为什么我的 zfs 快照 (165 Gb) 中的已用空间总和不等于 usedsnap 值 (2.93 Tb)？

问题描述

我的主分区有 2.93 Tb 供快照使用：

root@ncloud:~# zfs list -o space bionic-rpool/home/nickc
NAME                     AVAIL   USED  USEDSNAP  USEDDS  USEDREFRESERV  USEDCHILD
bionic-rpool/home/nickc  1.42T  6.98T     2.93T   4.04T             0B         0B

但是，所有快照的完整列表给出的总使用量仅为 165 Gb：

root@ncloud:~# zfs list -t snap -o space | grep home/nickc | awk '{print $3}' | numfmt --from=iec | awk '{sum += $1} END {print sum}' | numfmt --to=iec
165G

我正在按照 root-on-zfs 说明运行 Ubuntu 18.04 here：

以下是快照的完整列表：

root@ncloud:~# echo "NAME                                                                USED  AVAIL  REFER  MOUNTPOINT"; zfs list -t snap | grep home/nickc | sort -k 2,2h 
NAME                                                                USED  AVAIL  REFER  MOUNTPOINT
bionic-rpool/home/nickc@zfs-auto-snap_daily-2021-01-08-0005         704K      -  6.23T  -
bionic-rpool/home/nickc@zfs-auto-snap_weekly-2021-01-08-0010        716K      -  6.23T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-1317        816K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0017        840K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_frequent-2021-01-12-1115      844K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-1617        844K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-1117        848K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-2217        852K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-1417        856K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-1017        856K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_frequent-2021-01-12-1045      860K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_daily-2021-01-12-0008         864K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-1917        864K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0117        864K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-1517        868K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0717        868K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0317        876K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0617        876K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0917        876K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_frequent-2021-01-12-1030      880K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0417        904K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-1717        908K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-2117        908K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0217        908K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_frequent-2021-01-12-1100      916K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0817        916K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-2317        920K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-1817        924K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-2017        936K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-11-1217        944K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_hourly-2021-01-12-0517        944K      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_daily-2021-01-11-0007        1.47M      -  4.04T  -
bionic-rpool/home/nickc@zfs-auto-snap_daily-2021-01-09-0005        1.77M      -  6.23T  -
bionic-rpool/home/nickc@zfs-auto-snap_daily-2021-01-06-0008        2.20M      -  6.23T  -
bionic-rpool/home/nickc@zfs-auto-snap_weekly-2020-12-25-0014       5.84M      -  6.03T  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-06-22-2318      6.35M      -  3.98T  -
bionic-rpool/home/nickc@zfs-auto-snap_daily-2021-01-07-0008        6.83M      -  6.23T  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-07-22-2318      9.16M      -  3.98T  -
bionic-rpool/home/nickc@zfs-auto-snap_daily-2021-01-10-0006        10.0M      -  6.24T  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-03-25-0019      16.7M      -  34.1G  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-08-22-2318      22.5M      -  3.99T  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-10-21-2316      23.5M      -  4.39T  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-11-21-0018      24.7M      -  4.42T  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-02-25-0018      28.7M      -  24.6G  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-09-21-2316      37.5M      -  3.96T  -
bionic-rpool/home/nickc@zfs-auto-snap_weekly-2021-01-01-0010        380M      -  6.23T  -
bionic-rpool/home/nickc@zfs-auto-snap_weekly-2020-12-18-0011        382M      -  4.44T  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-01-27-0017      13.3G      -  16.0G  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-12-21-0019      63.3G      -  4.50T  -
bionic-rpool/home/nickc@zfs-auto-snap_monthly-2020-05-23-2318      87.3G      -  3.85T  -

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）