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btrfs: how to calculate btrfs compression space savings?
Clear unused space with zeros (btrfs)Does a high “used” value for a device in “btrfs filesystem show” pose a problem? Should a balance operation be performed?Btrfs+LXC: any way to show even rough estimated free space for quota'ed subvol hosting LXC container?Btrfs - Using Flash Drive as Backup/Snapshot LocationHow to get btrfs to allocate space on new device?When does btrfs allocate space?How to set a non default zstd compression level at btrfs filesystem defragment?How to enable btrfs zstd compressioncompression with btrfs-send / btrfs-receiveHow to add a btrfs raid 1 to an encrypted lvm2 volume group under Solus OS (Linux)?
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I've enabled compression (mounted with compress=lzo) for my btrfs partition and used it for a while.
I'm curious about how much benefit the compression brought me and am interested in the saved space value (sum of all file sizes) - (actual used space).
Is there any straightforward way to get this value, or would I have to write a script that sums up e.g. df output and compres it to btrfs filesystem dfoutput?
linux btrfs
asked Aug 31 '17 at 14:23
muffelmuffel
8431918
add a comment |
I've enabled compression (mounted with compress=lzo) for my btrfs partition and used it for a while.
I'm curious about how much benefit the compression brought me and am interested in the saved space value (sum of all file sizes) - (actual used space).
Is there any straightforward way to get this value, or would I have to write a script that sums up e.g. df output and compres it to btrfs filesystem dfoutput?
linux btrfs
asked Aug 31 '17 at 14:23
muffelmuffel
8431918
add a comment |
I've enabled compression (mounted with compress=lzo) for my btrfs partition and used it for a while.
I'm curious about how much benefit the compression brought me and am interested in the saved space value (sum of all file sizes) - (actual used space).
Is there any straightforward way to get this value, or would I have to write a script that sums up e.g. df output and compres it to btrfs filesystem dfoutput?
linux btrfs
asked Aug 31 '17 at 14:23
muffelmuffel
8431918
I've enabled compression (mounted with compress=lzo) for my btrfs partition and used it for a while.
I'm curious about how much benefit the compression brought me and am interested in the saved space value (sum of all file sizes) - (actual used space).
Is there any straightforward way to get this value, or would I have to write a script that sums up e.g. df output and compres it to btrfs filesystem dfoutput?
linux btrfs
linux btrfs
asked Aug 31 '17 at 14:23
muffelmuffel
8431918
asked Aug 31 '17 at 14:23
muffelmuffel
8431918
asked Aug 31 '17 at 14:23
muffelmuffel
8431918
asked Aug 31 '17 at 14:23
muffelmuffel
8431918
asked Aug 31 '17 at 14:23
muffelmuffel
8431918
8431918
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
In ubuntu18:
apt install btrfs-compsize
compsize /mnt/btrfs-partition
output is like this:
Processed 123574 files, 1399139 regular extents (1399139 refs), 69614 inline.
Type Perc Disk Usage Uncompressed Referenced
TOTAL 73% 211G 289G 289G
none 100% 174G 174G 174G
lzo 32% 37G 115G 115G
answered Mar 27 at 10:08
Dmytro GiermanDmytro Gierman
262
add a comment |
Per the btrfs wiki, there's no built-in support for this, but the compsize tool can measure compression on btrfs.
The df output will be similar to btrfs fi df in that it will report how much disk space is used, not the uncompressed size. The wiki says you can "kind of guess" by comparing df output before and after compressing a file. Another option is using some program that will total up the actual data such as rsync --stats on a dry run, which will report how much data is read.
answered Nov 1 '17 at 21:27
foootfooot
441414
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
In ubuntu18:
apt install btrfs-compsize
compsize /mnt/btrfs-partition
output is like this:
Processed 123574 files, 1399139 regular extents (1399139 refs), 69614 inline.
