Sitecore index rebuilding practices
问题 In our sitecore project (6.6.0 rev. 130404), we have more than 2 million total sitecore items. We have several Lucene indexes (each for a subset of these items) configured. The issue we face is the time it takes to freshly rebuild these indexes. Specially with the Sitecore's QuickSearch index, it might take nearly a full day to rebuild that index, in addition to our custom indexes. What are the usual practices followed with maintenance of large sitecore indexes in day-to-day operations? How