Hi all,
I have a question born mostly out of curiosity but also slight paranoia. I don't know VMware very well so forgive me if I'm missing something obvious.
I have a VMware lun that is thin-provisioned and presented via FC. vSphere reports that the lun has no VMs in it, and yesterday I deleted the datastore from VMware. It was only mapped to one cluster. The lun is currently offline and no-one's complained (yet).
On the filer, it reports that the lun occupies 962.9gb of its 1tb. Surely it should be empty?
There are no snapshots. We don't use snapmirror. Fractional reserve was set to 100 but I've since set it to 0 and it made no difference. I haven't been here long so I don't know any more history I'm afraid.
Any ideas?
Thanks, Peta
P.S. If anyone was curious about my last email sent to this list re reallocation and de-duped volumes, I can't get a detailed answer from NetApp support aside from "generally, don't reallocate de-duped volumes". So that's what I'm doing (or not, so to speak).
You are probably looking at the "lun show -v" output.
The occupied size reported is not the current amount of data in the LUN. It is the amount of space that has ever been used by the file system on the LUN., a sort of high water mark. When data is deleted in the LUN this is not reported back to the filer. The filer does not know the difference between a block containing current data and a block that was deleted.
-- With kind regards,
Pascal Dukers ASML IT O&I D/N Datacenter/Network General Phone +31(0)402684341
-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters- bounces@teaparty.net] On Behalf Of Peta Thames Sent: Wednesday, May 30, 2012 8:00 AM To: Toasters@teaparty.net Subject: Curiosity killed the NetApp admin: Empty lun not empty
Hi all,
I have a question born mostly out of curiosity but also slight paranoia. I don't know VMware very well so forgive me if I'm missing something obvious.
I have a VMware lun that is thin-provisioned and presented via FC. vSphere reports that the lun has no VMs in it, and yesterday I deleted the datastore from VMware. It was only mapped to one cluster. The lun is currently offline and no-one's complained (yet).
On the filer, it reports that the lun occupies 962.9gb of its 1tb. Surely it should be empty?
There are no snapshots. We don't use snapmirror. Fractional reserve was set to 100 but I've since set it to 0 and it made no difference. I haven't been here long so I don't know any more history I'm afraid.
Any ideas?
Thanks, Peta
P.S. If anyone was curious about my last email sent to this list re reallocation and de-duped volumes, I can't get a detailed answer from NetApp support aside from "generally, don't reallocate de-duped volumes". So that's what I'm doing (or not, so to speak). _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
Ah of course. df on the volume reports the same thing, but presumably that's for the same reason.
Thanks, Peta
On 30 May 2012 16:40, Pascal Dukers pascal.dukers@asml.com wrote:
You are probably looking at the "lun show -v" output.
The occupied size reported is not the current amount of data in the LUN. It is the amount of space that has ever been used by the file system on the LUN., a sort of high water mark. When data is deleted in the LUN this is not reported back to the filer. The filer does not know the difference between a block containing current data and a block that was deleted.
-- With kind regards,
Pascal Dukers ASML IT O&I D/N Datacenter/Network General Phone +31(0)402684341
-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters- bounces@teaparty.net] On Behalf Of Peta Thames Sent: Wednesday, May 30, 2012 8:00 AM To: Toasters@teaparty.net Subject: Curiosity killed the NetApp admin: Empty lun not empty
Hi all,
I have a question born mostly out of curiosity but also slight paranoia. I don't know VMware very well so forgive me if I'm missing something obvious.
I have a VMware lun that is thin-provisioned and presented via FC. vSphere reports that the lun has no VMs in it, and yesterday I deleted the datastore from VMware. It was only mapped to one cluster. The lun is currently offline and no-one's complained (yet).
On the filer, it reports that the lun occupies 962.9gb of its 1tb. Surely it should be empty?
There are no snapshots. We don't use snapmirror. Fractional reserve was set to 100 but I've since set it to 0 and it made no difference. I haven't been here long so I don't know any more history I'm afraid.
