Re: Cassandra super column query

2012-02-16 Thread krishna melkote
Hello, I have recently started using Cassandra. I have designed a super column as below. It is basically a set of university results. I am using Hector java API to interface with Cassandra. I am struggling a bit to find what is the proper way to query the results for a particular registration

Re: Go over super column data and delete the first X rows

2010-05-23 Thread Yan Virin
I understand, I wanted to know how exactly should I do it manually... is there some "best" practice of going over all the "older" rows and deleting them? On Sun, May 23, 2010 at 5:25 PM, Jonathan Ellis wrote: > Answered on the user@ list. > > On Sun, May 23, 2010 at 3:35 AM, Yan Virin wrote: >

Re: Go over super column data and delete the first X rows

2010-05-23 Thread Jonathan Ellis
Answered on the user@ list. On Sun, May 23, 2010 at 3:35 AM, Yan Virin wrote: > Hi > I want to use cassandra for storing some data which gets irrelevant with > time. There will be a lot of data and I want to run a procedure which will > delete the oldest from the repository from time to time. > T

Go over super column data and delete the first X rows

2010-05-23 Thread Yan Virin
Hi I want to use cassandra for storing some data which gets irrelevant with time. There will be a lot of data and I want to run a procedure which will delete the oldest from the repository from time to time. The column name which holds the data is a "timestamp" name, so I will want delete some rang

Re: super column

2010-05-22 Thread huajun qi
Thank you! Is there a way to store that kind of data?

Re: super column

2010-05-22 Thread Jonathan Ellis
(a) No (b) you should restrict it to < 2GB of data in 0.6 On Sat, May 22, 2010 at 3:55 AM, huajun qi wrote: > Can the value of a column under a super column be a super column? > > For examples: > > sc={ >        name:"name", >        value:{ >      

super column

2010-05-22 Thread huajun qi
Can the value of a column under a super column be a super column? For examples: sc={ name:"name", value:{ {name:"First Name", value:"John"} {name:"Last Name", value:"LBJ"} } } this is a super co

Is there any way to enable the multiple super column names at a time?

2010-04-11 Thread Dop Sun
Hi, I don't know whether I have missed anything here, but can we get columns for multiple Super Column Names at a time, like what we can do for Keys (by key range or list of keys) or columns (by column range or column list)? While I'm doing the work with Cassandra, I usually think the