Skip to content

Symlinks get Supercharged

When we started using symlinks for real-debrid content, the natural place to store them was in /storage/elfstorage, since all users get 100GB free, so it's a consistent location. As we've increased in users, and users have increased their libraries sizes, I realized that this may be an inefficient way of "storing" the symlinks.

ElfStorage is backed by HDDs, and is using Ceph's erasure coding at a profile of 8:2, meaning every object gets split into 8 checks, and distributed across our 10 ElfStorage "dwarf" nodes (2 coding chunks). This is great for 80GB movies (10GB per node!), but probably not great for tiny little symlinks, since it represents a lot of extra work for the ceph cluster!

To this end, I've added a /storage/symlinks folder for each user. Unlike /storage/elfstorage, this is backed by NVMes on our 10Gbit nodes, in a simple 2-replica configuration, so the actual load on the cluster resulting from storage to /storage/symlinks should be negligible.

Your old symlinks in /storage/elfstorage will continue to work, but ElfBot will new create all new symlinks into /storage/symlinks. Apps default configs will be updated for fresh installs, but you'll want to update your Radarr / Sonarr root folders if you use them as part of your symlink setup.

ElfBot reports on broken symlinks

Many users with large Real-Debrid collections have been noticing that their content occasionally "goes away". The symlinks remain, but the original sources in /storage/realdebrid-zurg/__all__ (for example) are removed. We're not sure exactly why this happens to some content and not others, but to make it easier to manage, ElfBot can now generate you a report of all broken symlinks.

To get your report, run elfbot symlink report-broken, and find the resulting report in /storage/symlinks/report-broken.txt.

Deleting broken symlinks

It's not implemented yet (some apps legitimately use symlinks which appear to be broken upon scanning), but we could also allow ElfBot to automatically delete broken symlinks. Watch this space!

Today's scoreboard

Metric Numberz Delta
Total subscribers 316 +43
Storageboxes mounted 18 +1
๐Ÿ‘ฝ Zurg mounts: 129 +21
๐Ÿ’พ ElfStorage in TBs 62 +5
Tenant pods 4059 +402
๐Ÿฆธ Elf-vengers 4 -
๐Ÿง‘โ€๐ŸŽ“ Trainees 2 -
Bugz squished 1 -
New toyz 1 -


Thanks for geeking out with us, and please share these posts with related geeks!