Re: Cassandra Data Model design

2014-09-17 Thread Hao Cheng
How slow is slow? Regardless of the data model question, in my experience 500 rows of relatively light content should be lightning fast. Looking at my performance results on a test cluster of 3x r3.large AWS instances, we reach an op rate on Cassandra's stress test of at least 1000 operations per s

Re: Migration from Cassandra 1.2.5 to Cassandra 2.0.8 with changed partitioner settings

2014-07-30 Thread Hao Cheng
No idea if this will help, but have you tried the sstable2json and json2sstable utilities to output json from your old cluster and import it into the new one? On Wed, Jul 30, 2014 at 1:40 AM, Kais Ahmed wrote: > hi tsi, > > You have you upgrade to 1.2.9 first. > > 2.0.0 > = > > Upgrading >

Re: Why is the cassandra documentation such poor quality?

2014-07-24 Thread Hao Cheng
I second this, especially since the version association for blog posts is often vague. This makes looking at historical blog posts quite annoying because it's difficult to tell if some of the specific advice has changed since. On Jul 24, 2014 2:23 PM, "Jack Krupansky" wrote: > Blog posts are gr

Re: Cassandra on AWS suggestions for data safety

2014-07-24 Thread Hao Cheng
se Priam and if so, how were your experiences with it? On Thu, Jul 24, 2014 at 3:07 AM, Alex Major wrote: > On Thu, Jul 24, 2014 at 12:12 AM, Hao Cheng wrote: > >> Hello, >> >> Based on what I've read in the archives here and on the documentation on >> Datas

Cassandra on AWS suggestions for data safety

2014-07-23 Thread Hao Cheng
Hello, Based on what I've read in the archives here and on the documentation on Datastax and the Cassandra Community, EBS volumes, even provisioned IOPS with EBS optimized instances, are not recommended due to inconsistent performance. This I can deal with, but I was hoping for some recommendation