Veritas Volume Manager - largest LUN?
13 August 2002, 05:53 PM
#1
Scooby Regular
Thread Starter
Join Date: Mar 2001
Location: Berkshire
Posts: 5,528
Likes: 0
Received 0 Likes
on
0 Posts
I have a 1TB LUN that I want to present to VxVM and mirror. Does anyone know if VxVM will handle this LUN and also what the largest LUN that VxVM can handle is ? I have searched the web and Veritas pages for ages and cant find anything 
Dave
Dave
13 August 2002, 06:30 PM
#2
Scooby Regular
Join Date: Apr 2001
Location: Hants
Posts: 1,103
Likes: 0
Received 0 Likes
on
0 Posts
Most file systems are limited to 2Tbytes atm so would assume VxVM has the same limit.
*** Edited to add ***
Are you going to have only one volume? If so what file system? Would be silly to do this if you ask me!
[Edited by orbv - 8/13/2002 6:32:01 PM]
*** Edited to add ***
Are you going to have only one volume? If so what file system? Would be silly to do this if you ask me!
[Edited by orbv - 8/13/2002 6:32:01 PM]
13 August 2002, 09:46 PM
#3
Scooby Regular
Thread Starter
Join Date: Mar 2001
Location: Berkshire
Posts: 5,528
Likes: 0
Received 0 Likes
on
0 Posts
Thanks orbv. I thought it was either 2 or 4Tb but was not sure.
It is purely for performance testing on a FibreCAT (EMC Clariion)
Dave
[Edited by druddle - 8/13/2002 9:47:39 PM]
It is purely for performance testing on a FibreCAT (EMC Clariion)
Dave
[Edited by druddle - 8/13/2002 9:47:39 PM]
14 August 2002, 01:15 PM
#4
Scooby Regular
Join Date: May 2001
Posts: 672
Likes: 0
Received 0 Likes
on
0 Posts
Hi,
Don't know about solaris, I heard that the logical limit was 2TB for vxfs, and files of up to 1TB.
You start getting into problems with UFS on filesystems that have logging enabled. It uses a buffer of 1m per 1gig of filesystem, up to a maximum of 64gig. So if you are hammering the filesystems you can potentally fill up the logging subsystem!
If you want massive storage, go with QFS ( quality file system) from sun. It supports up to 18.5 exabytes! (18.5 billion gigabytes)
I think that if you present smaller luns to solaris and then use volume mangler to concat them it would perform better..
Don't know about solaris, I heard that the logical limit was 2TB for vxfs, and files of up to 1TB.
You start getting into problems with UFS on filesystems that have logging enabled. It uses a buffer of 1m per 1gig of filesystem, up to a maximum of 64gig. So if you are hammering the filesystems you can potentally fill up the logging subsystem!
If you want massive storage, go with QFS ( quality file system) from sun. It supports up to 18.5 exabytes! (18.5 billion gigabytes)
I think that if you present smaller luns to solaris and then use volume mangler to concat them it would perform better..
Thread
Thread Starter
Forum
Replies
Last Post