Oh, Pardeep:
I don't think lucene is a advanced storage app to support rollback to a 
history check point (which would be support only in distributed system, such 
as tow phase commit or transactional web services)

                                                yours

On Friday, November 12, 2010 11:25:45 am Pradeep Singh wrote:
> In some cases you can rollback to a named checkpoint. I am not too sure but
> I think I read in the lucene documentation that it supported named
> checkpointing.
> 
> On Thu, Nov 11, 2010 at 7:12 PM, gengshaoguang 
<gengshaogu...@ceopen.cn>wrote:
> > Hi, Kouta:
> > Any data store does not support rollback AFTER commit, rollback works
> > only BEFORE.
> > 
> > On Friday, November 12, 2010 12:34:18 am Kouta Osabe wrote:
> > > Hi, all
> > > 
> > > I have a question about Solr and SolrJ's rollback.
> > > 
> > > I try to rollback like below
> > > 
> > > try{
> > > server.addBean(dto);
> > > server.commit;
> > > }catch(Exception e){
> > > 
> > >  if (server != null) { server.rollback();}
> > > 
> > > }
> > > 
> > > I wonder if any Exception thrown, "rollback" process is run. so all
> > > data would not be updated.
> > > 
> > > but once commited, rollback would not be well done.
> > > 
> > > rollback correctly will be done only when "commit" process will not?
> > > 
> > > Solr and SolrJ's rollback system is not the same as any RDB's rollback?

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