From: ALLEN, David (David.ALLEN@eur.crowncork.com)
Date: Wed Feb 14 2007 - 05:01:59 EST
[demime could not interpret encoding quoted-printable - treating as plain text]
Hello all.
Thanks for all your emails on this subject, but I am still confused about th=
e abilities of Sun Cluster. Yes, it can do fall over and load balancing. How=
ever, can it cluster file systems? For example, can two nodes of a cluster b=
oth NFS export the same filesystem from a SAN disk at the same time, concurr=
ently, with the cluster software handling the disk locking?
Page 41 from the Sun Cluster Concepts Guide suggests it can viz "Coherency p=
rotocols are used to preserve the UNIX file access semantics even if the fil=
e is accessed concurrently from multiple nodes" and "A process can open a fi=
le that is located anywhere in the system". I guess a load balanced NFS conf=
ig would need this functionality?
However, my understanding of the concept may be wrong, and many of you belie=
ve Sun clusters CAN NOT cluster files systems, and when one node files, the=
file system has to be switched to another node using metadisks etc. Has any=
one got a Sun file cluster running?
I realize there may be better OS's to for clustering but unfortunately I am=
stuck with Sun and on a tight budget!
Thanks in advance for any comments.
David
________________________________
From: joe fletcher
Sent: Tue 13/02/2007 22:36
To: ALLEN, David
Subject: RE: Veritas, disksuite, SDS etc
You've got to understand that when it comes to real clustering SUN have esse=
ntially zero experience. The two serious players in the market historically=
were IBM and DEC.
The best unix clustering is/was Tru64 because they leveraged the VMS technol=
ogies. In case you didn't know all the flash Oracle RAC/10g was essentially=
based on Trucluster. Nothing new under the sun eh?
As I see it there are two ways to approach your solution. Run some replicate=
d SAN storage shared out across and NFS cluster or use Veritas cluster file=
system.
AFAIK SUN don't do their own cluster file system. Don't know if zfs qualifie=
s.
Veritas pretty much have the market to themselves.
CONFIDENTIALITY NOTICE The information contained in this=0A=
e-mail is intended only for the confidential use of the above=0A=
named recipient. If you are not the intended recipient or person=0A=
responsible for delivering it to the intended recipient, you have=0A=
received this communication in error and must not distribute or =0A=
copy it. Please accept the sender's apologies, notify the sender =0A=
immediately by return e-mail and delete this communication.=0A=
Thank you.
_______________________________________________
sunmanagers mailing list
sunmanagers@sunmanagers.org
http://www.sunmanagers.org/mailman/listinfo/sunmanagers
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 23:41:38 EDT