> if I do not upgrade the sstables what is going to happen?
Things will break. 
Things you would normally like to work like repair. 

The new version nodes can read old data. But when they stream old data files 
between themselves (during repair) they have to be able to write the bloom 
filter, index etc in the old data file format. Which they cannot do. 

Cheers

-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com

On 16/05/2012, at 2:09 PM, Boris Yen wrote:

> Hi,
> 
> Our cluster is currently running on 0.8.10, we plan on upgrading it to 1.0.x. 
> We read the document from the datastax website, the final step is to use 
> nodetool upgradesstables. Since this command might take time to finish, I 
> wonder if this step could be skip? if I do not upgrade the sstables what is 
> going to happen?
> 
> Thanks
> Boris

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