f0:string f1:int f2:int f3:double
primary key: f0,f1,f2
partition key: f1
bucket key: f2
bucket count: 1
add deletion vector

Msgs:
snapshot-1-2
Add:"Whether I shall turn out to be the hero of my own life.", 10, 0, 11.0
Add:"Emily", 10, 0, 12.0
Add:"Bob", 10, 0, 13.1
Add:"Two roads diverged in a wood, and I took the one less traveled by, And that has made all the difference.", 10, 0, 14.1

snapshot 3-4
Delete: "Emily", 10, 0, 12.0
UpdateAfter: Bob", 10, 0, 113.1

