# Two comparable backups, huge duration differences

**URL:** https://forum.duplicati.com/t/two-comparable-backups-huge-duration-differences/5366
**Category:** Support
**Created:** [November 21, 2018, 4:16pm UTC](https://forum.duplicati.com/t/two-comparable-backups-huge-duration-differences/5366 "2018-11-21T16:16:09Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![ts678](https://forum.duplicati.com/letter_avatar_proxy/v4/letter/t/8491ac/32.png) [@ts678](https://forum.duplicati.com/u/ts678)
#### Post date: [November 22, 2018, 2:11am UTC](https://forum.duplicati.com/t/two-comparable-backups-huge-duration-differences/5366/2 "2018-11-22T02:11:20Z")

</div>

> [@anon8404338](#):
>
> the quick one has a lot more ‘changed data’

Did you mean to say the **slow** one has a lot more? Regardless, I think there’s no verbosity that gives per-file information on changed data, however there is a way to see what files are being added, deleted, or changed.

[The COMPARE command](https://duplicati.readthedocs.io/en/latest/04-using-duplicati-from-the-command-line/#the-compare-command)

Sample output:

```
Listing changes
  1: 11/20/2018 8:41:59 AM
  0: 11/21/2018 10:02:18 AM

Size of backup 1: 343.77 MB

  1 added entries:
  + C:\Users\Ted\AppData\Roaming\Mozilla\Firefox\Profiles\rsbrp398.default-1528892271354\bookmarkbackups\bookmarks-2018-11-21_1422_1kdKfrSWi29YPJOva1+VJg==.jsonlz4

  5 modified entries:
  ~ C:\Users\Ted\AppData\Roaming\Mozilla\Firefox\Profiles\rsbrp398.default-1528892271354\bookmarkbackups\
  ~ C:\Users\Ted\AppData\Roaming\Mozilla\Firefox\Profiles\rsbrp398.default-1528892271354\sessionstore-backups\
  ~ C:\Users\Ted\AppData\Roaming\Mozilla\Firefox\Profiles\rsbrp398.default-1528892271354\sessionstore-backups\previous.jsonlz4
  ~ C:\Users\Ted\AppData\Roaming\Mozilla\Firefox\Profiles\rsbrp398.default-1528892271354\sessionstore-backups\recovery.baklz4
  ~ C:\Users\Ted\AppData\Roaming\Mozilla\Firefox\Profiles\rsbrp398.default-1528892271354\sessionstore-backups\recovery.jsonlz4

1 deleted entries:
  - C:\Users\Ted\AppData\Roaming\Mozilla\Firefox\Profiles\rsbrp398.default-1528892271354\bookmarkbackups\bookmarks-2018-11-20_1422_1kdKfrSWi29YPJOva1+VJg==.jsonlz4

  Added files: 1
  Deleted files: 1
  Modified folders: 2
  Modified files: 3
Size of backup 0: 343.67 MB

```

and then you must guess which files were the offenders in making a big upload. Note that the [backup](https://duplicati.readthedocs.io/en/latest/01-introduction/#the-backup-process-explained) is on a file-block basis, and only changed blocks are uploaded. Unchanged blocks from old backups are referenced.

EDIT: A nicer web-UI-Commandline version from @kees-z (thanks!) of running a `compare` just went up [here](https://forum.duplicati.com/t/feature-request-list-all-backup-sets-with-their-size/5257/6), for someone wanting basically the same thing (or at least giving them something that comes kind of close…).

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