Delphix Engine UI May Become Unresponsive During Storage Migration (KBA10363)

Issue

When relocating multiple terabytes of data either via block storage to object storage migration or device removal, the management interface of the Delphix Continuous Data Engine can become unresponsive for a period of time, in some cases 30 minutes or more, depending on the dataset size and workload.

The likelihood of encountering this issue increases if the storage migration/removal operation coincides with high rates of synchronous write I/O to the Delphix Engine, such as write-heavy workloads from VDBs writing to their log and data files via NFS.

I/O to and from the Delphix Engine will continue to progress in the background.

Applicable Delphix Versions

Click here to view the versions of the Delphix engine to which this article applies

Date	Release
Aug 24, 2023	14.0.0.0
Jul 24, 2023	13.0.0.0
Jun 21, 2023	12.0.0.0
May 25, 2023	11.0.0.0
Apr 13, 2023	10.0.0.0 | 10.0.0.1
Mar 13, 2023 | Mar 20, 2023	9.0.0.0 | 9.0.0.1
Feb 13, 2023	8.0.0.0
Jan 12, 2023	7.0.0.0
Releases Prior to 2023
Major Release	All Sub Releases
6.0	6.0.0.0, 6.0.1.0, 6.0.1.1, 6.0.2.0, 6.0.2.1, 6.0.3.0, 6.0.3.1, 6.0.4.0, 6.0.4.1, 6.0.4.2, 6.0.5.0, 6.0.6.0, 6.0.6.1, 6.0.7.0, 6.0.8.0, 6.0.8.1, 6.0.9.0, 6.0.10.0, 6.0.10.1, 6.0.11.0, 6.0.12.0, 6.0.12.1, 6.0.13.0, 6.0.13.1, 6.0.14.0, 6.0.15.0, 6.0.16.0, 6.0.17.0, 6.0.17.1, 6.0.17.2
5.3	5.3.0.0, 5.3.0.1, 5.3.0.2, 5.3.0.3, 5.3.1.0, 5.3.1.1, 5.3.1.2, 5.3.2.0, 5.3.3.0, 5.3.3.1, 5.3.4.0, 5.3.5.0, 5.3.6.0, 5.3.7.0, 5.3.7.1, 5.3.8.0, 5.3.8.1, 5.3.9.0
5.2	5.2.2.0, 5.2.2.1, 5.2.3.0, 5.2.4.0, 5.2.5.0, 5.2.5.1, 5.2.6.0, 5.2.6.1

Resolution

The issue is under investigation for resolution in a future Delphix version.

The data relocation and concurrent I/O workloads will continue in the background.

In the event that the engine cannot be accessed after one hour, please contact Delphix Support.

Troubleshooting

Access to the Delphix engine via the management GUI, CLI or API will be unresponsive but access to data via NFS or iSCSI from any VDBs that were already running will continue.