Re: Cassandra for numerical data set

2011-08-16 Thread aaron morton
> Is that because cassandra really cost a huge disk space? The general design approach is / has been that storage space is cheap and plentiful. > Well my target is to simply get the 1.3T compressed to 700 Gig so that I can > fit it into a single server, while keeping the same level of performa

Re: Cassandra for numerical data set

2011-08-16 Thread Yi Yang
BTW, If I'm going to insert a SCF row with ~400 columns and ~50 subcolumns under each column, how often should I do a mutation? per column or per row? On Aug 16, 2011, at 3:24 PM, Yi Yang wrote: > > Thanks Aaron. > >>> 2) >>> I'm doing batch writes to the database (pulling data from multiple

Re: Cassandra for numerical data set

2011-08-16 Thread Yi Yang
Thanks Aaron. >> 2) >> I'm doing batch writes to the database (pulling data from multiple resources >> and put them together). I wish to know if there's some better methods to >> improve the writing efficiency since it's just about the same speed as >> MySQL, when writing sequentially. See

Re: Cassandra for numerical data set

2011-08-16 Thread aaron morton
> > 2) > I'm doing batch writes to the database (pulling data from multiple resources > and put them together). I wish to know if there's some better methods to > improve the writing efficiency since it's just about the same speed as MySQL, > when writing sequentially. Seems like the commit