If you are interested in the most recent 100 transactions, instead of using currentTimeMillis() as part of your key, you can use Long.MAX_VALUE-System.currentTimeMillis(). That way new entries get put at the top. Then you can have a start row of your scan to be "192.168.1.2" and the first result will be the most recent entry. You can then just scan for 100 rows and get all of what you want.
Dave -----Original Message----- From: Mark [mailto:[email protected]] Sent: Saturday, August 13, 2011 5:16 PM To: [email protected] Subject: Re: Generic Schema Question Ok so something like this? row cf:qual value ----------------------------------------- 192.168.1.2/1313280451 data:page "/foo/bar" 192.168.1.2/1313280451 data:referrer "google.com" 192.168.1.2/1313280451 data:session "f306e5af69b48568323fdc3018e40e7e" ----------------------------------------- 192.168.1.2/1313281242 data:page "/foo/baz" 192.168.1.2/1313281242 data:page "" 192.168.1.2/1313281242 data:page "f306e5af69b48568323fdc3018e40e7e" .... Will this allow me to query the last 100 rows for ip "192.168.1.2". If so, how? Will it be efficient? Also, would you mind explaining an alternative way of accomplishing this as I'm still trying to figure out all the possibilities. Thanks again On 8/13/11 4:53 PM, Blake Lemoine wrote: > You need to have the ip address followed by a slash followed by the time as > the row key. Or some other such a way of getting multiple rows per ip. > Then you could scan for the ip prefix. Of course that's just one possible > solution. > On Aug 13, 2011 1:01 PM, "Mark"<[email protected]> wrote: >> Hi all, I'm trying to wrap my head around HBase schema design and I am >> having trouble modeling the following use case: >> >> We store all our use behavior (clicks, searches, page views) in Hadoop >> and we would like to add this into HBase so we can interactively >> "explore" what our users are doing. For example we would like, given an >> IP address get back a list of all searches, page views, clicks etc that >> this user has attempted. >> >> My initial thought for something like this would be to create a table >> "Logs" with a CF "Data" that have qualifiers of "Search", "Click" and >> "View". Each column would have a row with the IP as its key. >> >> Is this along the right lines or am I missing something... sure feels >> like I am. Would anyone please explain how I would accomplish what I am >> looking for. >> >> Thanks
