HBase schema row key design - increment counter?
Question
I am struggling to find any documents about increment counter in HBase. Any one knows any?
I am designing a Hbase table schema for my application. My row_key can't guarantee 100% uniqueness. So the question is that when my row_key starts having duplicates, I would like to have an increment counter as part of the row key to distinguish them. thoughts?
Solution
you can do one thing just add time stamp with your row key so it will be always unique
as
info:aaa#timestamp
info:bbb#timestamp
info:ccc#timestamp
info:aaa#timestamp
info:bbb#timestamp
info:ccc#timestamp
info:aaa#timestamp
info:bbb#timestamp
info:ccc#timestamp
os if you do like this the row key will always unique
one more thing you can try
uidgen
It's usually found in /usr/bin/
nyancat ~ # uuidgen 488bc393-a4f5-4a83-8df8-8c15e737dcc5
if you are using java then
public class GenerateUUID {
public static final void main(String... aArgs){
UUID idOne = UUID.randomUUID();
UUID idTwo = UUID.randomUUID();
log("UUID One: " + idOne);
log("UUID Two: " + idTwo);
}
private static void log(Object aObject){
System.out.println( String.valueOf(aObject) );
}
}
and then you can attach this as your key
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