How can I do online resize from 14TB to 30TB?

How can I do online resize from 14TB to 30TB?

[寬]

I saw the mail "E2fsprogs master branch now has all 64-bit patch applied" written by Ted.  Ext4 with 64bit couldn't do online resize which is larger than 16TB, because "meta_bg" in kernel is not ready.

However, it really took lots of time to do off-line resizing.  Could I do online resize without meta_bg?  Or what can I do for e2fsprogs to support online resize for larger than 16TB?

Best regards,
Chien-kuan.



      

Re: How can I do online resize from 14TB to 30TB?

[Andreas Dilger]

On 2010-11-09, at 03:06, 寬 wrote:
> I saw the mail "E2fsprogs master branch now has all 64-bit patch applied" written by Ted.  Ext4 with 64bit couldn't do online resize which is larger than 16TB, because "meta_bg" in kernel is not ready.
> 
> However, it really took lots of time to do off-line resizing.  Could I do online resize without meta_bg?  Or what can I do for e2fsprogs to support online resize for larger than 16TB?

For the current time there will be no support for resizing a filesystem formatted < 16TB to one > 16TB.

Cheers, Andreas





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Re: How can I do online resize from 14TB to 30TB?

[Justin Maggard]

2010/11/9 Andreas Dilger <adilger.kernel@dilger.ca>:
> On 2010-11-09, at 03:06, 寬 wrote:
>> I saw the mail "E2fsprogs master branch now has all 64-bit patch applied" written by Ted.  Ext4 with 64bit couldn't do online resize which is larger than 16TB, because "meta_bg" in kernel is not ready.
>>
>> However, it really took lots of time to do off-line resizing.  Could I do online resize without meta_bg?  Or what can I do for e2fsprogs to support online resize for larger than 16TB?
>
> For the current time there will be no support for resizing a filesystem formatted < 16TB to one > 16TB.
>

On a related topic, currently 4KB-block ext4 filesystems with the
64bit flag set apparently can only expand online by a max increase of
8TB (16TB without 64bit), even if you specify a larger value with -E
resize=XXX.  Are there any plans to improve this?

Thanks,
-Justin
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