HPE GreenLake Administration
- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Suggestion required on creating vg with 800gb
Operating System - HP-UX
1832984
Members
2877
Online
110048
Solutions
Forums
Categories
Company
Local Language
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Forums
Discussions
Discussions
Discussions
Forums
Discussions
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2006 01:55 AM
04-04-2006 01:55 AM
Suggestion required on creating vg with 800gb
Hi,
I need to create a VG with 800GB Single SAN Disk. I would be creating 13 LV's in that and few of the LV's are of 300GB,150GB size.
Let me know whether using single SAN disk for this is recommended or not?(Because EVA 5000 doesnot support more than 512 vdisks and we need to migrate the data from multiple vdisks to single one due to this limitation).
If it is OK to create a VG with single 800gb disk then let me know which is the best suited PE Size for this. These filesystems would contain clearcase Vobs data and no database.OS is 11.00
I need to create a VG with 800GB Single SAN Disk. I would be creating 13 LV's in that and few of the LV's are of 300GB,150GB size.
Let me know whether using single SAN disk for this is recommended or not?(Because EVA 5000 doesnot support more than 512 vdisks and we need to migrate the data from multiple vdisks to single one due to this limitation).
If it is OK to create a VG with single 800gb disk then let me know which is the best suited PE Size for this. These filesystems would contain clearcase Vobs data and no database.OS is 11.00
2 REPLIES 2
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2006 02:16 AM
04-04-2006 02:16 AM
Re: Suggestion required on creating vg with 800gb
You can do this but almost certainly you are going to see some performance impact; not directly from the number of disks that comprise this VG but rather because of the reduced number of i/o paths. The whole idea is to get the data from the host to the array as quickly as possible and let the array decide what to do with it --- that's what them expensive arrays is good at. Rather than paring down your VG to a single LUN (vdisk), I would break the VG into as many PV as you have separate i/o paths for. Oh, and don't be fooled by the bandwidth of a Fibre controller; very seldom will you see real transfer rates approaching those values -- so the more separate i/o channels the better.
In your 800GB example, I assume that you have 4 Fibre-channel connects. Rather than 1 800GB LUN, I would create 4 200GB LUN's: LUN0 would use SCSI path A, alternate B; LUN1 would use SCSI path B, alternate C;
LUN2 would use SCSI path C, alternate D;
LUN3 would use SCSI path D, alternate A.
Now each LVOL in this VG would be stripped across all 4 LUN's typically in 64-128KB chunks. This will give you the highest possible throughput and efficiently spread the i/o.
You question about extent size is pointless. The smallest possible PE size (1MB) is still too large to spread the i/o well and 1MB PE's would severely limit the size of each PV.
In your 800GB example, I assume that you have 4 Fibre-channel connects. Rather than 1 800GB LUN, I would create 4 200GB LUN's: LUN0 would use SCSI path A, alternate B; LUN1 would use SCSI path B, alternate C;
LUN2 would use SCSI path C, alternate D;
LUN3 would use SCSI path D, alternate A.
Now each LVOL in this VG would be stripped across all 4 LUN's typically in 64-128KB chunks. This will give you the highest possible throughput and efficiently spread the i/o.
You question about extent size is pointless. The smallest possible PE size (1MB) is still too large to spread the i/o well and 1MB PE's would severely limit the size of each PV.
If it ain't broke, I can fix that.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-04-2006 02:25 AM
04-04-2006 02:25 AM
Re: Suggestion required on creating vg with 800gb
1 large 800GB LUN presented by default to 2 active FC Paths (1 Controller) or 4 200GB LUNs path preferred alternating between the 2 HSV controllers and stiped?
In my testing via IOZONE - no difference in performance. That 800GB LUN is already optimal and it's already using (or has the potential) to use the bandwidth on your FC paths... Sorry A. CLay but I too had that initial plan but the EVA5K is just so auto-everything -- nothing more that can be done to take the most out of it.
My preference (since this is an EVA5K) is to simply use that single 800GB LUN/vdisk and chop/carve it up into individual lvols (if LVM) or vols (if VxVM)...
In my testing via IOZONE - no difference in performance. That 800GB LUN is already optimal and it's already using (or has the potential) to use the bandwidth on your FC paths... Sorry A. CLay but I too had that initial plan but the EVA5K is just so auto-everything -- nothing more that can be done to take the most out of it.
My preference (since this is an EVA5K) is to simply use that single 800GB LUN/vdisk and chop/carve it up into individual lvols (if LVM) or vols (if VxVM)...
Hakuna Matata.
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
Company
Events and news
Customer resources
© Copyright 2025 Hewlett Packard Enterprise Development LP