On Thu, Sep 16, 2010 at 8:51 PM, Stack <[email protected]> wrote: > On Thu, Sep 16, 2010 at 3:59 PM, Vidhyashankar Venkataraman > <[email protected]> wrote: > > Hi > > Can someone explain (or refer me to a twiki which explains) which > versions of Hbase can be safely rolled back i.e., without any changes to the > underlying database and state? > > > > You cannot rollback without cluster restart, not yet anyways. > > If you cluster restart, you can go back from latest 0.20 release all > the ways to 0.20.0 I believe. There were no changes in data format > changes. You cannot go back beyond 0.20.x to 0.19.x. Data format > changed between those versions. > > Its looking like it might be possible to go back to 0.20.x from 0.89.x > or even 0.90.x its looking like since again no format changes. > > What about region ID naming changes? I don't think the new region IDs would work in 0.20.
-Todd -- Todd Lipcon Software Engineer, Cloudera
