Re: Moving data from one datacenter to another

2012-12-21 Thread Vegard Berget
Thanks for answers. It went quite well. Note what Aaron writes about sstable names, as I did the job before his mail, and changed one name wrong :-) - and that caused some troubles ( a lot of missing file errors )- i think that was to blame for some counter cf being messed up. As it was not imp

Re: Moving data from one datacenter to another

2012-12-20 Thread aaron morton
Sounds about right, i've done similar things before. Some notes… * I would make sure repair has completed on the source cluster before making changes. I just like to know data is distributed. I would also do it once all the moves are done. * Rather than flush, take a snap shot and copy from t

Re: Moving data from one datacenter to another

2012-12-19 Thread B. Todd Burruss
to get it "correct", meaning consistent, it seems you will need to do a repair no matter what since the source cluster is taking writes during this time and writing to commit log. so to avoid filename issues just do the first copy and then repair. i am not sure if they can have any filename. to

Moving data from one datacenter to another

2012-12-19 Thread Vegard Berget
Hi, I know this have been a topic here before, but I need some input on how to move data from one datacenter to another (and google just gives me some old mails) - and at the same time moving "production" writing the same way.  To add the target cluster into the source cluster and just replicate da