Re: how to run balance successfully (No space left on device)?

On 10.11.2017 22:51 Chris Murphy wrote: >> Combined with evidence that "No space left on device" during balance can >> lead to various file corruption (we've witnessed it with MySQL), I'd day >> btrfs balance is a dangerous operation and decision to use it should be >> considered very thoroughly.

Re: how to run balance successfully (No space left on device)?

On Fri, Nov 10, 2017 at 12:42 AM, Tomasz Chmielewski wrote: > On 2017-11-07 23:49, E V wrote: > >> Hmm, I used to see these phantom no space issues quite a bit on older >> 4.x kernels, and haven't seen them since switching to space_cache=v2. >> So it could be space cache

Re: how to run balance successfully (No space left on device)?

On 2017-11-07 23:49, E V wrote: Hmm, I used to see these phantom no space issues quite a bit on older 4.x kernels, and haven't seen them since switching to space_cache=v2. So it could be space cache corruption. You might try either clearing you space cache, or mounting with nospace_cache, or

Re: how to run balance successfully (No space left on device)?

On 2017-10-31 23:18, Tomasz Chmielewski wrote: On 2017-09-18 17:20, Tomasz Chmielewski wrote: # df -h /var/lib/lxd FWIW, standard (aka util-linux) df is effectively useless in a situation such as this, as it really doesn't give you the information you need (it can say you have lots of space

Re: how to run balance successfully (No space left on device)?

On 2017-10-31 23:18, Tomasz Chmielewski wrote: On a different server, however, it failed badly: # time btrfs balance start /srv WARNING: Full balance without filters requested. This operation is very intense and takes potentially very long. It is recommended to use the

Re: how to run balance successfully (No space left on device)?

On 2017-09-18 17:20, Tomasz Chmielewski wrote: # df -h /var/lib/lxd FWIW, standard (aka util-linux) df is effectively useless in a situation such as this, as it really doesn't give you the information you need (it can say you have lots of space available, but if btrfs has all of it allocated

Re: how to run balance successfully (No space left on device)?

Tomasz Chmielewski posted on Mon, 18 Sep 2017 18:27:09 +0900 as excerpted: > And perhaps more important - can I assume that right now, with the > latest stable kernel (4.13.2 right now), running "btrfs balance" is not > safe and can lead to data corruption or loss? > > > Consider the following

Re: how to run balance successfully (No space left on device)?

On 2017-09-18 22:44, Peter Becker wrote: i'm not sure if it would help, but maybe you could try adding an 8GB (or more) USB flash drive to the pool and try to start balance. if it works out, you can throw him out of the pool after that. I really can't, it's an "online server". But I've

Re: how to run balance successfully (No space left on device)?

i'm not sure if it would help, but maybe you could try adding an 8GB (or more) USB flash drive to the pool and try to start balance. if it works out, you can throw him out of the pool after that. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to

Re: how to run balance successfully (No space left on device)?

On 2017-09-18 17:29, Andrei Borzenkov wrote: On Mon, Sep 18, 2017 at 11:20 AM, Tomasz Chmielewski wrote: # df -h /var/lib/lxd FWIW, standard (aka util-linux) df is effectively useless in a situation such as this, as it really doesn't give you the information you need (it

Re: how to run balance successfully (No space left on device)?

On Mon, Sep 18, 2017 at 11:20 AM, Tomasz Chmielewski wrote: >>> # df -h /var/lib/lxd >>> >>> FWIW, standard (aka util-linux) df is effectively useless in a situation >>> such as this, as it really doesn't give you the information you need (it >>> can say you have lots of space

Re: how to run balance successfully (No space left on device)?

# df -h /var/lib/lxd FWIW, standard (aka util-linux) df is effectively useless in a situation such as this, as it really doesn't give you the information you need (it can say you have lots of space available, but if btrfs has all of it allocated into chunks, even if the chunks have space in

Re: how to run balance successfully (No space left on device)?

Tomasz Chmielewski posted on Mon, 18 Sep 2017 00:02:46 +0900 as excerpted: > I'm trying to run balance on a 4.13.2 kernel without much luck: > > # time btrfs balance start -v /var/lib/lxd -dusage=5 -musage=5 > [works, but only 1 chunk balanced] > # time btrfs balance start -v /var/lib/lxd