f2fs space usage

f2fs space usage

[Chris Ruehl]

Hi Kim,

I recently work with f2fs and wondering about the system usage.
I have a NAND flash 128MB on my SoC used for uBoot and a root
partion (f2fs)

when I install the busybox binaries I nearly run out of space
busybox binary

root@gtsir24:/mnt# du -sh /mnt/.
4.8M    /mnt/.

but df -h show a 97% usage

root@gtsir24:/mnt# df -h
Filesystem      Size  Used Avail Use% Mounted on
rootfs          3.6G  574M  2.8G  17% /
/dev/root       3.6G  574M  2.8G  17% /
devtmpfs        125M     0  125M   0% /dev
tmpfs            25M  156K   25M   1% /run
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs            50M     0   50M   0% /run/shm
/dev/mtdblock4  119M  101M  3.3M  97% /mnt

I'm running a next-20140115.

Can you comment please.
Chris

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Re: f2fs space usage

[Jaegeuk Kim]

Hi,

2014-01-23 (목), 17:32 +0800, Chris Ruehl:
> Hi Kim,
> 
> I recently work with f2fs and wondering about the system usage.
> I have a NAND flash 128MB on my SoC used for uBoot and a root
> partion (f2fs)
> 
> when I install the busybox binaries I nearly run out of space
> busybox binary
> 
> root@gtsir24:/mnt# du -sh /mnt/.
> 4.8M    /mnt/.
> 
> but df -h show a 97% usage

For such the small sized partition, the space is pretty much dependent
on the overprovision ratio.
So, if you want to get more space, you can format the partition with -o
option.

When I tested with 128MB, it seems that 20% is best, which shows 62MB
for avaliable space occupying 45% utilization.

The command is like this:

# mkfs.f2fs -o 20 $dev

Thanks,

> 
> root@gtsir24:/mnt# df -h
> Filesystem      Size  Used Avail Use% Mounted on
> rootfs          3.6G  574M  2.8G  17% /
> /dev/root       3.6G  574M  2.8G  17% /
> devtmpfs        125M     0  125M   0% /dev
> tmpfs            25M  156K   25M   1% /run
> tmpfs           5.0M     0  5.0M   0% /run/lock
> tmpfs            50M     0   50M   0% /run/shm
> /dev/mtdblock4  119M  101M  3.3M  97% /mnt
> 
> I'm running a next-20140115.
> 
> Can you comment please.
> Chris

-- 
Jaegeuk Kim
Samsung



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Re: f2fs space usage

[Chris Ruehl]

On Friday, January 24, 2014 10:12 AM, Jaegeuk Kim wrote:
> Hi,
>
> 2014-01-23 (목), 17:32 +0800, Chris Ruehl:
>> Hi Kim,
>>
>> I recently work with f2fs and wondering about the system usage.
>> I have a NAND flash 128MB on my SoC used for uBoot and a root
>> partion (f2fs)
>>
>> when I install the busybox binaries I nearly run out of space
>> busybox binary
>>
>> root@gtsir24:/mnt# du -sh /mnt/.
>> 4.8M    /mnt/.
>>
>> but df -h show a 97% usage
> For such the small sized partition, the space is pretty much dependent
> on the overprovision ratio.
> So, if you want to get more space, you can format the partition with -o
> option.
>
> When I tested with 128MB, it seems that 20% is best, which shows 62MB
> for avaliable space occupying 45% utilization.
>
> The command is like this:
>
> # mkfs.f2fs -o 20 $dev
>
> Thanks,

Yes its made the trick!
/dev/mtdblock4  119M   53M   52M  51% /mnt


Thanks a lot for your advice.
Chris
>> root@gtsir24:/mnt# df -h
>> Filesystem      Size  Used Avail Use% Mounted on
>> rootfs          3.6G  574M  2.8G  17% /
>> /dev/root       3.6G  574M  2.8G  17% /
>> devtmpfs        125M     0  125M   0% /dev
>> tmpfs            25M  156K   25M   1% /run
>> tmpfs           5.0M     0  5.0M   0% /run/lock
>> tmpfs            50M     0   50M   0% /run/shm
>> /dev/mtdblock4  119M  101M  3.3M  97% /mnt
>>
>> I'm running a next-20140115.
>>
>> Can you comment please.
>> Chris


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