Re: btrfs-balance causes system-freeze on full disk

["Jakob Schürz" <wertstoffe@nurfuerspam.de>]

[-- Attachment #1: Type: text/plain, Size: 1328 bytes --]

Am 2015-10-27 um 18:09 schrieb Hugo Mills:
> On Tue, Oct 27, 2015 at 05:05:55PM +0100, Jakob Schürz wrote:
>> Found a new habit...
>>
>> I have a lot Snapshots on my drive. (Take every 10 Min a new one, every
>> houry one, every day one, every system-update, every plugin after
>> external HD...)
>>
>> If there are to much snapshots (didn't find out the count how much
>> exactly) balancing fails with a system-freeze.
>> if i delete some of my snapshots, balancing is working...
> 
>    The whole machine comes to a halt, or just the balancing? 

The whole machine. Even magic-sysreq-keys are not reacting... I have to
reboot my machine using the power-button...

> If you
> have lots of snapshots, balance can take *insane* amounts of time --
> my big storage array, for example, takes about 60 seconds to balance a
> data block group, and something like 4+ hours to balance some of the
> metadata block groups. While it's "stuck" like that, it is actually
> making progress, but it doesn't look like it.

I know, balancint takes a huge amount of time. So my command is:

/bin/btrfs balance start -dusage=55 -v <mountpoint>

When balancing is running, the machine reactes a little slower than
normal... but in my case, the machine is freezing. completly and
totally... :(

greez jakob




[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 473 bytes --]