Oracle ZFS Storage Appliance: Resumed Replication Does Not Correctly Report Bytes_Sent, Estimated_Size and Estimated_Time_Left

(Doc ID 2326695.1)

Last updated on NOVEMBER 14, 2017

Applies to:

Sun ZFS Storage 7120 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7420 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-2 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS4-4 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS5-2 - Version All Versions to All Versions [Release All Releases]
7000 Appliance OS (Fishworks)

Symptoms

One of the new features available in OS8.7.0 is Resumable Replication.

In previous versions of the code, any time an initial (or seed) replication failed, (for example, a node panics, or the network between source and target drops), all replicated data would be lost.

The replication action would have to be destroyed and a new replication action created.

With Resumable Replication, an initial replication is check pointed, allowing the replication action to pick up where it left off, should that initial replication fail.

The problem with Resumable Replication is that the tools used to measure the bytes_sent, estimated_size and estimated_time_left no longer report accurate information.

You will not know how long it will take for the seed replication to complete. 

 

Cause

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