Re: Online resizing of LUN's

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On Fri, 22 Jun 2012 10:33:47 +0200
RedShift <redshift@xxxxxxxxxx> wrote:

> On 06/22/2012 10:10 AM, RedShift wrote:
>> On 06/22/2012 09:56 AM, FUJITA Tomonori wrote:
>>> On Fri, 22 Jun 2012 08:32:16 +0200
>>> RedShift<redshift@xxxxxxxxxx> wrote:
>>>
>>>> On 06/18/2012 03:21 PM, FUJITA Tomonori wrote:
>>>>> On Mon, 18 Jun 2012 15:12:37 +0200 (CEST)
>>>>> RedShift<redshift@xxxxxxxxxx> wrote:
>>>>>
>>>>>> So the patch in the email posted above should work? Will try that
>>>>>> ASAP.
>>>>>
>>>>> Not sure. Too many changes since then. The following patch can be
>>>>> applied to the current git head. But not sure if it works.
>>>>> *snip*
>>>>
>>>>
>>>> It doesn't work.
>>>>
>>>> I use an LVM logical volume as backing-store to my iSCSI target. I
>>>> started tgtd, connected my initiator and then proceeded with resizing
>>>> my logical volume by adding 5 GB. Next, I rescanned the disks from
>>>> disk management (I'm using Windows as initiator), however, no size
>>>> changed occured nor does tgtd say so.
>>>>
>>>> I ran tgtd -f -d 1, and it says
>>>>
>>>> # tgtd -d 1 -f
>>>> tgtd: setup_inotify(320) inotify ready, 0
>>>>
>>>>
>>>> But it never mentions "%s changed"
>>>>
>>>>*snip*
> 
> Well I found it why it doesn't say %s changed and will never say that,
> inotify doesn't support block devices. Couldn't we implement a command

Hmm, is there something that can work for block devices? I thought
that some tools can catch the size changes of a block device...


> in tgtadm that notifies tgtd it should re-read the sizes of its
> backing stores?

We could. I can't recall, but we have the feature to reload a file via
tgtadm?
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