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performance issue

Perl version supplied with RHEL has bug, which will result code running at least 100 times slower than expected speed. Now, Red Hat updated perl packages that fix a performance issue. Earlier only solution was installing your own perl under /usr/local or other location. This fix will now take care of performance penalty.

Perl is a high-level programming language commonly used for system administration utilities and Web programming.

These updated packages fix a large performance degradation. This issue was most noticeable when using "bless" and "overload" combinations, as well as when using the Perl DBI modules.

Users of perl are advised to upgrade to these updated packages, which resolve this issue.

How do I update perl under RHEL / CentOS Linux?

Type the following command
# yum update

Recently, I received a call from client about FTP server not working. Basically, someone was trying to
access networked file system mounts such as cifs and nfs via ftp. This is bad idea and it will result into problems because it is not supported by many applications (I'm not talking about cluster file system here). There are many issues with this kind of weird setup:

+ Permission problem
+ I/O Problem
+ Performance issue etc

Some FTP server do offer work around but I don't recommend exporting networked file system via another file system.

Bottom line, don't mix networked file system with each other.