Type Perc Disk Usage Uncompressed Referenced
TOTAL 73% 211G 289G 289G
none 100% 174G 174G 174G
lzo 32% 37G 115G 115G
answered Mar 27 at 10:08
Dmytro GiermanDmytro Gierman
262
add a comment |
In ubuntu18:
apt install btrfs-compsize
compsize /mnt/btrfs-partition
output is like this:
Processed 123574 files, 1399139 regular extents (1399139 refs), 69614 inline.
Type Perc Disk Usage Uncompressed Referenced
TOTAL 73% 211G 289G 289G
none 100% 174G 174G 174G
lzo 32% 37G 115G 115G
answered Mar 27 at 10:08
Dmytro GiermanDmytro Gierman
262
add a comment |
In ubuntu18:
apt install btrfs-compsize
compsize /mnt/btrfs-partition
output is like this:
Processed 123574 files, 1399139 regular extents (1399139 refs), 69614 inline.
Type Perc Disk Usage Uncompressed Referenced
TOTAL 73% 211G 289G 289G
none 100% 174G 174G 174G
lzo 32% 37G 115G 115G
answered Mar 27 at 10:08
Dmytro GiermanDmytro Gierman
262
In ubuntu18:
apt install btrfs-compsize
compsize /mnt/btrfs-partition
output is like this:
Processed 123574 files, 1399139 regular extents (1399139 refs), 69614 inline.
Type Perc Disk Usage Uncompressed Referenced
TOTAL 73% 211G 289G 289G
none 100% 174G 174G 174G
lzo 32% 37G 115G 115G
answered Mar 27 at 10:08
Dmytro GiermanDmytro Gierman
262
answered Mar 27 at 10:08
Dmytro GiermanDmytro Gierman
262
answered Mar 27 at 10:08
Dmytro GiermanDmytro Gierman
262
answered Mar 27 at 10:08
Dmytro GiermanDmytro Gierman
262
262
add a comment |
add a comment |
Per the btrfs wiki, there's no built-in support for this, but the compsize tool can measure compression on btrfs.
The df output will be similar to btrfs fi df in that it will report how much disk space is used, not the uncompressed size. The wiki says you can "kind of guess" by comparing df output before and after compressing a file. Another option is using some program that will total up the actual data such as rsync --stats on a dry run, which will report how much data is read.
answered Nov 1 '17 at 21:27
foootfooot
441414
add a comment |
Per the btrfs wiki, there's no built-in support for this, but the compsize tool can measure compression on btrfs.
The df output will be similar to btrfs fi df in that it will report how much disk space is used, not the uncompressed size. The wiki says you can "kind of guess" by comparing df output before and after compressing a file. Another option is using some program that will total up the actual data such as rsync --stats on a dry run, which will report how much data is read.
answered Nov 1 '17 at 21:27
foootfooot
441414
add a comment |
Per the btrfs wiki, there's no built-in support for this, but the compsize tool can measure compression on btrfs.
The df output will be similar to btrfs fi df in that it will report how much disk space is used, not the uncompressed size. The wiki says you can "kind of guess" by comparing df output before and after compressing a file. Another option is using some program that will total up the actual data such as rsync --stats on a dry run, which will report how much data is read.
answered Nov 1 '17 at 21:27
foootfooot
441414
Per the btrfs wiki, there's no built-in support for this, but the compsize tool can measure compression on btrfs.
The df output will be similar to btrfs fi df in that it will report how much disk space is used, not the uncompressed size. The wiki says you can "kind of guess" by comparing df output before and after compressing a file. Another option is using some program that will total up the actual data such as rsync --stats on a dry run, which will report how much data is read.
answered Nov 1 '17 at 21:27
foootfooot
441414
answered Nov 1 '17 at 21:27
foootfooot
441414
answered Nov 1 '17 at 21:27
foootfooot
441414
answered Nov 1 '17 at 21:27
foootfooot
441414
441414
add a comment |
add a comment |
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-btrfs, linux
