Difference between blob storage on disk versus UI

Sonatype Nexus Repository
1

I have a Nexus 3.29 instance with only one blob store (named default). A blob compaction was performed successfully. After this, the admin interface shows space used as 1225GB. However, on disk, the blob uses 1.6TB (measured using both “du -bs” and “du -hs”). I also looked up files with “deleted=true” set in the properties file. They only total about 750KB, likely created happened after the compaction finished.

How is the space used number calculated in the UI?

2

Its calculated by the size of the files, not the size on disk. Recall that file systems have overhead and use blocks.

3

Thanks Matthhew. To work around block size, I had tried “du -bs” for byte count and that returned 1.6TB as well. Anyway, this is a bit pointless I think. Setting up clean up policy for snapshots should help.