[DRBD-user] Offline Resize

[G C]

Correct we're adding a new physical device with larger capacity then using
pvmove to relocate to new device, etc...

The problem is that it takes a long time to complete the pvmove and it out
of space on the original device (hence the move) we wouldn't be able to use
the system until the migration was completed.


On Thu, Dec 6, 2018 at 4:35 PM Adam Goryachev <
mailinglists at websitemanagers.com.au> wrote:

> On 7/12/18 9:30 am, G C wrote:
>
> Thank you for your response.
>
> In our scenario we're limited to a single PV on the LVM and while online
> does work it takes a long time for the pvmove to complete from say 2TB to a
> 3TB PV.
>
> We're trying the offline in hopes that it would speed things up a lot.
>
> Sorry, I still don't understand. If you have a single PV, what are you
> using pvmove for?
>
> In my scenario, I use lvextend and then drbdadm resize.
>
> Or do you mean you are adding additional physical devices with larger
> capacity, and then using pvmove to relocate to the new device, and then
> using lvextend to increase the size, and then drbdadm resize? and instead
> you are planning to drbdadm down <resource> and then fiddle with the
> underlying devices, and then drbdadm up ?
>
> Is the problem that pvmove takes a long time to complete, or that it
> affects performance too much during the move? Just curious...
>
> Regards,
> Adam
>
>
>
> On Thu, Dec 6, 2018 at 4:26 PM Adam Goryachev <
> mailinglists at websitemanagers.com.au> wrote:
>
>>
>> On 7/12/18 8:54 am, G C wrote:
>>
>> Version:
>> drbd84-utils.x86_64     8.9.2-1.0.1.el7
>>
>> cat /proc/drbd
>> version: 8.4.10 (api:1/proto:86-101)
>> srcversion: 75EFA3DCEBEF5C771A0FCFC
>>
>> Following instructions located here for offline with internal metadata
>> https://docs.linbit.com/docs/users-guide-8.4/#s-resizing
>> I always get this error, I've found several issues that are similar but
>> haven't found anyway to get past this issue.
>> Architecture
>> LVM > DRBD
>>
>> # drbdadm down <resource>
>>>
>>> # drbdadm dump-md clusterdb > /tmp/metadata
>>>
>>> Found meta data is "unclean", please apply-al first
>>>
>>> Command 'drbdmeta 0 v08 /dev/drbd/clusterdb internal dump-md' terminated
>>>> with exit code 255
>>>
>>>
>>
>> Out of interest, why do you need to use offline resize? I always have
>> used the online resize with no issues (LVM underneath). Simply increase the
>> LV (on both nodes) and then issue a "drbdadm resize <resource>" command.
>>
>> Not sure if that helps, or if you have a reason for using offline resize,
>> maybe someone else can assist with that.
>>
>> PS, using 8.4.x versions.
>>
>> Regards,
>> Adam
>>
>> --
>> Adam Goryachev Website Managers www.websitemanagers.com.au
>>
>> -- The information in this e-mail is confidential and may be legally
>> privileged. It is intended solely for the addressee. Access to this e-mail
>> by anyone else is unauthorised. If you are not the intended recipient, any
>> disclosure, copying, distribution or any action taken or omitted to be
>> taken in reliance on it, is prohibited and may be unlawful. If you have
>> received this message in error, please notify us immediately. Please also
>> destroy and delete the message from your computer. Viruses - Any
>> loss/damage incurred by receiving this email is not the sender's
>> responsibility.
>> _______________________________________________
>> drbd-user mailing list
>> drbd-user at lists.linbit.com
>> http://lists.linbit.com/mailman/listinfo/drbd-user
>>
>
> --
> Adam Goryachev Website Managers www.websitemanagers.com.au
>
> -- The information in this e-mail is confidential and may be legally
> privileged. It is intended solely for the addressee. Access to this e-mail
> by anyone else is unauthorised. If you are not the intended recipient, any
> disclosure, copying, distribution or any action taken or omitted to be
> taken in reliance on it, is prohibited and may be unlawful. If you have
> received this message in error, please notify us immediately. Please also
> destroy and delete the message from your computer. Viruses - Any
> loss/damage incurred by receiving this email is not the sender's
> responsibility.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20181206/ef9f6e13/attachment.htm>