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Veritas.com
Support

Communication between DLO agent and DLO Dedupe Server

shamee
Level 5

‎02-04-2015 05:55 AM

Hi,

I know DLO is using source based deduplication and DLO agent will talk to dedupe server. Also the communication is happening through http://<dedupeserver_ip>:8080 and https://<dedupeserver_ip>8443  these ports.

My question is when this communication happening and how often? Also what is the load that is being created in the WAN link per PC? When this need to be checked for any bottlenecks? Please provide some info. Thanks.

Regards,

 

 

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5 REPLIES 5

VJware
Level 6
Employee Accredited Certified

‎02-04-2015 07:10 AM

When a new file is backed up the first time, it's broken into chunks and are stored into the DeDupe storage location. Then the reference pointers (metadata of small size) are stored in the NUDF. During the next backup, when the file undergoes changes, the "delta" (incremental) portion of the file are stored in the NUDF and the reference pointers (metadata) are updated.

The amount of data transfer across the network with DeDupe enabled is usually less than a regular DLO backup, so there shouldn't be any load on the network. Secondly, DLO clients do not maintain a persistent connection with the DeDupe server for any DeDupe activity. As mentioned, DeDupe activity occurs when a file is backed up.

If you are concerned about the bandwidth utilized by clients when on WAN, consider using the "Throttling" feature. This setting can be adjusted from Profile - Backup Throttling tab.

 

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shamee
Level 5

‎02-04-2015 09:55 AM

Thanks. When will DLO agent contact http://<dedupe server>:8080?

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VJware
Level 6
Employee Accredited Certified

‎02-04-2015 08:10 PM

This will occur during the start of the backup when the DLO client initializes the DeDupe Engine.

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shamee
Level 5

‎02-04-2015 10:44 PM

Hi,

Can you please provide some more details? How heavy this traffic? what is the exact function of this communication?

Regards,

 

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VJware
Level 6
Employee Accredited Certified

‎02-05-2015 12:01 AM

The traffic is minimal as port 8080 is not used for actual data transfer between the client and the storage. This is used by the DLO client to connect to the DeDupe Server for certain information which is then responded back to the client. Unfortunately, I cannot go into internal specifics of DLO components and their communication.

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