Have you looked at Scan.setMaxVersions(int)? Is that what you're looking for?
Also, when you created the table, it has a default max of three versions. Did you use the java API or the shell to create your table? HColumnDescriptor.setMaxVersions(int) is what you want to set when you create the table initially. To keep all versions, use setMaxVersions(Integer.MAX_VALUE). JG > -----Original Message----- > From: Eric Yang [mailto:[email protected]] > Sent: Saturday, July 03, 2010 4:19 PM > To: [email protected] > Subject: Re: stargate retrieve multiple version of a cell > > Hi Jonathan, > > I am trying to store large time series data. I am using a row as a > group for one hour's data. My row contains 60 timestamps, and each > timestamp has various cell values. I am hoping this will produce row > that is not too thick and table that is slightly shorter. I am fine > with none ordered versioning, as long as I get timestamp when data is > retrieved for the timestamp range. When I scan for the cell, I only > get the most recent three versions of the cell. > > This was tested on hbase 0.20.5, and hadoop 0.20.2. > > regards, > Eric > > > > On Sat, Jul 3, 2010 at 2:34 PM, Jonathan Gray <[email protected]> > wrote: > > What exactly are you trying to do with the timestamp? Currently even > duplicates are retained and returned, but the order is not guaranteed > (though we are working on this). > > > > The behavior is related only to time/order of operations, no > difference if using different clients (not including behavior from > write buffering). > > > > JG > > > >> -----Original Message----- > >> From: Eric Yang [mailto:[email protected]] > >> Sent: Saturday, July 03, 2010 2:32 PM > >> To: [email protected] > >> Subject: Re: stargate retrieve multiple version of a cell > >> > >> I think I just found the answer of my own question. It was not > >> stargte's problem. The data was not stored in hbase as I expected > it > >> to be. This raised a more basic question: > >> > >> I am storing data like this: > >> > >> Put row1, cf1:c1: 0, timestamp: 10 > >> Put row1, cf1:c2: 10, timestamp: 10 > >> Put row1, cf1:c2: 15, timestamp: 20 > >> Put row1, cf1:c1: 1, timestamp: 20 > >> > >> I am updating individual column by timestamp, and repeat repeat this > >> 60 times for each of the columns. This is all executed by the same > >> client. When I scan for "row1, c2", would I get 60 different values > >> for each of the timestamp? > >> > >> What would happen if this kind of updates are applied by different > >> hbase client? > >> > >> regards, > >> Eric > >> > >> On Sat, Jul 3, 2010 at 1:56 PM, Eric Yang <[email protected]> wrote: > >> > Hi all, > >> > > >> > I am trying to use stargate to get multiple versions of the cell, > and > >> > my query looks like this: > >> > > >> > http://localhost:9090/chukwa/1278180000000-Eric-Yangs- > >> > iMac.local/Hadoop_dfs_namenode:CreateFileOps/1278183540000/127818990000 > >> 0 > >> > > >> > table name: chukwa > >> > row: 1278187200000-Eric-Yangs-iMac.local > >> > column: Hadoop_dfs_namenode:CreateFileOps > >> > start-timestamp: 1278183540000 > >> > end-timestamp: 1278189900000 > >> > > >> > It only shows me the most recent 3 versions, but not all the > versions > >> > in this time range. Is this the right syntax? What am I doing > >> wrong? > >> > Thanks > >> > > >> > regards, > >> > Eric > >> > > >
