link,
or mount another file system to the
debug files directory.
”
Storage space for FSE debug
files
” on page 18
Table 2 Pre-installation size considerations
Parameter Description Reference