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Re: sharing file system using LVM and SG

 
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Jose Manuel Gonzalez
Occasional Advisor

sharing file system using LVM and SG

Somebody know how to share a file system using LVM and SG without used the network.
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8 REPLIES 8
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Re: sharing file system using LVM and SG

You mean like a cluster filesystem? Concurrent access from 2 nodes to a shared disk/LUN?

You can't do that with Serviceguard and LVM.

You can do it with Serviceguard and the cluster version of VxVM and VxfS. It's packaged up as the Serviceguard Storage Management Suite Cluster Filesystem:

http://h71028.www7.hp.com/ERC/downloads/4AA0-1468ENW.pdf

HTH

Duncan

I am an HPE Employee
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Jose Manuel Gonzalez
Occasional Advisor

Re: sharing file system using LVM and SG

It's correct. I'm using 11i V1. MCOE with SG in a 2 node Oracle 10G RAC with raw devices, and we need to share a file system for archive logs. Do I need buy CFS?
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Re: sharing file system using LVM and SG

For sharing archive logs, the only other option to a CFS is NFS mounts using the HA NFS toolkit (which you will already have if you're using MCOE)

Either that or you ditch Serviceguard completely and use the Oracle clusterware stack with ASM - though I wouldn't reccomend that approach.

HTH

Duncan

I am an HPE Employee
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Jose Manuel Gonzalez
Occasional Advisor

Re: sharing file system using LVM and SG

One question more, do you no if CFS it's part of MCOE?

I have the followed software:

PHCO_29606 1.0 VERITAS VM Provider Patch for NBU 5.0
PHCO_30700 1.0 VERITAS File System Mgmt Srvc Provider Pa
tch
PHCO_30730 1.0 VERITAS Enterprise Administrator Srvc Pat
ch
PHCO_30731 1.0 VERITAS Enterprise Administrator Patch
PHCO_34348 1.0 VERITAS VM Mgmt Service Provider Patch 05

VRTSfspro 3.5-ga08 VERITAS File System Management Services P
rovider
VRTSob 3.0.2.261a VERITAS Enterprise Administrator Service
VRTSobgui 3.0.2.261a VERITAS Enterprise Administrator
VRTSvlic 3.00.007e VERITAS License Utilities
VRTSvmdoc 3.5m VERITAS Volume Manager Documentation
VRTSvmpro 3.5m VERITAS Volume Manager Management Service
s Provider
VRTSvxvm 3.5m Base VERITAS Volume Manager 3.5 for HP-UX

and do you have some documents about how to configure CFS in a similar configuration like my?

Thanks.

JM
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A. Clay Stephenson
Acclaimed Contributor

Re: sharing file system using LVM and SG

No, you need the SG eRAC package. Not all (or even nearly all) boxes that run SG run Oracle RAC. You need to purchase the additional product.
If it ain't broke, I can fix that.
Jose Manuel Gonzalez
Occasional Advisor

Re: sharing file system using LVM and SG

Talking about SG we have installed this:

T1859BA A.11.16.00 Serviceguard Extension fo
r RAC

do you have some document about how to configure a shared filesystem using CFS in a configuration like my?

Thanks.

JM
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Re: sharing file system using LVM and SG

Jose,

Ok a couple of extra points:

1. The SGeRAC product does not in itself contain the cluster filesystem components - they are an additional piece of software with additional cost.

2. What I missed in your earlier responses was that you were on 11iv1. Unfortunately the CFS solution is for 11iv2 only as it relies on newer versions of VxVM which were never ported back to 11iv1.

This limits your choices a bit. Either:

1. Stick with NFS mounts. This can be done ina HA fashion if you use the latest version of the NFS automounter and are careful about mount options with NFS (the Serviceguard extension for SAP manual is a good source on how to configure NFS in a HA fashion)

2. Go to a complete Oracle stack with ASM and no Serviceguard. This probably costs less than option 3 but has quite a few drawbacks, not least the fact that:
i) you have to provide you're own multi-pathing solution (such as secure path or powerpath). LVM PVLinks aren't much use as ASM works on raw disks.
ii) You have to provide youre own network resiliency using APA
iii) You can't really provide HA for anything except your Oracle DB
iv) The Oracle clusterware is entireley in user space, and I believe (in my subjective opinion) not as mature or reliable as Serviceguard.

3. Upgrade to 11iv2 and purchase the CFS software. This would mean trading in your existing MCOE for the MCOE with CFS (T2797BA). The software isn't cheap though, but like I said you should be able to get a trade-in for your MCOE and SGeRAC licenses.

HTH

Duncan

I am an HPE Employee
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Emil Velez
Honored Contributor

Re: sharing file system using LVM and SG


Bottom line

CFS requires 11iv2
CFS is implemented as special packages that utilize ServiceGuard
CFS has additional cost plus MCOE

CFS can be used without Oracle RAC.. IT can be used just as a cluster file systems.