XenServer 7 install to Dell R730 OBR10 15TB
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@momurda Yep, you're right it is Thick provisioned.
for anyone wondering the command to check your SR.
xe sr-list uuid=<SR UUID> params=all
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@FATeknollogee said in XenServer 7 install to Dell R730 OBR10 15TB:
@DustinB3403 said in XenServer 7 install to Dell R720 OBR10 15TB:
I created this storage as LVM, and it set it to LVM2.
I didn't try to create the storage as EXT3.
In your case, what's the advantage of LVM2 vs LVM?
There is no LVM on Linux. LVM2 is all that there has been for a very long time. LVM is the name of the family and category, like this...
Does Linux have an LVM? Yes
What is the name of Linux' LVM layer? LVM
What is the version of LVM on Linux? LVM2 -
@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.
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@scottalanmiller So should I destroy this SR and try to create it as EXT3? and if I do can I migrate a thick provision vm over to a thin provisioned host?
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@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
@scottalanmiller So should I destroy this SR and try to create it as EXT3? and if I do can I migrate a thick provision vm over to a thin provisioned host?
Migration should be fine, but I've not done it. Should you be ext3? That's up to you
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@scottalanmiller said in XenServer 7 install to Dell R730 OBR10 15TB:
@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
@scottalanmiller So should I destroy this SR and try to create it as EXT3? and if I do can I migrate a thick provision vm over to a thin provisioned host?
Migration should be fine, but I've not done it. Should you be ext3? That's up to you
There's obviously not much choice if one desires Thin prov.?
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@scottalanmiller said in XenServer 7 install to Dell R730 OBR10 15TB:
@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
@scottalanmiller So should I destroy this SR and try to create it as EXT3? and if I do can I migrate a thick provision vm over to a thin provisioned host?
Migration should be fine, but I've not done it. Should you be ext3? That's up to you
My question is converting the storage to thin going to break my VM's if I import them from a Thick provisioned system...
If you don't have the answer, just say so.
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Also wouldn't it be the smarter choice to go with EXT4 over EXT3?
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@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
@scottalanmiller said in XenServer 7 install to Dell R730 OBR10 15TB:
@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
@scottalanmiller So should I destroy this SR and try to create it as EXT3? and if I do can I migrate a thick provision vm over to a thin provisioned host?
Migration should be fine, but I've not done it. Should you be ext3? That's up to you
My question is converting the storage to thin going to break my VM's if I import them from a Thick provisioned system...
If you don't have the answer, just say so.
Don't quote me on this but I believe your VM's would be fine. Thin provisioning is just the way the virtual disk is created and expands as the internal data grows. If you migrate a VM that was created with thick provisioning, it would just stay in that state of using all the disk space you assigned to it.
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@DustinB3403 - You could always image the systems instead of migrating. But I guess that depends on if you can allow for down time.
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@syko24 said in XenServer 7 install to Dell R730 OBR10 15TB:
@DustinB3403 - You could always image the systems instead of migrating. But I guess that depends on if you can allow for down time.
No down time, ever!
Is the mantra here, even though its not warranted.
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@scottalanmiller said
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.)
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@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 -
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 -
@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 SRYeah that is what I was saying. Dumb.
Unless we are missing something.
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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
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LVM definitely can't be thin provisioned? I don't know myself, but Googled...
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I'll play with my lab at some point and see if I can get this going.
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Not sure why it let's you pick these options..............
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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
