Re: device balance times

[Arnaud Kapp <kapp.arno@gmail.com>]

Hello,

I would like to ask if the balance time is related to the number of 
snapshot or if this is related only to data (or both).

I currently have about 4TB of data and around 5k snapshots. I'm thinking 
of going raid1 instead of single. From the numbers I see this seems 
totally impossible as it would take *way* too long.

Would destroying snapshots (those are hourly snapshots to prevent stupid 
error to happens, like `rm my_important_file`) help?

Should I reconsider moving to raid1 because of the time it would take?

Sorry if I'm somehow hijacking this thread, but it seemed related :)

Thanks,

On 10/21/2014 10:14 PM, Piotr Pawłow wrote:
> On 21.10.2014 20:59, Tomasz Chmielewski wrote:
>> FYI - after a failed disk and replacing it I've run a balance; it took
>> almost 3 weeks to complete, for 120 GBs of data:
>
> Looks normal to me. Last time I started a balance after adding 6th
> device to my FS, it took 4 days to move 25GBs of data. Some chunks took
> 20 hours to move. I currently have 156 snapshots on this FS (nightly
> rsync backups).
>
> I think it is so slow, because it's disassembling chunks piece by piece
> and stuffing these pieces elsewhere, instead of moving chunks as a
> whole. If you have a lot of little pieces (as I do), it will take a
> while...
>
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