I helped a family member to get access back to his instagram account which also got hacked and got his username changed. What we did was follow the instructions in https://help.instagram.com/contact/740949042640030 and kept in touch with the instagram staff via email. They kept asking various security questions during email and finally sent a recovery link.
C* makes it much easier to manage a cluster of Solr as the data grows (specifically with DSE), as with the tight integration you get all the benefits of C*. (HA, eventual consistency, multi-dc replication..)
Why do you think this approach isn't scalable? would love to hear your input on that. Also what commercial database systems do you think will be good for this?
It's either not case insensitive or matching parts of words, as it didn't filter this: Bitcoin?s roller-coaster ride gets wilder as Wall Street, China climb on (arstechnica.com)
Although this isn't a tutorial, but I thought it was worth mentioning. pragprog.com has released a screencast series on Backbone, by Derek Bailey, the creator of Backbone.Marionette and various other Backbone extensions. I've personally watched the series and gained lots of insight on Backbone thanks to it. (http://pragprog.com/screencasts/v-dback/hands-on-backbone-js)