03-03-2005
redhat.com has a lot of the info you are looking for, just dig around the docs and whitepapers. I have not seen a firm date for the release of cluster suite or GFS but I haven't spent a lot of time looking. I would imagine it would be soon, especially for Cluster Suite.
RHAS 3.0 was right on the edge of being what I would consider an enterprise OS. RHAS 4.0 with the 2.6 kernel and a few other features have pushed it into that category for me. The best part is the OS out of the box has the features you need. You don't need to buy Veritas, OnlineJFS, mulipathing software, or anything else to make it viable.
Convincing management to go to linux is a task. I have had several discussions. I think in the next few years it will become easier. We are really just at the beginning of major acceptance of linux in the enterprise, at least for apps other then web, mail, dns, and printing.
Market survey info should give you enough info to show the trend is heading toward linux. It has scared IBM and Sun enough to adapt a linux methodology to their OSes. Solaris is opensource and know you just pay for support (sounds just like Red Hat and SuSe). AIX has some linux features like RPM.
The biggest point that comes up in coversations I have had with managment is that hardware becomes the commodity. If you are running on HP and don't like it, it's easy to switch to IBM without switching OS. You can't do that with HPUX, Solaris, or AIX.
Sooner or later Linux/opensource will be the reality.
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LEARN ABOUT CENTOS
mountpoint
MOUNTPOINT(1) User Commands MOUNTPOINT(1)
NAME
mountpoint - see if a directory is a mountpoint
SYNOPSIS
mountpoint [-q] [-d] directory
mountpoint -x device
DESCRIPTION
mountpoint checks if the directory is mentioned in the /proc/self/mountinfo file.
OPTIONS
-h, --help
Print help and exit.
-q, --quiet
Be quiet - don't print anything.
-d, --fs-devno
Print major/minor device number of the filesystem on stdout.
-x, --devno
Print major/minor device number of the blockdevice on stdout.
EXIT STATUS
Zero if the directory is a mountpoint, non-zero if not.
AUTHOR
Karel Zak <kzak@redhat.com>
ENVIRONMENT
LIBMOUNT_DEBUG=0xffff
enables debug output.
NOTES
The util-linux mountpoint implementation was written from scratch for libmount. The original version for sysvinit suite was written by
Miquel van Smoorenburg.
SEE ALSO
mount(8)
AVAILABILITY
The mountpoint command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux June 2011 MOUNTPOINT(1)