not sure you are going to get that much better performance doing NDMP over IP ...your IP link is going to be the bottleneck.

Sorry, but what thread do you mean? I do not see a link anywhere.

yes, you would need to attach aux ports on datamovers to your fiber channel fabric and zone tape drives directly to datamovers.  Netbackup server will need to be able to communicate with a network interface on the datamover. Take a look at this thread, specifically documentation mentioned.

Also, after reading some Symantec documentation, Symantec references this document : http://channeladvantage.bakbone.com/nam/documents/NDMP_Backups_With_Celerra.pdf, which on page 22 it mentions that when connected to a fabric switched environment (which I have), it is only going to be using 1Gb....what advantage would I have of going from LAN to SAN if it can only perform at 1Gb/sec???

Is there a more up to date document that details all commands that need to be run on the data mover?

well if I do move the SAN attached NDMP backup, what are the steps in getting that setup?

Would I have to attach the AUX LC ports to the SAN fabric and then zone the tape drives to those ports?

Would Celerra need any commands run against the data movers to be able to talk to NetBackup?

Essentially, what would be needed to get it going over the SAN?

keep in mind that another difference is that with 3-way NDMP over Ethernet you are also creating more LAN traffic and more work for your Netbackup media server.

while the Celerra does do the backup it has to send the backup stream over the LAN and the media server has to spend the CPU and I/O cycles to put it into tape.

with NDMP directly to a data mover attached FC drive the Celerra does all the work - the Netbackup server just sends the command to get the backup started and at the end gets the file history to add it to its database.

the downside is that these drives arent as flexible - unless you can do drive sharing the would be dedicated to Celerra backup only.

If you have the FC ports on the library and the switch available then I would recommend to go the FC route

Rainer

Oops ..this thread: https://community.emc.com/message/447077#447077

I have 4G fiber channel infrastructure,  my aux ports are connected to my 4g capable switch and i am streaming NDMP backups over the fabric to fiber attached CDL (disk emulation library). When i have 4 concurrent NDMP jobs running (current max per datamover), i get around 160 MB/s. I think my CDL is throttling it a bit.

with a decent 1GBit Ethernet you can still get better performance with 3-way NDMP than with client LAN based backup.

mmarzotto schrieb: Also, after reading some Symantec documentation, Symantec references this document : http://channeladvantage.bakbone.com/nam/documents/NDMP_Backups_With_Celerra.pdf, which on page 22 it mentions that when connected to a fabric switched environment (which I have), it is only going to be using 1Gb....what advantage would I have of going from LAN to SAN if it can only perform at 1Gb/sec??? Is there a more up to date document that details all commands that need to be run on the data mover?

wow - that a very very old document from a time when most FC switches were 1 GBit and 2GBit FC was just emerging.

the Celerra data mover AUX ports will of course do 4GBit when connected to a FC switch that is capable of it

the correct document is here http://powerlink.emc.com/km/live1/en_US/Offering_Technical/Technical_Documentation/300-004-181.pdf

Rainer

P.S.: I am also astonished that Symantec would like to a document on the bakbone website since they are competitors

the reason I am thinking about NDMP is performance issues with a share I am backing up using NetBackup. I think the issue is that the share has millions of small files (jpegs, word docs, pdfs, txt, etc.), causing NetBackup to open, read, write all those files.

Would NDMP handle the backup process the same way that it is currently handling it? If so, wouldnt there still be performance issues with NDMP because of the many files it had to copy to tape?