0.20.6 uses Lucene 3 and 1.1.1 uses Lucene 4. Lucene is always backwards compatible for at least 1 major version, so your data should be fine and there is no need to reindex. Others might disagree, but I would simply backup the data and run the latest version. An optimize might help force older segments into the latest Lucene 4 format.
Prior to version 1.x, you cannot run clusters with different major versions. You will need to do a full cluster restart. If you are using a Java client, they would also need to be upgraded. http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/setup-upgrade.html You will greatly benefit from an upgrade. The memory improvements in Lucene 4 alone (ES versions 0.90+) are worth it. Cheers, Ivan On Wed, May 28, 2014 at 2:33 PM, ciatog <[email protected]> wrote: > I currently have elasticsearch on 3 production servers with an average of > 30 sites per server. > > Initially version 0.20.6 of elasticsearch was installed but I'd like to > move them all up to 1.1.1 to take advantage of new features but also to not > fall behind even more then has already happened. > > The option of upgrading to 1.1.1 on the servers and then regenerating all > indexes is something that could be done as a last option but since each > site depends on the search so extensively and would need to be down for > some time I'd rather avoid that if at all possible. > > Here are my questions: > - Do indexes created in 0.20.6 work in 1.1.1? > - Has anyone ever ran more then one instance of elasticsearch, both with > different version numbers on the same server? > - Are there other options here that I haven't considered that someone > else has used successfully in this kind of situation? > > Any suggestions or help is greatly appreciated. > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/3f9434b1-1958-47a2-b6db-07e32519a253%40googlegroups.com<https://groups.google.com/d/msgid/elasticsearch/3f9434b1-1958-47a2-b6db-07e32519a253%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQAUhy9sgHpBcwOoWOWe1L11Pehv9evXkzC%2BYim-xciDaw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
