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Redhat's Global Filesystem

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Maaz
Valued Contributor

Redhat's Global Filesystem

We are planning to implement HP ServiceGuard for Clustering of Linux(Redhat AS 4, SUSE 10)servers.

Should we need the redhat GFS ?
Does ServiceGuard provides something equivalent/better of redhat's GFS. ?
Redhat's GFS competetor ?

Regards
7 REPLIES
Maaz
Valued Contributor

Re: Redhat's Global Filesystem

what about OCFS2 ? is it equivalent/better then Redhat's GFS ?
Ivan Ferreira
Honored Contributor
Solution

Re: Redhat's Global Filesystem

>>> Should we need the redhat GFS ?

You can use RAW devices or OCFS2.

>>>what about OCFS2 ? is it equivalent/better then Redhat's GFS ?

OCFS2 would be equivalent than Red Hat GFS. Please see:

www.oracle.com/technologies/linux/ubl-faq.pdf

"Red Hat Global File System (GFS) and Red Hat Cluster Suite (RHCS) are part of RHEL5 and OEL5 so they are supported by Oracle under the Unbreakable Linux Program. However, since GFS and RHCS are not included with RHEL4, OEL4 and earlier versions, they are not supported by Oracle with RHEL4, OEL4, and earlier versions."

Redhat's GFS competetor ?

Veritas.


Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Steven E. Protter
Exalted Contributor

Re: Redhat's Global Filesystem

Shalom,

Serviceguard does not provide a filesystem. Serviceguard is a clustering package that permits the high availability setup and package failover.

GFS is a cluster enabled filesystem that is designed to work with Red Hat Cluster Suite, which does provide roughly the same functionality of Servicdguard.

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Maaz
Valued Contributor

Re: Redhat's Global Filesystem

Ivan
>You can use RAW devices ...
A High Availability Cluster of almost 7 Database Servers using SAN of RAW devices.. does it make sense.. or does it worthed ? Ivan this is simply a question(my english is not good, might be I used hard words)

I mean, i think its almost necessary to use a cluster aware filesystem for the storage on SAN, as these storage devices are shared among multiple Servers.

I need help, in this regard to make the decisions.

Any one has experiene of using OCFS and/or Redhats' GFS ? which one is more reliable/stable ?

Thanks n Regards
Maaz
Ivan Ferreira
Honored Contributor

Re: Redhat's Global Filesystem

RAW devices can be used for shared access if you use Oracle Real Application Clusters, so in that case you won't need a cluster file system. But, RAW management is harder, so is better if you use a shared file system. As Oracle provides OCFS2 for free, you can use OCFS2 instead of RAW devices.

>>> Any one has experiene of using OCFS and/or Redhats' GFS ? which one is more reliable/stable ?

I know peple using OCFS without any problems. We use GFS and works without problems also. In this case, I think that the desition is up to you.
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Don Vanco - Linux Ninja
Regular Advisor

Re: Redhat's Global Filesystem

GFS is stable, and is a great filesystem. RH has great instructions for using it in RAC (and ServiceGuard)
http://www.google.com/url?sa=t&ct=res&cd=3&url=http%3A%2F%2Fwww.redhat.com%2Ff%2Fpdf%2Fgfs%2FINS_91569US_0805.pdf&ei=eC6-R-jbJpOaeJvT0esO&usg=AFQjCNHxOYjCIGdjnRY9yYkat5LHMuJytA&sig2=qNDSW_u58WbrwIw7YWpdVQ

However (and I'm no expert here, I've just read a few bits) one of the advantages of OCFS2 is it's ability to support various block sizes without relying on the same buffering that presents limitations to efficiency in Linux filesystems. This is particularly effective for datawarehousing applications where larger block sizes are advantageous.

If you need me to I can see if I can dig up the docs I have or the links I found....

DV-LN
Maaz
Valued Contributor

Re: Redhat's Global Filesystem

Hi DV-LN, thanks for your support.

>If you need me to I can see if I can dig up the docs I have or the links I >found....

Welcome dear, I am waiting ;)