XenServer 7 install to Dell R730 OBR10 15TB

BRRABill

It can't be. Thin provisioning in XS is ext3 and thick is LVM. It's not that they are doing thin on ext3, it's that the terms are used interchangeably. Thin is a code name for ext3, thick is a code name for LVM. The act of mounting LVM makes it thick.

Can you explain this a little more?

I am confused in that other systems use thin provisioning. (Such as you can do in Hyper-V.)

FATeknollogee

@scottalanmiller said in XenServer 7 install to Dell R730 OBR10 15TB:

@momurda said in XenServer 7 install to Dell R730 OBR10 15TB:

Have you checked if Thin Provisioning is on? I don't think that it works with lvm SR

It can't be. Thin provisioning in XS is ext3 and thick is LVM. It's not that they are doing thin on ext3, it's that the terms are used interchangeably. Thin is a code name for ext3, thick is a code name for LVM. The act of mounting LVM makes it thick.

Makes no sense...
Why does/would the XS installer GUI even let one select Thin prov on a 14+TB SR

DustinB3403

What makes no sense is why the heck does it take forever to setup an EXT SR on XS7. . .

xe sr-create content-type=user device-config:device=/dev/disk/by-id/scsi-3614187704833f8001ed9d6ae6bb5dc14-part3 host-uuid=aa6e9fa0-ba41-421f-92fa-ec34aa73c2b5 name-label="Local Storage" shared=false type=ext

BRRABill

@FATeknollogee said in XenServer 7 install to Dell R730 OBR10 15TB:

@scottalanmiller said in XenServer 7 install to Dell R730 OBR10 15TB:

@momurda said in XenServer 7 install to Dell R730 OBR10 15TB:

Have you checked if Thin Provisioning is on? I don't think that it works with lvm SR

It can't be. Thin provisioning in XS is ext3 and thick is LVM. It's not that they are doing thin on ext3, it's that the terms are used interchangeably. Thin is a code name for ext3, thick is a code name for LVM. The act of mounting LVM makes it thick.

Makes no sense...
Why does/would the XS installer GUI even let one select Thin prov on a 14+TB SR

Yeah that is what I was saying. Dumb.

Unless we are missing something.

DustinB3403

The file system LVM doesn't support thin provisioning, simply.

EXT does however, so you'd assume that by selecting enable thing provisioning, you'd be setting the local storage to be configured for EXT.

Yet if it's over 2TB is size it doesn't mount.

That's my guess

BRRABill

LVM definitely can't be thin provisioned? I don't know myself, but Googled...

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Logical_Volume_Manager_Administration/thinprovisioned_volumes.html

DustinB3403

I'll play with my lab at some point and see if I can get this going.

FATeknollogee

Not sure why it let's you pick these options..............

DustinB3403

So the individual 8TB drives are all listed as available targets, but selecting the thin provisioning seems to do nothing.

It still configures it as LVM, and thick.

For testing, go ahead and follow through with the process, then once the install is complete run

 xe sr-list uuid=<any 8tb uuid> params=all

FATeknollogee

Will do.
I added 4x 8TB virtual drives + 1x 64GB (for o/s)

FATeknollogee

How about the message: "One SR will created that spans the selected disks"?

DustinB3403

@FATeknollogee I'm not certain, I've never presented more than a single disk to be used for the local storage.

If it create a single array across of the disks then it's doing some sort of RAID setup. Which would be bad, since you generally want your array managed by the controller

DustinB3403

Unless of course you're using software raid.

But this was previously setup inside of XS, not during installation. (there is a guide around here somewhere with software raid and XS 6.5)

FATeknollogee

That message seems to imply that XS would create some type of "span" across the 4 disks I selected.

DustinB3403

@FATeknollogee said in XenServer 7 install to Dell R730 OBR10 15TB:

That message seems to imply that XS would create some type of "span" across the 4 disks I selected.

I assume some sort of RAID setup (span is just a non-scary word for it)

BRRABill

I think it just spans it. No RAID.

FATeknollogee

@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:

So the individual 8TB drives are all listed as available targets, but selecting the thin provisioning seems to do nothing.

It still configures it as LVM, and thick.

For testing, go ahead and follow through with the process, then once the install is complete run
 xe sr-list uuid=<any 8tb uuid> params=all

Ran that cmd as root: result - "No such file or directory"

DustinB3403

@FATeknollogee You put in a proper SR uuid, correct?

FATeknollogee

@DustinB3403 My bad, I forgot to enter the UUID.
BRB

DustinB3403

@FATeknollogee said in XenServer 7 install to Dell R730 OBR10 15TB:

@DustinB3403 My bad, I forgot to enter the UUID.
BRB

You don't have remote access (or out of band access) to the host?

You can do this directly via XC and the console connection.