added "always snapshot when upgrading" advice
added "always snapshot when upgrading" advice

git-svn-id: fad5a61f0599d0fa6686745ed37d3649e5fd7db1@1198128 13f79535-47bb-0310-9956-ffa450edef68

Stratio/stratio-cassandra,chbatey/cassandra-1,Stratio/stratio-cassandra,blerer/cassandra,xiongzheng/Cassandra-Research,EnigmaCurry/cassandra,stef1927/cassandra,JeremiahDJordan/cassandra,nakomis/cassandra,mashuai/Cassandra-Research,yukim/cassandra,Stratio/cassandra,kgreav/cassandra,michaelmior/cassandra,tongjixianing/projects,yanbit/cassandra,jbellis/cassandra,DikangGu/cassandra,phact/cassandra,ben-manes/cassandra,ifesdjeen/cassandra,helena/cassandra,Imran-C/cassandra,darach/cassandra,jasobrown/cassandra,jeffjirsa/cassandra,mshuler/cassandra,belliottsmith/cassandra,EnigmaCurry/cassandra,mkjellman/cassandra,knifewine/cassandra,WorksApplications/cassandra,guard163/cassandra,aureagle/cassandra,thobbs/cassandra,AtwooTM/cassandra,rackerlabs/cloudmetrics-cassandra,weideng1/cassandra,mklew/mmp,pcn/cassandra-1,apache/cassandra,Instagram/cassandra,joesiewert/cassandra,EnigmaCurry/cassandra,nutbunnies/cassandra,mambocab/cassandra,sbtourist/cassandra,ben-manes/cassandra,jasonwee/cassandra,leomrocha/cassandra,pallavi510/cassandra,michaelmior/cassandra,newrelic-forks/cassandra,snazy/cassandra,pbailis/cassandra-pbs,DICL/cassandra,a-buck/cassandra,swps/cassandra,HidemotoNakada/cassandra-udf,DavidHerzogTU-Berlin/cassandra,nakomis/cassandra,bcoverston/apache-hosted-cassandra,DavidHerzogTU-Berlin/cassandraToRun,sriki77/cassandra,scaledata/cassandra,nitsanw/cassandra,nutbunnies/cassandra,scaledata/cassandra,carlyeks/cassandra,ptnapoleon/cassandra,aweisberg/cassandra,qinjin/mdtc-cassandra,blambov/cassandra,krummas/cassandra,gdusbabek/cassandra,adejanovski/cassandra,jasobrown/cassandra,belliottsmith/cassandra,boneill42/cassandra,ben-manes/cassandra,leomrocha/cassandra,shawnkumar/cstargraph,sbtourist/cassandra,adelapena/cassandra,newrelic-forks/cassandra,belliottsmith/cassandra,mklew/mmp,rackerlabs/cloudmetrics-cassandra,blambov/cassandra,ejankan/cassandra,jkni/cassandra,stef1927/cassandra,Imran-C/cassandra,pcmanus/cassandra,pthomaid/cassandra,MasahikoSawada/cassandra,newrelic-forks/cassandra,kangkot/stratio-cassandra,sayanh/ViewMaintenanceSupport,joesiewert/cassandra,yonglehou/cassandra,pauloricardomg/cassandra,szhou1234/cassandra,hengxin/cassandra,RyanMagnusson/cassandra,joesiewert/cassandra,DikangGu/cassandra,blerer/cassandra,guard163/cassandra,MasahikoSawada/cassandra,mshuler/cassandra,sedulam/CASSANDRA-12201,ptnapoleon/cassandra,kangkot/stratio-cassandra,aweisberg/cassandra,pauloricardomg/cassandra,iamaleksey/cassandra,pcn/cassandra-1,GabrielNicolasAvellaneda/cassandra,rogerchina/cassandra,guanxi55nba/db-improvement,fengshao0907/Cassandra-Research,codefollower/Cassandra-Research,mheffner/cassandra-1,mambocab/cassandra,aboudreault/cassandra,likaiwalkman/cassandra,pcmanus/cassandra,ptuckey/cassandra,lalithsuresh/cassandra-c3,aweisberg/cassandra,kgreav/cassandra,sharvanath/cassandra,caidongyun/cassandra,jkni/cassandra,dongjiaqiang/cassandra,jeromatron/cassandra,Jaumo/cassandra,knifewine/cassandra,sivikt/cassandra,kangkot/stratio-cassandra,bpupadhyaya/cassandra,bcoverston/cassandra,nakomis/cassandra,nlalevee/cassandra,bpupadhyaya/cassandra,modempachev4/kassandra,xiongzheng/Cassandra-Research,qinjin/mdtc-cassandra,GabrielNicolasAvellaneda/cassandra,Jollyplum/cassandra,juiceblender/cassandra,xiongzheng/Cassandra-Research,Stratio/cassandra,rdio/cassandra,clohfink/cassandra,AtwooTM/cassandra,pofallon/cassandra,weipinghe/cassandra,leomrocha/cassandra,adelapena/cassandra,caidongyun/cassandra,tommystendahl/cassandra,dprguiuc/Cassandra-Wasef,nlalevee/cassandra,Bj0rnen/cassandra,qinjin/mdtc-cassandra,jasonstack/cassandra,lalithsuresh/cassandra-c3,JeremiahDJordan/cassandra,pallavi510/cassandra,miguel0afd/cassandra-cqlMod,christian-esken/cassandra,ifesdjeen/cassandra,chaordic/cassandra,jeffjirsa/cassandra,yangzhe1991/cassandra,ejankan/cassandra,michaelsembwever/cassandra,pauloricardomg/cassandra,rogerchina/cassandra,jeromatron/cassandra,shawnkumar/cstargraph,sedulam/CASSANDRA-12201,driftx/cassandra,DICL/cassandra,hengxin/cassandra,scylladb/scylla-tools-java,aboudreault/cassandra,swps/cassandra,helena/cassandra,clohfink/cassandra,taigetco/cassandra_read,Stratio/stratio-cassandra,Stratio/stratio-cassandra,cooldoger/cassandra,thelastpickle/cassandra,RyanMagnusson/cassandra,blambov/cassandra,blambov/cassandra,emolsson/cassandra,michaelmior/cassandra,ejankan/cassandra,adejanovski/cassandra,LatencyUtils/cassandra-stress2,miguel0afd/cassandra-cqlMod,snazy/cassandra,strapdata/cassandra,mgmuscari/cassandra-cdh4,pofallon/cassandra,shawnkumar/cstargraph,bdeggleston/cassandra,yanbit/cassandra,bdeggleston/cassandra,krummas/cassandra,sriki77/cassandra,christian-esken/cassandra,carlyeks/cassandra,pauloricardomg/cassandra,beobal/cassandra,aarushi12002/cassandra,exoscale/cassandra,DavidHerzogTU-Berlin/cassandra,scylladb/scylla-tools-java,sbtourist/cassandra,sluk3r/cassandra,dkua/cassandra,lalithsuresh/cassandra-c3,kgreav/cassandra,jasobrown/cassandra,belliottsmith/cassandra,darach/cassandra,emolsson/cassandra,gdusbabek/cassandra,aboudreault/cassandra,dkua/cassandra,stef1927/cassandra,snazy/cassandra,heiko-braun/cassandra,clohfink/cassandra,helena/cassandra,ollie314/cassandra,matthewtt/cassandra_read,chaordic/cassandra,a-buck/cassandra,mklew/mmp,HidemotoNakada/cassandra-udf,ibmsoe/cassandra,nitsanw/cassandra,beobal/cassandra,ifesdjeen/cassandra,instaclustr/cassandra,bcoverston/apache-hosted-cassandra,exoscale/cassandra,pofallon/cassandra,mshuler/cassandra,sluk3r/cassandra,jeffjirsa/cassandra,caidongyun/cassandra,whitepages/cassandra,GabrielNicolasAvellaneda/cassandra,juiceblender/cassandra,bdeggleston/cassandra,matthewtt/cassandra_read,spodkowinski/cassandra,fengshao0907/cassandra-1,DikangGu/cassandra,tommystendahl/cassandra,Jaumo/cassandra,jsanda/cassandra,mheffner/cassandra-1,szhou1234/cassandra,jasonstack/cassandra,spodkowinski/cassandra,spodkowinski/cassandra,pcn/cassandra-1,mkjellman/cassandra,rdio/cassandra,nvoron23/cassandra,ptuckey/cassandra,pkdevbox/cassandra,spodkowinski/cassandra,beobal/cassandra,dprguiuc/Cassandra-Wasef,sayanh/ViewMaintenanceCassandra,yanbit/cassandra,tommystendahl/cassandra,cooldoger/cassandra,thelastpickle/cassandra,mashuai/Cassandra-Research,thelastpickle/cassandra,juiceblender/cassandra,szhou1234/cassandra,mike-tr-adamson/cassandra,guanxi55nba/key-value-store,fengshao0907/Cassandra-Research,szhou1234/cassandra,weideng1/cassandra,ifesdjeen/cassandra,WorksApplications/cassandra,jasobrown/cassandra,asias/cassandra,heiko-braun/cassandra,rackerlabs/cloudmetrics-cassandra,mt0803/cassandra,adejanovski/cassandra,apache/cassandra,hengxin/cassandra,scaledata/cassandra,adelapena/cassandra,christian-esken/cassandra,iburmistrov/Cassandra,blerer/cassandra,thobbs/cassandra,guanxi55nba/key-value-store,josh-mckenzie/cassandra,rogerchina/cassandra,bcoverston/apache-hosted-cassandra,kangkot/stratio-cassandra,likaiwalkman/cassandra,pcmanus/cassandra,Instagram/cassandra,JeremiahDJordan/cassandra,chbatey/cassandra-1,aureagle/cassandra,LatencyUtils/cassandra-stress2,iburmistrov/Cassandra,taigetco/cassandra_read,rmarchei/cassandra,pthomaid/cassandra,bmel/cassandra,Bj0rnen/cassandra,driftx/cassandra,strapdata/cassandra,regispl/cassandra,Instagram/cassandra,jasonwee/cassandra,sharvanath/cassandra,thobbs/cassandra,aarushi12002/cassandra,jeromatron/cassandra,strapdata/cassandra,dongjiaqiang/cassandra,yukim/cassandra,jeffjirsa/cassandra,darach/cassandra,mike-tr-adamson/cassandra,Stratio/cassandra,asias/cassandra,jsanda/cassandra,beobal/cassandra,josh-mckenzie/cassandra,guanxi55nba/db-improvement,codefollower/Cassandra-Research,emolsson/cassandra,mheffner/cassandra-1,LatencyUtils/cassandra-stress2,kangkot/stratio-cassandra,vramaswamy456/cassandra,nlalevee/cassandra,dprguiuc/Cassandra-Wasef,rmarchei/cassandra,mike-tr-adamson/cassandra,yonglehou/cassandra,ollie314/cassandra,ollie314/cassandra,whitepages/cassandra,scylladb/scylla-tools-java,jbellis/cassandra,pthomaid/cassandra,project-zerus/cassandra,scylladb/scylla-tools-java,hhorii/cassandra,vaibhi9/cassandra,guanxi55nba/db-improvement,asias/cassandra,chbatey/cassandra-1,mshuler/cassandra,DavidHerzogTU-Berlin/cassandraToRun,driftx/cassandra,instaclustr/cassandra,driftx/cassandra,macintoshio/cassandra,hhorii/cassandra,macintoshio/cassandra,tjake/cassandra,tjake/cassandra,nvoron23/cassandra,jbellis/cassandra,jrwest/cassandra,bcoverston/cassandra,weipinghe/cassandra,nitsanw/cassandra,DICL/cassandra,instaclustr/cassandra,guanxi55nba/key-value-store,fengshao0907/cassandra-1,aweisberg/cassandra,swps/cassandra,modempachev4/kassandra,mgmuscari/cassandra-cdh4,apache/cassandra,mgmuscari/cassandra-cdh4,aarushi12002/cassandra,bdeggleston/cassandra,phact/cassandra,modempachev4/kassandra,josh-mckenzie/cassandra,bcoverston/cassandra,a-buck/cassandra,yhnishi/cassandra,regispl/cassandra,project-zerus/cassandra,shookari/cassandra,michaelsembwever/cassandra,sayanh/ViewMaintenanceSupport,vramaswamy456/cassandra,instaclustr/cassandra,phact/cassandra,michaelsembwever/cassandra,jrwest/cassandra,regispl/cassandra,nutbunnies/cassandra,boneill42/cassandra,knifewine/cassandra,fengshao0907/Cassandra-Research,strapdata/cassandra,pkdevbox/cassandra,Stratio/stratio-cassandra,weideng1/cassandra,codefollower/Cassandra-Research,sivikt/cassandra,rmarchei/cassandra,Jollyplum/cassandra,AtwooTM/cassandra,Instagram/cassandra,macintoshio/cassandra,sriki77/cassandra,Jaumo/cassandra,ibmsoe/cassandra,iburmistrov/Cassandra,kgreav/cassandra,jrwest/cassandra,clohfink/cassandra,mkjellman/cassandra,hhorii/cassandra,shookari/cassandra,chaordic/cassandra,tjake/cassandra,HidemotoNakada/cassandra-udf,ptnapoleon/cassandra,wreda/cassandra,mt0803/cassandra,juiceblender/cassandra,wreda/cassandra,blerer/cassandra,WorksApplications/cassandra,dkua/cassandra,tongjixianing/projects,jkni/cassandra,bpupadhyaya/cassandra,RyanMagnusson/cassandra,DavidHerzogTU-Berlin/cassandra,yangzhe1991/cassandra,matthewtt/cassandra_read,Jollyplum/cassandra,tjake/cassandra,sayanh/ViewMaintenanceCassandra,bmel/cassandra,shookari/cassandra,yukim/cassandra,likaiwalkman/cassandra,apache/cassandra,sluk3r/cassandra,Bj0rnen/cassandra,yonglehou/cassandra,sedulam/CASSANDRA-12201,adelapena/cassandra,wreda/cassandra,WorksApplications/cassandra,jrwest/cassandra,nvoron23/cassandra,michaelsembwever/cassandra,pbailis/cassandra-pbs,tommystendahl/cassandra,iamaleksey/cassandra,ibmsoe/cassandra,guard163/cassandra,yhnishi/cassandra,gdusbabek/cassandra,krummas/cassandra,snazy/cassandra,Imran-C/cassandra,pallavi510/cassandra,miguel0afd/cassandra-cqlMod,exoscale/cassandra,project-zerus/cassandra,bmel/cassandra,ptuckey/cassandra,MasahikoSawada/cassandra,whitepages/cassandra,yukim/cassandra,weipinghe/cassandra,cooldoger/cassandra,yhnishi/cassandra,cooldoger/cassandra,aureagle/cassandra,sayanh/ViewMaintenanceCassandra,pbailis/cassandra-pbs,bcoverston/cassandra,iamaleksey/cassandra,krummas/cassandra,carlyeks/cassandra,heiko-braun/cassandra,yangzhe1991/cassandra,mambocab/cassandra,fengshao0907/cassandra-1,vaibhi9/cassandra,josh-mckenzie/cassandra,sharvanath/cassandra,mkjellman/cassandra,DavidHerzogTU-Berlin/cassandraToRun,iamaleksey/cassandra,stef1927/cassandra,boneill42/cassandra,jsanda/cassandra,mt0803/cassandra,mike-tr-adamson/cassandra,jasonstack/cassandra,dongjiaqiang/cassandra,tongjixianing/projects,vaibhi9/cassandra,vramaswamy456/cassandra,mashuai/Cassandra-Research,thelastpickle/cassandra,rdio/cassandra,pkdevbox/cassandra,sivikt/cassandra,taigetco/cassandra_read,jasonwee/cassandra