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Accepted
dominix
Asked: 2022-04-14 23:53:00 +0800 CST

如何显示 btrfs 快照大小

  • 772

我在一些 btrfs 卷上有很多快照，我想知道每个快照占用多少空间，所以我会知道何时以及是否有重要更改。

sudo btrfs subvolume show /home/
/
Name:           <FS_TREE>
UUID:           -
Parent UUID:        -
Received UUID:      -
Creation time:      -
Subvolume ID:       5
Generation:         1181373
Gen at creation:    0
Parent ID:      0
Top level ID:       0
Flags:          -
Snapshot(s):
            .snapshot/_0
            .snapshot/_1
            .snapshot/_2
            .snapshot/_3
            .snapshot/_4
            ...

但如果我使用du 他们报告整个空间

du -sh /home/.snapshot/*
1,2T    /home/.snapshot/_0
1,2T    /home/.snapshot/_1
1,2T    /home/.snapshot/_2

有没有办法发现空间中_1和_2之间的差异

编辑：注意：我一直在成功使用btrfs-list来简单地显示快照大小

btrfs

1 个回答

  1. Best Answer

    为了显示 BTRFS 子卷的使用数据，您必须首先启用配额，如下所示：

    sudo btrfs quota enable /home

    然后，您可以运行类似的命令sudo btrfs subvol show /home/.snapshots/your_snapshot并获取使用情况统计信息。这是一个例子：

        sudo btrfs subvol show /.snapshots/1076/snapshot/
@/.snapshots/1076/snapshot
    Name:           snapshot
    UUID:           3ba9ffa0-a355-d544-be10-1b1d0a3a321e
    Parent UUID:        5c0c4206-9b15-074f-83c3-65861366e318
    Received UUID:      -
    Creation time:      2022-02-01 00:00:09 -0800
    Subvolume ID:       1445
    Generation:         66371
    Gen at creation:    66370
    Parent ID:      275
    Top level ID:       275
    Flags:          readonly
    Send transid:       0
    Send time:      2022-02-01 00:00:09 -0800
    Receive transid:    0
    Receive time:       -
    Snapshot(s):
    Quota group:        0/1445
      Limit referenced: -
      Limit exclusive:  -
      Usage referenced: 13.92GiB
      Usage exclusive:  8.25GiB
    • 1

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