Chapter 2 HPSS Planning
46 September 2002 HPSS Installation Guide
Release 4.5, Revision 2
TheGeneric Security Service (GSS) FTP (available from the Massachusetts Institute of Technology,
MIT) and Parallel FTP applications may also take advantage of the Cross Cell features for
authentication and authorization. Use of Kerberos/DCE Credentials with the HPSS Parallel FTP
Daemonrequires using the hpss_pftpd_amgr server and an associated authentication manager in
place of the standardhpss_pftpd. Both the GSSFTP from MIT and the krb5_gss_pftp_client
applications may use the Cross Cell features (subject to certain caveats! – See FTP documentation
fordetails.) Thekrb5_gss_pftp_client is not distributed by the HPSS project; but may be built from
distributedsource by the HPSS sites. It is the site's responsibility to obtain the necessary Kerberos
components (header files, library files, etc.)
Local Location Servers exchange server information with remote Location Servers for both inter-
subsystem and HPSS Cross Cell communications. It is necessary to add a record to the Remote
Sites metadata file for each remote HPSS system you are connecting to in order to tell each local
Location Server how to contact its remote counterpart. To do this, the Local HPSS will need to
obtain all of the information contained in the Remote HPSS Site Identification fields from the
remote site's Location Policy screen. Similarly, information from the Local site's Location Policy
screen will be required by the Remote HPSS site in the Remote Site's policy file.
ACLson HPSS CDS Objects and/or HPSS directories/files may need to be added for appropriate
foreign_user and/orforeign_group entries.

2.2.8 Availability

The High Availability component allows HPSS to inter operate with IBM’s HACMP software.
When configured with the appropriate redundant hardware, this allows failures of individual
system components (network adapters, core server nodes, power supplies, etc.) to be overcome,
returningthe system to resume servicing requests with minimal downtime. For more information
on the High Availability component, see Appendix G: High Availability (page 535).
2.3 Prerequisite Software Considerations
This section defines the prerequisite software requirements for HPSS. These software products
must be purchased separately from HPSS and installed prior to the HPSS installation and
configuration.

2.3.1 Overview

A summary of the products required to run HPSS is described in the following subsections.

2.3.1.1 DCE

HPSSuses the Distributed Computing Environment (DCE) and operates within a DCE cell. HPSS
requires at least one (1)DCE Security Server and at least one (1) DCE Cell Directory Server.
Anadditional Security Server can be added into the configuration on a different machine to provide
redundancy and load balancing, if desired. The same is true for the Cell Directory Server.