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OST Licenses needed for ExaGrid?

Created: 24 Jan 2012 • Updated: 24 Jan 2012 | 5 comments
cpmak's picture

I have mixed information on this. Is OST licenses needed for ExaGrid?

Source 1: OST licenses are not needed since ExaGrid is doing post dedupe. Therefore the basic disk licenses are sufficient if customer is not doing Storage Life Policy or having different retention periods for the backups.

Source 2: OST licenses are needed as long as backups are stored in any deduplication appliances.

Can someone please advise?


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Yasuhisa Ishikawa's picture

There are no statement for difference of pre and post process in license guide(provided for partners only), so I suppose that Enterprise Disk license is needed when you store backups into deduplication storage regardless of when deduplication take place.

It is better to ask sales rep of Symantec or partner.

Authorized Symantec Consultant(ASC) Data Protection in Tokyo, Japan

Riaan.Badenhorst's picture

Its not so much about dedupe but rather about how you plan to use the device. OST is a plugin enabling communication between netbackup and the device (exagrid, datadomain, quantum, etc). The devices are configured as open storage devices/storage units. This configuration also allows advanced features to be used like optimized duplication via slp's.

So the question is, are you going to configure the device in this manner, or as a network share using basic disk?

If you want the bells and whistles above, you need Enterprise Disk which includes VTL, OST, Storage Lifecycle Policies, Media Server Load Balancing, and Intelligent Disk Capacity Management


Riaan Badenhorst

ITs easy :)

cpmak's picture

Due to budget constraints, I am looking to see if Basic Disk is sufficient.

So if I am to configure ExaGrid as a network share and I do not need all the bells and whistles, I can do with the Basic Disk?

teiva-boy's picture

Enterprise Disk is required for ANY storage type that is more than a JBOD.  If it's does VTL, replication, or dedupe, you will NEED Enterprise Disk.

Using basic disk is against license compliancy.

However with ENterprise Disk, you have OST, so bingo you also get value add to this too, not just paying for a tax to use someone elses dedupe.

There is an online portal, save yourself the long hold times. Create ticket online, then call in with ticket # in hand :-) "We backup data to restore, we don't backup data just to back it up."

Obi Wan's picture

Teiva-boy is correct - no matter how the OST device is presented to Backup Exec or NetBackup, customers must purchase Enterprise disk for NBU or the Media Server Deduplication license for Backup Exec. The End User License Agreement (EULA) specifically calls out the transport of data to a back end post processing OST device that can perform deduplication. This is also known by all of Symantec's OST partners like Exagrid, Data Domain, Quantum................. So, if a Symantec OST partner tells you to just share out an NSF share and use basic disk, you are being told the wrong information and you will wind up in license violation.

Also, most OST vendors must also sell customers their OST plug-in.

This all begs the question, with the introduction of NBU and BE appliances, why would anyone not want to benefit from the true promise of deduplication by reducing the client side backup window, reducing the amount of data sent between the client and the backup infrastructure, use less storage because you don't have to pay for a landing zone before dedup/compression operations can begin or, pay for extremely large and exensive processing/cache subsystems to perform inline compression/deduplication?

They Symantec PBBA (purpose built backup appliances) remove the complexity of managing multiple vendors for backup, managing/maintaining operating systems, OS updates, the backup application and it's updates, hardware drivers and storage and, it's all tuned to deliver optimum performance and, it's natively integrated with NetBackup and Backup Exec!

At the end of the day, customers have the option to choose - that's the great part about Symantec. Even though we have a better solution, we give customers choices.