Limitations in 5.0.0

Tip
For limitations of features introduced in VAST Cluster 5.0, see the feature description in New Features.

Install & Upgrade

ORION-158830: When upgrading from VAST Cluster 4.7.0-SP10 and 4.7.0-SP12 to VAST Cluster 5.0.0, you have to manually configure CNode CPU isolation settings (isolcpus).

Quotas

ORION-208873: Quotas and quota accounting are not supported on subpaths of a replicated protected path on the destination peer. For example, if a protected path is replicated to a destination directory /dest-dir, you cannot set a quota on /dest-dir/mydir.

Quality of Service

ORION-148295: QoS should be enabled on all views to avoid performance degradation issues.
ORION-148206: There may be some scenarios in which minimum service levels set by QoS policies are not met.
ORION-139524: Setting a minimum limit for read operations does not limit write operations on the same view.

NFS

ORION-115336: If one creates an NFSv4.1-only view and mount it, and then creates its parent view with NFSv3 only, IO operations on the NFSv4.1-only view succeed but mounts are not allowed.

VAST Catalog

The maximum path length supported by VAST Catalog is 1024 characters.

Global Snapshot Clones

VAST Cluster 5.0 does not support global snapshot clones with VAST Catalog enabled.

VAST Prometheus Exporter

With VAST Cluster 5.0 and 4.7, the Prometheus exporter script at https://github.com/vast-data/vast-exporter is no longer supported. Instead, use the following the VAST API endpoints:

https://<VMS IP>/api/prometheusmetrics/
https://<VMS IP>/api/prometheusmetrics/all
https://<VMS IP>/api/prometheusmetrics/users
https://<VMS IP>/api/prometheusmetrics/defrag
https://<VMS IP>/api/prometheusmetrics/views
https://<VMS IP>/api/prometheusmetrics/devices
https://<VMS IP>/api/prometheusmetrics/quotas

Authentication & Authorization

ORION-141763: Before enabling or disabling NTLM authentication, you need to leave the cluster's joined Active Directory domain. After NTLM authentication is enabled or disabled, rejoin the domain.

Call Home & Support

When creating a support bundle with the METADATA preset, only one CNode can be selected for the bundle. Selecting any DNode(s) or multiple CNodes together with the METADATA preset results in an error.