SeaweedFS

What it is. SeaweedFS is an S3-compatible distributed object store (chart seaweedfs/seaweedfs 4.25.1, appVersion 4.25).

Why stardelt uses it. SeaweedFS provides the default object store for the lakehouse. Iceberg tables store Parquet data files in S3-compatible storage, and SeaweedFS serves that role in the platform.

How it fits. SeaweedFS runs in the data plane and is used by Trino (via S3) and Lakekeeper as the storage backend. It is the default object store; organizations can bring their own S3-compatible storage. See Services and How it works.

What you can tune. Key settings from stardelt-platform/helm-values/seaweedfs.yaml:

Setting	Values file	Key	Default	What it changes
Master replicas/resources	helm-values/seaweedfs.yaml	master.replicas, master.resources	1, requests: {cpu: "50m", memory: "128Mi"}, limits: {cpu: "1", memory: "256Mi"}	Master node configuration.
Volume PVC size/slots	helm-values/seaweedfs.yaml	volume.dataDirs[0].size, volume.dataDirs[0].maxVolumes	20Gi, 100	Volume storage size and max volume slots.
Filer resources	helm-values/seaweedfs.yaml	filer.resources	requests: {cpu: "50m", memory: "128Mi"}, limits: {cpu: "1", memory: "512Mi"}	Filer resources.
S3 enabled/auth	helm-values/seaweedfs.yaml	s3.enabled, s3.enableAuth	true, true	Enables S3 API with authentication.
S3 port/buckets	helm-values/seaweedfs.yaml	s3.port, s3.createBuckets	8333, [{"name": "lakehouse", "anonymousRead": false}, {"name": "backups", "anonymousRead": false}]	S3 endpoint port and buckets created by the chart.
Admin UI	helm-values/seaweedfs.yaml	admin.enabled	true	Enables the cluster-internal SeaweedFS admin UI.

What it replaces. SeaweedFS replaces HDFS as the default object store for this platform.

Operating it.

• Health check: Check SeaweedFS pods in the cluster (e.g. kubectl -n stardelt get pods -l app.kubernetes.io/name=seaweedfs).
• Logs: View logs by component (master/volume/filer/s3) with kubectl -n stardelt logs -l app.kubernetes.io/name=seaweedfs.
• Install step: make step-storage (see stardelt-platform/Makefile) installs SeaweedFS and creates buckets.
• Buckets: The notebooks bucket is created by stardelt-platform/scripts/create-notebooks-bucket.sh (versioned). The backup bucket is created by stardelt-platform/scripts/create-backup-bucket.sh.
• Backup: Object store data is archived by manifests/object-store-backup.yaml (daily aws s3 sync to lakehouse-backup). See Backups.
• Admin UI: Cluster-internal admin UI is available (see helm-values/seaweedfs.yaml); access via make seaweedfs-admin.