Any ideas?
Thanks, Peta
P.S. If anyone was curious about my last email sent to this list re reallocation and de-duped volumes, I can't get a detailed answer from NetApp support aside from "generally, don't reallocate de-duped volumes". So that's what I'm doing (or not, so to speak). _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
-- The information contained in this communication and any attachments is confidential and may be privileged, and is for the sole use of the intended recipient(s). Any unauthorized review, use, disclosure or distribution is prohibited. Unless explicitly stated otherwise in the body of this communication or the attachment thereto (if any), the information is provided on an AS-IS basis without any express or implied warranties or liabilities. To the extent you are relying on this information, you are doing so at your own risk. If you are not the intended recipient, please notify the sender immediately by replying to this message and destroy all copies of this message and any attachments. ASML is neither liable for the proper and complete transmission of the information contained in this communication, nor for any delay in its receipt.
If you thin provision, yes.
-- With kind regards,
Pascal Dukers ASML IT O&I D/N Datacenter/Network General Phone +31(0)402684341
-----Original Message----- From: Peta Thames [mailto:petathames@gmail.com] Sent: Wednesday, May 30, 2012 8:43 AM To: Pascal Dukers Cc: Toasters@teaparty.net Subject: Re: Curiosity killed the NetApp admin: Empty lun not empty
Ah of course. df on the volume reports the same thing, but presumably that's for the same reason.
Thanks, Peta
On 30 May 2012 16:40, Pascal Dukers pascal.dukers@asml.com wrote:
You are probably looking at the "lun show -v" output.
The occupied size reported is not the current amount of data in the LUN. It is
the amount of space that has ever been used by the file system on the LUN., a sort of high water mark. When data is deleted in the LUN this is not reported back to the filer. The filer does not know the difference between a block containing current data and a block that was deleted.
-- With kind regards,
Pascal Dukers ASML IT O&I D/N Datacenter/Network General Phone +31(0)402684341
-----Original Message----- From: toasters-bounces@teaparty.net [mailto:toasters- bounces@teaparty.net] On Behalf Of Peta Thames Sent: Wednesday, May 30, 2012 8:00 AM To: Toasters@teaparty.net Subject: Curiosity killed the NetApp admin: Empty lun not empty
Hi all,
I have a question born mostly out of curiosity but also slight paranoia. I don't know VMware very well so forgive me if I'm missing something obvious.
I have a VMware lun that is thin-provisioned and presented via FC. vSphere reports that the lun has no VMs in it, and yesterday I deleted the datastore from VMware. It was only mapped to one cluster. The lun is currently offline and no-one's complained (yet).
On the filer, it reports that the lun occupies 962.9gb of its 1tb. Surely it should be empty?
There are no snapshots. We don't use snapmirror. Fractional reserve was set to 100 but I've since set it to 0 and it made no difference. I haven't been here long so I don't know any more history I'm afraid.
Any ideas?
Thanks, Peta
P.S. If anyone was curious about my last email sent to this list re reallocation and de-duped volumes, I can't get a detailed answer from NetApp support aside from "generally, don't reallocate de-duped volumes". So that's what I'm doing (or not, so to speak). _______________________________________________ Toasters mailing list Toasters@teaparty.net http://www.teaparty.net/mailman/listinfo/toasters
-- The information contained in this communication and any attachments is
confidential and may be privileged, and is for the sole use of the intended recipient(s). Any unauthorized review, use, disclosure or distribution is prohibited. Unless explicitly stated otherwise in the body of this communication or the attachment thereto (if any), the information is provided on an AS-IS basis without any express or implied warranties or liabilities. To the extent you are relying on this information, you are doing so at your own risk. If you are not the intended recipient, please notify the sender immediately by replying to this message and destroy all copies of this message and any attachments. ASML is neither liable for the proper and complete transmission of the information contained in this communication, nor for any delay in its receipt.
-
Pascal Dukers -
Peta Thames