BUG REPORT: At higher bandwidths, limiting bandwidth may result in decreased backup performance.

Article:TECH67432  |  Created: 2009-01-02  |  Updated: 2010-01-11  |  Article URL http://www.symantec.com/docs/TECH67432
Article Type
Technical Solution

Product(s)

Environment

Issue



BUG REPORT: At higher bandwidths, limiting bandwidth may result in decreased backup performance.

Solution



Overview:
In PureDisk Remote Office Edition, specifying a value higher than 5 MB/s as a bandwidth limitation may result in decreased backup performance.  For example, setting a bandwidth limitation in the replication policy is affected by this.


Conditions:
Currently, bandwidth limitation (also known as bandwidth throttling) may only be accurate across low bandwidth connections.  When specifying a value higher than 5 MB/s as a limitation, the discrepancy may increase the higher this value is set.  The value above 5MB/s at which this issue begins to take effect depends on the network and available bandwidth.  If an environment is affected by this issue, then not specifying a value for bandwidth limitation will prevent performance from decreasing due to this issue.  This also would have an affect on PDDO replication in latter versions of PureDisk.


Resolution:
Symantec has acknowledged that the above-mentioned issue (Etrack 1458228) is present in the current version(s) of the product(s) mentioned at the end of this article. Symantec Corporation is committed to product quality and satisfied customers. This issue is currently being considered by Symantec Corporation to be addressed in a forthcoming Release Update of the product.

As future updates are released, please visit the following link for download and readme information:
 http://www.symantec.com/business/support/downloads.jsp?pid=52672




Supplemental Materials

SourceETrack
Value1458228
DescriptionETrack (NetBackup) 1458228: Transfer Speed decreasing by setting the bandwidth parameter for replication.


Legacy ID



318482


Article URL http://www.symantec.com/docs/TECH67432


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