# Snapshot migrate v1 to v2 **URL:** \ **Category:** Support\ **Created:** [October 12, 2021, 4:51am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669 "2021-10-12T04:51:33Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![saviodsouza](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/saviodsouza/32/50_2.png) [@saviodsouza](https://kopia.discourse.group/u/saviodsouza)\ **Post date:** [October 12, 2021, 4:51am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/1 "2021-10-12T04:51:33Z")
I just migrated a repository to v2 and would like to share some unexpected results ```auto :~# kopia snapshot migrate --policies --all --source-config=.config/kopia/kv1.config * 0 hashing, 0 hashed (0 B), 0 cached (0 B), uploaded 0 B, estimating... Migration finished. default (64KiB) - allocated 102(5) chunks freed 101 alive 1 max 5 free list high water mark: 4 :~$ :~$ rclone size /mnt/backup/kopia Total objects: 5596 Total size: 116.102 GBytes (124664020487 Bytes) :~$ rclone size /mnt/backup/kopia.v2/ Total objects: 11135 Total size: 227.851 GBytes (244652958596 Bytes) ``` 1. The size difference between repo1 and repo2, nearly double… 2. What does the the error message in red at the end of the migration mean? I did a `kopia gc run` and `kopia gc run --full` but no changes Both the repositories have Compressor: “s2-parallel-8”. ---
**Author:** ![jkowalski](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/jkowalski/32/3_2.png) [@jkowalski](https://kopia.discourse.group/u/jkowalski)\ **Post date:** [October 12, 2021, 4:53am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/2 "2021-10-12T04:53:38Z")
Can you post `kopia content stats` from both repositories? ---
**Author:** ![saviodsouza](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/saviodsouza/32/50_2.png) [@saviodsouza](https://kopia.discourse.group/u/saviodsouza)\ **Post date:** [October 12, 2021, 4:59am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/3 "2021-10-12T04:59:06Z")
# Repo v1 ```auto kopia content stats --config-file=.config/kopia/k1.conf Count: 100431 Total Bytes: 123.6 GB Average: 1.2 MB Histogram: 0 between 0 B and 10 B (total 0 B) 226 between 10 B and 100 B (total 14.4 KB) 1719 between 100 B and 1 KB (total 812.8 KB) 1623 between 1 KB and 10 KB (total 7.6 MB) 3739 between 10 KB and 100 KB (total 204.2 MB) 48927 between 100 KB and 1 MB (total 27.5 GB) 44197 between 1 MB and 10 MB (total 96 GB) 0 between 10 MB and 100 MB (total 0 B) ``` # Repo v2 ```auto kopia content stats Count: 100470 Total Bytes: 244.6 GB Average: 2.4 MB Histogram: 0 between 0 B and 10 B (total 0 B) 206 between 10 B and 100 B (total 12.9 KB) 1226 between 100 B and 1 KB (total 585.6 KB) 1037 between 1 KB and 10 KB (total 3.7 MB) 782 between 10 KB and 100 KB (total 23.3 MB) 240 between 100 KB and 1 MB (total 94.5 MB) 96979 between 1 MB and 10 MB (total 244.5 GB) 0 between 10 MB and 100 MB (total 0 B) ``` ---
**Author:** ![jkowalski](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/jkowalski/32/3_2.png) [@jkowalski](https://kopia.discourse.group/u/jkowalski)\ **Post date:** [October 12, 2021, 5:10am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/4 "2021-10-12T05:10:19Z")
Did you have compression enabled on both repositories? ---
**Author:** ![jkowalski](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/jkowalski/32/3_2.png) [@jkowalski](https://kopia.discourse.group/u/jkowalski)\ **Post date:** [October 12, 2021, 5:11am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/5 "2021-10-12T05:11:51Z")
In v2 format you should see something similar to: ```auto Count: 401633 Total Bytes: 697.4 GB Total Packed: 568.9 GB (compression 18.4%) By Method: (uncompressed) count: 160283 size: 147.9 GB pgzip-best-speed count: 241350 size: 549.5 GB packed: 421 GB compression: 23.4% Average: 1.7 MB Histogram: 0 between 0 B and 10 B (total 0 B) 6654 between 10 B and 100 B (total 472.7 KB) 107324 between 100 B and 1 KB (total 47.4 MB) 63772 between 1 KB and 10 KB (total 188.2 MB) 14666 between 10 KB and 100 KB (total 559.2 MB) 43786 between 100 KB and 1 MB (total 24 GB) 165431 between 1 MB and 10 MB (total 544 GB) 0 between 10 MB and 100 MB (total 0 B) ``` ---
**Author:** ![saviodsouza](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/saviodsouza/32/50_2.png) [@saviodsouza](https://kopia.discourse.group/u/saviodsouza)\ **Post date:** [October 12, 2021, 5:28am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/6 "2021-10-12T05:28:10Z")
yes Both the repositories have Compressor: “s2-parallel-8”. ---
