It is critical during the set up of the PSE environment that any file systems needed by an application or user be mounted and accessible to all PSE cluster members, as shown in Figure 12-1.
In addition to the current working directory and executable path, any data files required by the application must also be accessible using a common pathname. If a file system containing information that a program requires is mounted on one PSE cluster member and not another, the program may exit abnormally.
A user must have remote shell rsh access from any
PSE cluster member to any other PSE cluster member in order to
successfully run PSE applications. To accomplish this, each PSE
user should have a $HOME/.rhosts file that includes all
PSE cluster members that run PSE applications.
It is important that file path names be identical on all PSE cluster members. If different cluster members use different paths to the same file, the file may be found by one member and not another, causing the application to exit abnormally.
Digital recommends a combination of NFS
and automount to share file systems among PSE cluster
members. It is further recommended that NIS be used to distribute
automount maps.
