This feature would make the ReplicationHandler more robust in its own
practice of "reserving" previous commit points, by pushing that code out
into Solr proper.
Jason Rutherglen wrote:
The timed deletion policy is a bit too abstract, as is keeping a
numbered limit of commit points. How would one know what they're
rolling back to when num limit is defined?
I think committing to a name and being able to roll back to it in Solr
is a good feature to add.
On Fri, Nov 12, 2010 at 2:47 AM, Michael McCandless
<luc...@mikemccandless.com> wrote:
In fact Lucene can rollback to a previous commit.
You just need to use a deletion policy that preserves past commits
(the default policy only keeps the most recent commit).
Once you have multiple commits in the index you can do fun things like
open an IndexReader on an old commit, rollback (open an IndexWriter on
an old commit, deleting the "future" commits). You can even open an
IndexWriter on an old commit yet still preserve the newer commits, to
"revert" changes to the index yet preserve the history.
You can use IndexReader.listCommits to get all commits currently in the index.
But I'm not sure if these capabilities are exposed yet through Solr.
Mike
On Thu, Nov 11, 2010 at 10:25 PM, Pradeep Singh<pksing...@gmail.com> 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?
