为了在我的办公室备份数据，我使用运行 rsnapshot 的 Raspberry Pi 模型 B（我有一个备用的）。基本上，它每天晚上都会将数据从一堆 smb 挂载文件夹复制到几个外部硬盘驱动器 (fuseblk)。
我逐渐添加数据进行备份，最近整个过程变得非常缓慢：执行整个操作需要大约 15 小时。
这是副本的日志（仅在一个磁盘上）：
[07/Nov/2018:21:16:05] /usr/bin/rsnapshot -c /etc/rsnapshot.conf Daily: started
[07/Nov/2018:21:16:05] echo 28378 > /var/run/rsnapshot.pid
[07/Nov/2018:21:16:08] /bin/rm -rf /mnt/Disk1/Backup/Daily.4/
[07/Nov/2018:23:31:33] mv /mnt/Disk1/Backup/Daily.3/ /mnt/Disk1/Backup/Daily.4/
[07/Nov/2018:23:31:33] mv /mnt/Disk1/Backup/Daily.2/ /mnt/Disk1/Backup/Daily.3/
[07/Nov/2018:23:31:33] mv /mnt/Disk1/Backup/Daily.1/ /mnt/Disk1/Backup/Daily.2/
[07/Nov/2018:23:31:33] /bin/cp -al /mnt/Disk1/Backup/Daily.0 /mnt/Disk1/Backup/Daily.1
[08/Nov/2018:02:17:45] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld01 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:02:43:28] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld02 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:02:46:29] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld03 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:02:54:05] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld04 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:02:54:48] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld05 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:02:54:49] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld06 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:02:54:49] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld07 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:03:00:10] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld08 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:03:25:57] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld09 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:03:25:57] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld10 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:03:28:42] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld11 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:03:53:39] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld12 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:03:58:05] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld13 /mnt/Disk1/Backup/Daily.0/./
[08/Nov/2018:04:00:24] touch /mnt/Disk1/Backup/Daily.0/
[08/Nov/2018:04:00:24] rm -f /var/run/rsnapshot.pid
[08/Nov/2018:04:00:24] /usr/bin/rsnapshot -c /etc/rsnapshot.conf Daily: completed successfully
现在，我知道 RPi 不快，外部驱动器也不快。不过，问题似乎就在这里
[07/Nov/2018:21:16:08] /bin/rm -rf /mnt/Disk1/Backup/Dayly.4/
尤其是在这里
[07/Nov/2018:23:31:33] /bin/cp -al /mnt/Disk1/Backup/Dayly.0 /mnt/Disk1/Backup/Daily.1
请记住，我可能有数以万计的文件（我在写的时候数着它们，但我不知道需要多长时间）。（编辑：大约 30 GB 的空间中有 250k 个文件）
关于可能是什么问题以及我是否/如何解决它的任何想法？
当我在这里时，我对命令上的--relative[...]--no-relative选项rsync一无所知。老实说，我不记得我是如何做到的，自从我配置它以来已经有一段时间了。鉴于我需要保存树，我应该只使用relative吗？或者这样可以吗，因为它有效？
-=* 更新 *=-
我按照建议做了，并将 USB 驱动器格式化为 ext4。这是操作后的日志：
[16/Nov/2018:21:16:04] /usr/bin/rsnapshot -c /etc/rsnapshot.conf Daily: started
[16/Nov/2018:21:16:04] echo 19966 > /var/run/rsnapshot.pid
[16/Nov/2018:21:16:04] /bin/rm -rf /mnt/Disk1/Backup/Daily.4/
[16/Nov/2018:21:18:52] mv /mnt/Disk1/Backup/Daily.3/ /mnt/Disk1/Backup/Daily.4/
[16/Nov/2018:21:18:52] mv /mnt/Disk1/Backup/Daily.2/ /mnt/Disk1/Backup/Daily.3/
[16/Nov/2018:21:18:52] mv /mnt/Disk1/Backup/Daily.1/ /mnt/Disk1/Backup/Daily.2/
[16/Nov/2018:21:18:52] /bin/cp -al /mnt/Disk1/Backup/Daily.0 /mnt/Disk1/Backup/Daily.1
[16/Nov/2018:21:22:25] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld01 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:24:19] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld02 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:24:27] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld03 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:24:41] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld04 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:24:44] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld05 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:24:44] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld06 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:24:45] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld07 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:25:04] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld08 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:26:04] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld09 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:26:04] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld10 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:26:20] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld11 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:26:58] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld12 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:28:54] /usr/bin/rsync -a --stats --relative --delete --no-relative /mnt/Backup/Fld13 /mnt/Disk1/Backup/Daily.0/./
[16/Nov/2018:21:30:03] touch /mnt/Disk1/Backup/Daily.0/
[16/Nov/2018:21:30:03] rm -f /var/run/rsnapshot.pid
[16/Nov/2018:21:30:03] /usr/bin/rsnapshot -c /etc/rsnapshot.conf Daily: completed successfully
如您所见，总时间大大减少：15 分钟 vs. 7 小时。
谢谢大家，我真的很感动。
我留下的唯一疑问是评论中讨论的内容：我相信 rsync 会进行增量复制，即使它将 smb 源文件夹视为本地文件夹。其中一些文件夹包含 10k+ 个文件（可能更多，我现在无法签入），而且不可能在 2 分钟内复制所有这些文件。