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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
CryFS - Intended to replace eCryptfs and fscrypt (which you can also look at if CryFS doesn't work for you) and add improvements. Unlike LUKS and veracrypt, you don't have to allocate the space in advance; as you add more data it just has more files containing the encrypted data. It is also intended to work with cloud sync things like Dropbox. So I expect you should also be able to store it in an NFS or samba share and then mount it so the encryption happens locally and the server never sees the unencrypted data. If you use KDE, the "vaults" program provides a good UI. Details at https://www.cryfs.org/