Is it possible to save the final output sorted by vertex id? My vertices have their id of type long, and I am using SequenceFileOutputFormat, where the key of the sequence file is the vertex id of type long. If the vertices were somehow written in sorted order, I could even switch to using Hadoop's MapFileOutputFormat, which expects sorted keys. I understand that if there are multiple workers, there won't be a total order on the keys, and that's fine. As long as each worker writes its output sorted by vertex id.
I was looking at the code and looks like the call to writeVertex is made in BspServiceWorker.saveVertices, Looks like there is no way to control the order of vertices, but I may be missing something. Any pointers or examples would help. Thanks, Ameet
