Not quite ;) S3 is the primary data and metadata store, so that the rest of the stack is a pure function of S3 data (including Elastic). We don't use git at all yet. We use S3 object versioning and then capture the version, SHA-256, etag, etc. in a JSONL-based manifest https://open.quiltdata.com/b/quilt-example/tree/.quilt/packa.... Said JSONL manifest is simply a "locked list" of all the S3 objects in that package. The same manifests can be checked into git for fork/merge of data sets, but we're still exploring the right way to do that.

I'll let Kevin answer the database fragments question.