Information about the nVDF-Update
Posted by Samuel Turi on 28 April 2011 10:11 AM

Information about the nVDF-Update

Avira will change the update system to a new multiple VDF procedure (short: nVDF) in the third week of November. The "n" in nVDF shows that we will use 32 VDF files instead of 4 files. The new virus definition files will have new file names: instead of antivir0.vdf to antivir3.vdf the new names will be vbase000.vdf to vbase031.vdf. The required update is approx. 25 Mbyte. This comprehensive update can require preparation in larger networks. 

Our products support the new nVDF procedure in the following versions: Windows desktop products and Windows Server from Version 9; Unix products from Version 3, Avira AntiVir SharePoint and Avira AntiVir ISA Server from Version 3.

In order to guarantee a compatibility with older products, we additionally offer so-called incremental VDFs (iVDF) which consist of the previous four VDF files. Like this, also Avira products can be used which can't handle the nVDF files.

From engine version on the Avira products can work with iVDF files.

What does this mean concretely?

All users who have current Avira products don't need to change anything. They will get their updates as usual. Avira customers who are using the manual fusebundle update should consider to download the special nVDF fusebundle. We will provide you with the previous iVDF fusebundle, however, only until 30 March 2010. You need to upgrade to the current product version, if you want to use the manual update procedure afterwards. We will provide you with nVDF fuse bundle after the restructuring. There will be a link to our website so that you only need to adjust the file name and the download link.

Why do we release this change?

In the last years we observed an explosive growth of in the wild viruses. Therefore, the VDF0 file which is the basic file of the incremental procedure increased to a size of about 16 Mbyte. We had to update this file once a year. This update caused inconveniences for many customers and produced a heavy load on our update infrastructure. This also applies, to a certain extent, to the updates of the VDF1 and VDF2 files.

Due to the change to the nVDF procedure these update intervals are prolonged. We assume that e.g. an update of the VDF0 updates will be necessary every third year. In conclusion we can say that the nVDF procedure will improve the update situation for all Avira users.


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