BUE2010 not using iSCSI network to backup in spite of SSO is enabled

[baggiotto]

Environment:
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BUE2010 updated

SSO enabled (no CASO)

DELL TL2000 with 2 LTO4 drives and iSCSI bridge installed

Primary SSO Server: Win2k3 R2 Standard x86 edition

Secondary SSO Server: Win Storage Server 2008 Standard SP1 x64

iSCSI SAN environment

Problem:

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Jobs configured to run in the secondary server are using corporative LAN to send data to primary server write it in a tape. We can see that behavior monitoring interfaces: secondary server has 4 iSCSI SAN interfaces that are using about 1GBit/sec and one corporative LAN interface that uses 4GBit/sec during backup jobs. This way, it seems that all data captured from storage SAN is being backuped via LAN in spite of SAN. Shared devices on the primary server can be viewed properly on the secondary server.

Do you have any suggestion or idea about how to fix this kind of situation? A step-by-step to configure SAN SSO in iSCSI is welcome too.

Best regards,

Luiz

[teiva-boy]

Can you create a drawing of your network and connectivity for us?  Symantec has the digital whiteboard application which is free:

http://www.symantec.com/business/offer.jsp?offer_id=symantec-digital-whiteboard

Or take a visio drawing, delete any pertinent host names and internal IP's, and export as a JPG.

One thing to note about iSCSI is that if you dont have MPIO configured correctly, and are not sending concurrent jobs, you'll never utilize the extra links.  So knowing that you only have two tape drives, you cannot ever use more than 2Gb's worth of bandwidth anyways.

Also note that iSCSI at full saturation per link, is right at the ragged edge of an LTO 4's optimum performance (assuming 2:1 compression).  You would be better off with SAS or U320 connectivity (it's technically faster)

[Colin_Weaver]

Which server are you creating the backup jobs on?

Reason for question is SSO on it's own only provides library sharing management it does not provide centralized job creation which is a function of CASO which you state you don't have.

So if you are creting all your jobs on the Primary then it will backup over the LAN to the Primary and then use the Primary iSCSI connectuion to the library.