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Operating Systems Linux Red Hat GFS file system performance is very slow Post 302616267 by mark54g on Friday 30th of March 2012 07:34:35 PM
Old 03-30-2012
GFSv1 is VERY slow, mostly due to locking issues on inodes. If you use a top level single directory as your shared storage, anything inside can lock the directory inode, which causes VERY poor performance.

Shared filesystems tend to have overhead that already cost you about 12-20% performance penalties.
 

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Apache::Session::Store::File(3pm)			User Contributed Perl Documentation			 Apache::Session::Store::File(3pm)

NAME
Apache::Session::Store::File - Store persistent data on the filesystem SYNOPSIS
use Apache::Session::Store::File; my $store = new Apache::Session::Store::File; $store->insert($ref); $store->update($ref); $store->materialize($ref); $store->remove($ref); DESCRIPTION
This module fulfills the storage interface of Apache::Session. The serialized objects are stored in files on your filesystem. OPTIONS
This module requires one argument in the usual Apache::Session style. The name of the option is Directory, and the value is the full path of the directory where you wish to place the files. Example tie %s, 'Apache::Session::File', undef, {Directory => '/tmp/sessions'}; NOTES
All session objects are stored in the same directory. Some filesystems, such as Linux's ext2fs, have O(n) performance where n is the number of files in a directory. Other filesystems, like Sun's UFS, and Linux's reiserfs, do not have this problem. You should consider your filesystem's performance before using this module to store many objects. AUTHOR
This module was written by Jeffrey William Baker <jwbaker@acm.org>. SEE ALSO
Apache::Session perl v5.10.1 2010-10-18 Apache::Session::Store::File(3pm)
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