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тАО11-17-2006 07:05 AM
тАО11-17-2006 07:05 AM
LVM vs VxVM
I have been tasked to buil some new Oracle DB servers. We purchase 2 rx3600s and 2 rx6600s.
I need to install 11.23 Enterprise, service guard 11.17 and Veritas CFS 4.1. My question is more towards the initial install of the OS.
You have 3 choices at install, the default is LVM, Vertias VxFS VxVM, and I can't remember the third, but I think it's whole disk VxFS.
If I choose Vertias VxFS VxVM, is that the same as installing LVM and the installing VxFS 4.1 after that?
Does anyone have any suggestions or best practices?
Thanks,
Josh
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тАО11-17-2006 07:14 AM
тАО11-17-2006 07:14 AM
Re: LVM vs VxVM
NO. I think you're confusing VxVM and VxFS. VxFS is the Veritas File System, sometimes know as the Journaled File System. It is generally used because it offers superior fsck startup times over the older HFS file systems. You can have VxFS file systems no matter which volume manager you choose: VxVM or LVM.
Pete
Pete
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тАО11-17-2006 07:41 AM
тАО11-17-2006 07:41 AM
Re: LVM vs VxVM
No. It means your OS will be encapsulated and managed by VxVM. Also called "rootability"
Our configs at 11.11 have LVM as still being managed by LVM whilst the rest are all VxVM. The reason was we've already existing tools and processes for the backup and recovery and ignitiion of our OS disks managed by LVM.
But since you will be starting fresh, I suggest you use entirely VxVM. Note though that with even Enterprise OE HPUX - VxVM is not fully licensed so you do not get DMP, ceertain storage layouts, etc. But it should be sufficient for protecting your OS disks and some basic non-OS carving of disks specially if those disks are already protected/RAIDed any way by say PowerPath, SecurePath, etc....
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тАО11-17-2006 07:53 AM
тАО11-17-2006 07:53 AM
Re: LVM vs VxVM
So, I think I understand. My SAN administrator needs to be able to run vg commands to allocate disk space for all of the oracle instances that will be run on these boxes. So if I understand correctly, I would want to install the OS with the default LVM with VxFS and install the Veritas CFS in order for that to work, right?
Thanks,
josh
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тАО11-17-2006 07:59 AM
тАО11-17-2006 07:59 AM
Re: LVM vs VxVM
for your initial OS installation it is OK to go for LVM as volume manager and vxfs as the filesystem.
You can take different choices for your data disks/filesystems - ask your dba guys.
Hope this helps!
Regards
Torsten.
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тАО11-19-2006 06:14 PM
тАО11-19-2006 06:14 PM
Re: LVM vs VxVM
Hi,
With VxVM, you can mirror your root volume without LVM Mirror-UX, a priced product.
BR
Vasu
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тАО11-20-2006 12:17 AM
тАО11-20-2006 12:17 AM
Re: LVM vs VxVM
These are the steps I used, but if this incorrect, can someone please correct me.
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тАО12-24-2006 10:42 PM
тАО12-24-2006 10:42 PM
Re: LVM vs VxVM
hi every body, i agree with u on this we can mirror root volume without Mirror-UX.
but to do that i have to encapsulate my disk under Vxvm or under LVM
thanks
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тАО12-25-2006 01:31 AM
тАО12-25-2006 01:31 AM
Re: LVM vs VxVM
I prefer LVM, even if it makes me pay for software mirroring. Thats because of history and I like using the same commands on Linux and HP-UX./
Its a matter of personal perference though.
Note that we have not certified SG 11.17 yet but found SG 11.16 very stable and are using it widely. I'm sure SG 11.17 is good but we're cautious on important software like this.
SEP
Owner of ISN Corporation
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http://hpuxconsulting.com
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тАО01-08-2007 12:25 AM
тАО01-08-2007 12:25 AM
Re: LVM vs VxVM
I will be a bit biased, because I support vxvm on HP-UX. ;)
Best practice for production systems.
OS/OS applications
Install the OS/ OS applications, f.e. mc/sg on local disks. Use LVM as volumemanager and mirror the OS, with the mirrordisk/UX product over the 2 local disks. The (support) cost of mirrordisk/UX is negligable compared to f.e. the cost of a cfs 4.1 license or a oracle (10g) db license.
Oracle binaries
Create a lun on the diskarray, that can hold the oracle binaries. Volumemanager to manage the lun, would be vxvm.
(if you have redundant diskarrays, create 1 lun on each diskarray and vxvm-mirror the luns between the diskarrays)
Oracle databases
To create a 2node MC/SG 11.17 cfs 4.1 cluster, the luns will have to be managed by vxvm. On top of the vxvm luns, shared cfs filesystems will then need to be created.
Greetz,
Chris