Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

Thanks Tyler! On Thu, Feb 3, 2011 at 12:06 PM, Tyler Hobbs ty...@datastax.com wrote: On Wed, Feb 2, 2011 at 3:27 PM, Aditya Narayan ady...@gmail.com wrote: Can I have some more feedback about my schema perhaps somewhat more criticisive/harsh ? It sounds reasonable to me. Since you're

Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

Hey all, I need to store supercolumns each with around 8 subcolumns; All the data for a supercolumn is written at once and all subcolumns need to be retrieved together. The data in each subcolumn is not big, it just contains keys to other rows. Would it be preferred to have a supercolumn family

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

Actually, I am trying to use Cassandra to display to users on my applicaiton, the list of all Reminders set by themselves for themselves, on the application. I need to store rows containing the timeline of daily Reminders put by the users, for themselves, on application. The reminders need to be

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

To reiterate, so I know we're both on the same page, your schema would be something like this: - A column family (as you describe) to store the details of a reminder. One reminder per row. The row key would be a TimeUUID. - A super column family to store the reminders for each user, for each

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

I think you got it exactly what I wanted to convey except for few things I want to clarify: I was thinking of a single row containing all reminders ( not split by day). History of the reminders need to be maintained for some time. After certain time (say 3 or 6 months) they may be deleted by ttl

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

Any time I see/hear a single row containing all ... I get nervous. That single row is going to reside on a single node. That is potentially a lot of load (don't know the system) for that single node. Why wouldn't you split it by at least user? If it won't be a lot of load, then why are you

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

You got me wrong perhaps.. I am already splitting the row on per user basis ofcourse, otherwise the schema wont make sense for my usage. The row contains only *reminders of a single user* sorted in chronological order. The reminder Id are stored as supercolumn name and subcolumn contain tags for

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

I did not understand before... sorry. Again, depending upon how many reminders you have for a single user, this could be a long/wide row. Again, it really comes down to how many reminders are we talking about and how often will they be read/written. While a single row can contain millions

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

@Bill Thank you BIll! @Cassandra users Can others also leave their suggestions and comments about my schema, please. Also my question about whether to use a superColumn or alternatively, just store the data (that would otherwise be stored in subcolumns) as serialized into a single column in

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

Can I have some more feedback about my schema perhaps somewhat more criticisive/harsh ? Thanks again, Aditya Narayan On Wed, Feb 2, 2011 at 10:27 PM, Aditya Narayan ady...@gmail.com wrote: @Bill Thank you BIll! @Cassandra users Can others also leave their suggestions and comments about my

Re: Schema Design Question : Supercolumn family or just a Standard column family with columns containing serialized aggregate data?

On Wed, Feb 2, 2011 at 3:27 PM, Aditya Narayan ady...@gmail.com wrote: Can I have some more feedback about my schema perhaps somewhat more criticisive/harsh ? It sounds reasonable to me. Since you're writing/reading all of the subcolumns at the same time, I would opt for a standard column