-----Original message----- > From:johnmu...@aol.com <johnmu...@aol.com> > Sent: Wednesday 25th June 2014 20:13 > To: solr-user@lucene.apache.org > Subject: How much free disk space will I need to optimize my index > > Hi, > > > I need to de-fragment my index. My question is, how much free disk space I > need before I can do so? My understanding is, I need 1X free disk space of > my current index un-optimized index size before I can optimize it. Is this > true?
Yes, 20 GB of FREE space to force merge an existing 20 GB index. > > > That is, let say my index is 20 GB (un-optimized) then I must have 20 GB of > free disk space to make sure the optimization is successful. The reason for > this is because during optimization the index is re-written (is this the > case?) and if it is already optimized, the re-write will create a new 20 GB > index before it deletes the old one (is this true?), thus why there must be > at least 20 GB free disk space. > > > Can someone help me with this or point me to a wiki on this topic? > > > Thanks!!! > > > - MJ >
