Hub/Switch Installation Guide

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.
MRA files are written to the directory /opt/encinalocal/encina/sfs/hpss/archives. Before Encina is
configuredasdescribedinSection5.5.2: ConfigureEncinaSFSServer(page243),aseparatemirrored
file system should be created (e.g. /sfsbackups/mra), and an appropriate link created from the
directorymentioned above.For example,ifthefile systemwascalled /sfsbackups/mra,thencreate
the following link:
% ln -s /sfsbackups/mra \
/opt/encinalocal/encina/sfs/hpss/archives
The MRA files should notbe onthesamedisk as the Encina transaction log orthe Encinadatafiles.
• 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
referred to as theTRB files.A single TRB file willbe generatedfor each Encina SFS datavolume on
each run of the utility. TRB files should be stored on a separate file system that is mirrored (e.g. /
sfsbackups/trb). TheTRBfilesshould notbe onthe samedisk asthe MRA files, Encina transaction
log,orEncina datafiles. If youare limitedbythe numberof physical volumes(diskdrives) thatare
available for your HPSSsystem, youcanput the MRA file system andTRB filesystemon the same
disk as 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.
sfsbackup is also used to backupand managethe MRAfiles. As TRB files are generated, the older
MRA files are no longer needed. The sfs_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, the sfsbackup will fail.
2.10.3 System Memory and Disk Space
2.10.3.1 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
SomeoftheUnix configurationfiles requiredby the HPSSserversandother filesgenerated during
their executions areusually placedin the /var/hpss directoryby default.There should besufficient
disk space available to accommodate these files. The following subsections describe the space
requirements needed for running the individual HPSS servers: