Chapter 2 HPSS Planning
132 September 2002 HPSS Installation Guide
Release 4.5, Revision 2
If the file systems used to store the MRA files becomes full, SFS will not run.
MRAfiles are written to the directory /opt/encinalocal/encina/sfs/hpss/archives. Before Encina is
configuredas described in Section 5.5.2: ConfigureEncina SFS Server (page 243), a separate mirrored
file system should be created (e.g./sfsbackups/mra), and an appropriate link created from the
directorymentioned above. For example, if the file system was called /sfsbackups/mra, then create
the following link:
% ln -s /sfsbackups/mra \
/opt/encinalocal/encina/sfs/hpss/archives
TheMRA files should not be on the same disk as the Encina transaction log or the Encina data files.
• Encina SFS Backup Files (TRB files)
SFS has the ability to generate on-line backup files while continuing to service HPSS metadata
requests. It is important to generate regular backups of SFS in case of future disk failures.
The HPSS utility,sfsbackup, should be used to generate the Encina SFS backup files, sometimes
referredto as the TRB files. A single TRB file will be generated for each Encina SFS data volume on
each run of the utility. TRB files should be stored on a separate file system that is mirrored (e.g./
sfsbackups/trb).The TRB files should not be on the same disk as the MRA files, Encina transaction
log,or Encina data files. If you are limited by the number of physical volumes (disk drives) that are
availablefor your HPSS system, you can put the MRA file system and TRB file system on the same
diskas long as the file systems are both mirrored (this is NOT the recommended configuration). It
is recommended that at least 2 GB of disk space be available for the TRB files.
sfsbackupis also used to backup and manage the MRA files. As TRB files are generated, the older
MRA files are no longer needed. Thesfs_backup_util should be configured to remove the
unneeded MRA and TRB files.
If the file systems used to store the TRB files becomes full, thesfsbackup will fail.
2.10.3 System Memory and Disk Space2.10.3.1 Disk Space Requirements for HPSS Installation
The HPSS software is installed in the/opt/hpss directory. The installation package sizes and disk
requirements are listed in Table 4-1:Installation Package Sizes and Disk Requirements on page 206.
2.10.3.2 Disk Space Requirements for Running HPSS Servers
Someof the Unix configuration files required by the HPSS servers and other files generated during
theirexecutions are usually placed in the /var/hpss directory by default. There should be sufficient
disk space available to accommodate these files. The following subsections describe the space
requirements needed for running the individual HPSS servers: