XenServer 7 install to Dell R730 OBR10 15TB
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I ran this cmd's, rebooted the host & now I'm able to create SRs
dd if=/dev/zero of=/dev/sdb bs=1M count=1024
dd if=/dev/zero of=/dev/sdc bs=1M count=1024
dd if=/dev/zero of=/dev/sdd bs=1M count=1024
dd if=/dev/zero of=/dev/sde bs=1M count=1024 -
@FATeknollogee
when you looked at the volume layout after XS was installed, did it create an ext3 volume and just fail to mount it?One thing I'm not sure if someone has successfully tried yet is if they can manually mount an ext3 volume that's larger than 2 TB into XS or if there is some sort of limit in XS that prevents it.
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Isn't 2TB the max size of ext3?
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@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
Isn't 2TB the max size of ext3?
I thought we found it's 16 TB
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@Danp said in XenServer 7 install to Dell R730 OBR10 15TB:
Does Xen support btrfs? I wonder if the upcoming release of XS with Xen 4.7 will give us more supported options.
Xen does I believe, the limitation has always been XenServer, not Xen.
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@FATeknollogee said in XenServer 7 install to Dell R730 OBR10 15TB:
How about the message: "One SR will created that spans the selected disks"?
Just using the XS GUI install (no CLI), tried another install option...
1x 80GB for o/s + 4x 400GB for VM storage with Thin prov. enabled.
This option works as advertised.
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Another install option..
Using the XS GUI install (no CLI)...SR is created & it spans the selected discs
1x 80GB for o/s + 4x 1TB for VM storage with thin prov. enabled.
This option works as advertised.
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Another install option..
Using the XS GUI install (no CLI)...SR is created & it spans the selected discs
1x 80GB for o/s + 10x 1.5TB for VM storage with thin prov. enabled.
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@Dashrender said in XenServer 7 install to Dell R730 OBR10 15TB:
@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
Isn't 2TB the max size of ext3?
I thought we found it's 16 TB
Ah, I was thinking of file size.
I think the max file size is 2TB maybe?
Which might also explain things since the VHD can't be larger than 2GB.
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@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
The file system LVM doesn't support thin provisioning, simply.
It does. lvcreate -L +5G -T does a 5 GB thin provisioned.
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@stacksofplates said in XenServer 7 install to Dell R730 OBR10 15TB:
@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
The file system LVM doesn't support thin provisioning, simply.
It does. lvcreate -L +5G -T does a 5 GB thin provisioned.
Yeah that article I posted made it seem like it was possible...
And that was kind of my line of questioning of this...that other systems (such as Hyper-V) support thin provisioning. It is a technology, not EXT.
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@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
@stacksofplates said in XenServer 7 install to Dell R730 OBR10 15TB:
@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
The file system LVM doesn't support thin provisioning, simply.
It does. lvcreate -L +5G -T does a 5 GB thin provisioned.
Yeah that article I posted made it seem like it was possible...
And that was kind of my line of questioning of this...that other systems (such as Hyper-V) support thin provisioning. It is a technology, not EXT.
Ya once you do mkfs.ext3 (that felt weird to type) it will still be thin provisioned.
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@travisdh1 said in XenServer 7 install to Dell R730 OBR10 15TB:
@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
Also wouldn't it be the smarter choice to go with EXT4 over EXT3?
EXT4 has some oddities that made some people (XenServer) not trust it completely. I'd say XFS would've been a better choice at the time, and brtfs should be the future.
Ya the only "advantage" to ext4 over xfs I could imagine is shrinking the file system and that's such a fringe scenario I don't know if it actually happens.
I mean I've done it just to try it but never for a real reason.
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@FATeknollogee said in XenServer 7 install to Dell R730 OBR10 15TB:
Another install option..
Using the XS GUI install (no CLI)...SR is created & it spans the selected discs
1x 80GB for o/s + 10x 1.5TB for VM storage with thin prov. enabled.Correct me if I'm wrong or missing something, but these three examples don't show real world examples unless you're plan is to do software RAID. But if you were doing software RAID, you'd have to install XS first with no SR, then setup the software RAID inside XS, then mount the new volume.
To replicate that, it would be interesting to see what happens when you present XS with an 80GB install volume and 1 10 TB disk, check the box for thin provisioning.
As to your examples - @scottalanmiller what tech is being used to span across the disks? Normally my non initiated Linux self would say LVM, but the XC screenshots above show the volumes as ext3
Also, I feel that you're only able to get this to work because XS is spanning over volumes that are each less than 2 TB in size. -
@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
@Dashrender said in XenServer 7 install to Dell R730 OBR10 15TB:
@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
Isn't 2TB the max size of ext3?
I thought we found it's 16 TB
Ah, I was thinking of file size.
I think the max file size is 2TB maybe?
Which might also explain things since the VHD can't be larger than 2GB.
Sure, we're aware of the VHD limitation at 2 TB (I think you just fat fingered), but that doesn't explain why XS would want the volume holding that file to also be limited to 2 TB. We still haven't had someone test trying to add a 2.1+ TB ext3 volume to XS manually. the limitation of 2 TB might only be the installer.
I know Dustin tried to use ext4 and I think that failed, but no one's tried ext3 yet.
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@Dashrender said in XenServer 7 install to Dell R730 OBR10 15TB:
@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
@Dashrender said in XenServer 7 install to Dell R730 OBR10 15TB:
@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
Isn't 2TB the max size of ext3?
I thought we found it's 16 TB
Ah, I was thinking of file size.
I think the max file size is 2TB maybe?
Which might also explain things since the VHD can't be larger than 2GB.
Sure, we're aware of the VHD limitation at 2 TB (I think you just fat fingered), but that doesn't explain why XS would want the volume holding that file to also be limited to 2 TB. We still haven't had someone test trying to add a 2.1+ TB ext3 volume to XS manually. the limitation of 2 TB might only be the installer.
I know Dustin tried to use ext4 and I think that failed, but no one's tried ext3 yet.
Actually yesterday on host1 I tried to add an ext partition, and it just sat there for a while. Not sure if it was ever going to progress I just killed it.
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Someone should post over on the XS forum.
Much like here, they already think I am a moron, so someone else can post for a chamge.
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@DustinB3403 said in XenServer 7 install to Dell R730 OBR10 15TB:
@Dashrender said in XenServer 7 install to Dell R730 OBR10 15TB:
@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
@Dashrender said in XenServer 7 install to Dell R730 OBR10 15TB:
@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
Isn't 2TB the max size of ext3?
I thought we found it's 16 TB
Ah, I was thinking of file size.
I think the max file size is 2TB maybe?
Which might also explain things since the VHD can't be larger than 2GB.
Sure, we're aware of the VHD limitation at 2 TB (I think you just fat fingered), but that doesn't explain why XS would want the volume holding that file to also be limited to 2 TB. We still haven't had someone test trying to add a 2.1+ TB ext3 volume to XS manually. the limitation of 2 TB might only be the installer.
I know Dustin tried to use ext4 and I think that failed, but no one's tried ext3 yet.
Actually yesterday on host1 I tried to add an ext partition, and it just sat there for a while. Not sure if it was ever going to progress I just killed it.
you tried ext3 and ext4?
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@Dashrender yep. Ext is the default input for the SR type, and the system selects, but I tried ext, ext3 and ext4 as the sr type.
And it just sat there. I plan to work on my lab system a bit tonight, there was a few things I wanted to test. I'll try to update everyone tomorrow.
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@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
@Dashrender said in XenServer 7 install to Dell R730 OBR10 15TB:
@BRRABill said in XenServer 7 install to Dell R730 OBR10 15TB:
Isn't 2TB the max size of ext3?
I thought we found it's 16 TB
Ah, I was thinking of file size.
I think the max file size is 2TB maybe?
Which might also explain things since the VHD can't be larger than 2GB.
Yes, 16TB FS and 2TB file.
