Networker: Twinning enabled on the Sybase database causes DD stream exhaustion

Summary: Networker Twinning enabled on the Sybase database causes DD stream to exhaust

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Symptoms

  • NetWorker backups are configured for a Sybase backup with twinning enabled.
  • DD stream rise to hundred/thousand once the twining job is spawned.
  • The primary Data Domain shows a moderate number of DD write streams with the number fluctuating up and down.
  • The Secondary Data Domain shows an excessive number of write streams. The write stream count is only increasing (it does not go down).
    • The following Data Domain commands are used on each Data Domain to determine this symptom is occurring during Sybase backups:
      • mtree list
      • ddboost storage-unit show
      • ddboost streams show active storage-unit STORAGE-UNITNAME

Where STORAGE-UNITNAME is the storage-unit where the Sybase backups are writing. 

Cause

This issue was raised to NetWorker engineering.

Resolution

This issue is addressed in the following NetWorker releases:

  • 19.12.0.3
  • 19.13.0.1

Upgrade to one of the above releases or later for a code fix.

Affected Products

NetWorker

Products

NetWorker Family, NetWorker Module, NetWorker Module for Databases and Applications
Article Properties
Article Number: 000344873
Article Type: Solution
Last Modified: 18 رجب 1447
Version:  1
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