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Re: RFC: du reports a 1.2PB file on a 1TB btrfs disk
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From: |
Jim Meyering |
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Subject: |
Re: RFC: du reports a 1.2PB file on a 1TB btrfs disk |
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Date: |
Tue, 10 Mar 2020 21:31:51 -0700 |
On Tue, Mar 10, 2020 at 12:24 PM Kaz Kylheku (Coreutils)
<address@hidden> wrote:
> On 2020-03-10 11:52, Jim Meyering wrote:
> > Otherwise, du provides no way of seeing how much of the actual disk
> > space is being used by such FS-compressed files.
>
> If you stat the file, what are the values of st_size, st_blksize and
> st_blocks?
That particular file is long gone, but I've just created a 1.8T file
on a 700G file system.
Before I began this experiment, "Avail" was 524G, so it appears to
occupy about 60G actual space.
FTR, I created the file by running this: yes $(printf '%065535d\n' 0) > big
$ stat big
File: big
Size: 1957123607586 Blocks: 3822507048 IO Block: 4096 regular file
Device: 1bh/27d Inode: 788544108 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 6405/meyering) Gid: ( 100/ users)
Access: 2020-03-10 21:01:17.710555709 -0700
Modify: 2020-03-10 21:26:05.137122240 -0700
Change: 2020-03-10 21:26:05.137122240 -0700
Birth: -
$ du -sh big; df -hT .
1.8T big
Filesystem Type Size Used Avail Use% Mounted on
/dev/vda3 btrfs 698G 221G 464G 33% /home/meyering