User's Manual

Appendix B StorNext Administration Tasks
Avoiding Poor System Performance
StorNext 3.1.3 Installation Guide 124
Avoiding Poor System Performance
Most systems run administrator scripts to rebuild namespace databases
and/or to remove certain files. Unfortunately, running these scripts can
degrade StorNext performance. It is recommended that you review
administrator scripts to determine if they may adversely affect your
StorNext installation and its performance.
For example, many UNIX systems have a find command in the root
crontab
that traverses the entire directory hierarchy while searching for
old temporary and core files. Typically, the
find commands are configured
only to run on the local file system. However by default, these commands
do not skip StorNext file systems because they are considered to be local,
even though the file system manager may be running remotely. StorNext
performance can be dramatically degraded when these commands visit a
StorNext file system if the system contains a large number of files.
If StorNext performance is degraded to an unacceptable level due to the
operation of administrator scripts, you can modify them to skip StorNext
file systems. A sample command (original and modified is shown below:
On IRIX, by default, the root crontab contains the following find
command:
find / -local -type f '(' -name core -o -name dead.letter ')' -atime +7 -mtime + 7
-exec rm -f '{}' ';'
To prevent the find command from searching in StorNext file systems,
modify it as shown:
'(' -type d -fstype cvfs -prune ')' -o
The modified find command looks like this:
find / -local '(' -type d -fstype cvfs ')' -o -type f '(' -name core -o -name
dead.letter ')' -atime +7 –mtime +7 -exec rm -f '{}' ';'