**Author:** ![saviodsouza](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/saviodsouza/32/50_2.png) [@saviodsouza](https://kopia.discourse.group/u/saviodsouza)\ **Post date:** [October 12, 2021, 6:57am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/7 "2021-10-12T06:57:54Z")
yes it should have I have another repository in windows with s2-parallel-8 compression and is see the output like yours in content stats. But this repository v2 is on windows and it a fresh repository`kopia snap create ......` no migration. The Repov2 outputs I have posted here was created this way ```auto kopia policy set --global --compression=s2-parallel-8 for extensions in gns3project 7z rar zip bzip2 gz xz squashfs do kopia policy set --global --add-never-compress=$extensions done kopia snapshot migrate --policies --all --source-config=.config/kopia/kv1.config ``` If i am not wrong it appears that there is no compression happening in snapshot migrate atleat for a destination repo which has no snapshots at all… Wondering if i should recreate my v2 repository again check… ---
**Author:** ![saviodsouza](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/saviodsouza/32/50_2.png) [@saviodsouza](https://kopia.discourse.group/u/saviodsouza)\ **Post date:** [October 12, 2021, 9:51am UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/8 "2021-10-12T09:51:35Z")
OK Done my research… This time on a Windows system with same results. I just tested snapshot migrate with compression enabled on both repositories. My guess was right… > [@saviodsouza](#): > > it appears that there is no compression happening in snapshot migrate atleat for a destination repo which has no snapshots at all… Steps to Reproduce. ```auto # disconnect kopia repository disconnect export KOPIA_PASSWORD="password for kopia repository" # connect to old repository version 1 kopia repository connect filesystem --path /mnt/kv1 --config-file=k1.config export KOPIA_PASSWORD="password for kopia repository2" # create and conencto to repository version 2 kopia repository create filesystem --path /mnt/kv2 kopia repository connect filesystem --path /mnt/kv2 # setup policies for repository version 2 kopia policy set --global --compression=s2-parallel-8 for extensions in 7z rar zip bzip2 gz xz squashfs do kopia policy set --global --add-never-compress=$extensions done # Start migration kopia snapshot migrate --policies --all --source-config=$HOME/.config/kopia/k1.config #check content status of repository2 kopia content stats ``` Can this be a bug or am I still missing something… 🤔 Thanks 🙂 ---
**Author:** ![saviodsouza](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/saviodsouza/32/50_2.png) [@saviodsouza](https://kopia.discourse.group/u/saviodsouza)\ **Post date:** [October 22, 2021, 4:01pm UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/9 "2021-10-22T16:01:11Z")
@jkowalski Is this a bug? ---
**Author:** ![jkowalski](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/jkowalski/32/3_2.png) [@jkowalski](https://kopia.discourse.group/u/jkowalski)\ **Post date:** [October 22, 2021, 4:16pm UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/10 "2021-10-22T16:16:40Z")
Yes, it was just fixed yesterday. Will be in v0.9.4 release, hopefully today. > > > Hi, > > After migrating snapshots to a fresh repo, it turns out compression polic…ies were ignored. I used \`kopia snap migrate --all --policies --overwrite-policies\` in order to also copy the global policy enabling zstd-fastest, but results are identical when manually setting it beforehand and omitting \`--policies --overwrite-policies\`. Here you can see that no contents are compressed in the new repo: > > \`\`\` > $ kopia content stats > Count: 393332 > Total Bytes: 12.2 GB > Average: 31.1 KB > Histogram: > > 0 between 0 B and 10 B (total 0 B) > 14461 between 10 B and 100 B (total 0.9 MB) > 86901 between 100 B and 1 KB (total 46.1 MB) > 205343 between 1 KB and 10 KB (total 651.7 MB) > 66737 between 10 KB and 100 KB (total 2.1 GB) > 16565 between 100 KB and 1 MB (total 4.4 GB) > 3325 between 1 MB and 10 MB (total 5.1 GB) > 0 between 10 MB and 100 MB (total 0 B) > \`\`\` > > Is this a bug or am I just overlooking something here? > > Thanks & best regards > Robert ---
**Author:** ![jkowalski](https://yyz2.discourse-cdn.com/free1/user_avatar/kopia.discourse.group/jkowalski/32/3_2.png) [@jkowalski](https://kopia.discourse.group/u/jkowalski)\ **Post date:** [October 22, 2021, 4:17pm UTC](https://kopia.discourse.group/t/snapshot-migrate-v1-to-v2/669/11 "2021-10-22T16:17:21Z")
You can test it using a build from > **[Releases · kopia/kopia-test-builds](https://github.com/kopia/kopia-test-builds/releases)** > > Pre-releases for Kopia UI. Contribute to kopia/kopia-test-builds development by creating an account on GitHub.