On 12-02-25 09:10 PM, Fahrzin Hemmati wrote: > btrfs is horrible for small filesystems (like a 5GB drive). df -h says > you have 967MB available, but btrfs (at least by default) allocates 1GB > at a time to data/metadata. This means that your 10MB file is too big > for the current allocation and requires a new data chunk, or another > 1GB, which you don't have.
So increasing the size of the filesystem should suffice then? How much
bigger? 10G? Nope. still not big enough:
# lvextend -L+1G /dev/rootvol/mint_usr; btrfs fi resize max /usr; df -h /usr
Extending logical volume mint_usr to 10.00 GiB
Logical volume mint_usr successfully resized
Resize '/usr' of 'max'
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvol-mint_usr
10G 2.8G 6.0G 32% /usr
test ~ # apt-get install -y -f
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
linux-headers-3.0.0-16-generic
The following NEW packages will be installed:
linux-headers-3.0.0-16-generic
0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded.
264 not fully installed or removed.
Need to get 0 B/851 kB of archives.
After this operation, 10.8 MB of additional disk space will be used.
(Reading database ... 180246 files and directories currently installed.)
Unpacking linux-headers-3.0.0-16-generic (from
.../linux-headers-3.0.0-16-generic_3.0.0-16.28_i386.deb) ...
dpkg: error processing
/var/cache/apt/archives/linux-headers-3.0.0-16-generic_3.0.0-16.28_i386.deb
(--unpack):
unable to install new version of
`/usr/src/linux-headers-3.0.0-16-generic/include/config/dvb/usb.h': No space
left on device
20G maybe? Nope:
# lvextend -L20G /dev/rootvol/mint_usr; btrfs fi resize max /usr; df -h /usr
Extending logical volume mint_usr to 20.00 GiB
Logical volume mint_usr successfully resized
Resize '/usr' of 'max'
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvol-mint_usr
20G 2.8G 16G 15% /usr
test ~ # apt-get install -y -f
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
linux-headers-3.0.0-16-generic
The following NEW packages will be installed:
linux-headers-3.0.0-16-generic
0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded.
264 not fully installed or removed.
Need to get 0 B/851 kB of archives.
After this operation, 10.8 MB of additional disk space will be used.
(Reading database ... 180246 files and directories currently installed.)
Unpacking linux-headers-3.0.0-16-generic (from
.../linux-headers-3.0.0-16-generic_3.0.0-16.28_i386.deb) ...
dpkg: error processing
/var/cache/apt/archives/linux-headers-3.0.0-16-generic_3.0.0-16.28_i386.deb
(--unpack):
unable to install new version of
`/usr/src/linux-headers-3.0.0-16-generic/include/config/ncpfs/packet/signing.h':
No space left on device
Maybe 50G? Yup:
# apt-get install -y -f
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
linux-headers-3.0.0-16-generic
The following NEW packages will be installed:
linux-headers-3.0.0-16-generic
0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded.
264 not fully installed or removed.
Need to get 0 B/851 kB of archives.
After this operation, 10.8 MB of additional disk space will be used.
(Reading database ... 180246 files and directories currently installed.)
Unpacking linux-headers-3.0.0-16-generic (from
.../linux-headers-3.0.0-16-generic_3.0.0-16.28_i386.deb) ...
Setting up linux-image-3.0.0-16-generic (3.0.0-16.28) ...
...
# df -h /usr
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvol-mint_usr
50G 2.8G 43G 7% /usr
So I guess I need a 50G btrfs filesystem for 2.8G worth of data?
Does that really seem right? I suppose to be fair it could have been
some other value between 20G and 50G since I didn't test values in
between. So still, I need some amount more than 20G of space to store
2.8G of data?
Surely there is something going on here other than just btrfs sucks for
small filesystems.
b.
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