> The SSTable files are in the -f- format from 0.8.10. If you can upgrade to the latest version it will make things easier. Start a node and use nodetool upgradesstables.
The org.apache.cassandra.tools.SSTableExport class provides a blue print for reading rows from disk. hope that helps. ----------------- Aaron Morton Freelance Cassandra Consultant New Zealand @aaronmorton http://www.thelastpickle.com On 13/04/2013, at 7:58 PM, Jasper K. <jasper.knu...@incentro.com> wrote: > Hi, > > Does anyone have any experience with running a MapReduce directly against a > CF's SSTable files? > > I have a use case where this seems to be an option. I want to export all data > from a CF to a flat file format for statistical analysis. > > Some factors that make it (more) doable in my case: > -The Cassandra instance is not 'on-line' (no writes- no reads) > -The .db files were exported from another instance. I got them all in one > place now > > The SSTable files are in the -f- format from 0.8.10. > > Looking at this : http://wiki.apache.org/cassandra/ArchitectureSSTable it > should be possible to write a Hadoop RecordReader for Cassandra rowkeys. > > But maybe I am not fully aware of what I am up to. > > -- > > Jasper
