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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.
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rclone
"rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Azure Blob, Azure Files, Yandex Files
Syncthing: moving (renaming)
Never heard of Csync2 before. Funny enough the Csync2 Readme points to Unison, which both seem very interesting :-)
https://rclone.org works great for syncing to a huge list of cloud storage providers. I use it to keep systems in sync with a Backblaze B2 account with ZFS native encryption on the hosts and online encryption enabled for the B2 data buckets.