On Fri, May 25, 2012 at 9:30 AM, Harsh J <ha...@cloudera.com> wrote: > Mohit, > > Not if you call sync (or hflush/hsync in 2.0) periodically to persist > your changes to the file. SequenceFile doesn't currently have a > sync-API inbuilt in it (in 1.0 at least), but you can call sync on the > underlying output stream instead at the moment. This is possible to do > in 1.0 (just own the output stream). > > Your use case also sounds like you may want to simply use Apache Flume > (Incubating) [http://incubator.apache.org/flume/] that already does > provide these features and the WAL-kinda reliability you seek. >
Thanks Harsh, Does flume also provides API on top. I am getting this data as http call, how would I go about using flume with http calls? > > On Fri, May 25, 2012 at 8:24 PM, Mohit Anchlia <mohitanch...@gmail.com> > wrote: > > We get click data through API calls. I now need to send this data to our > > hadoop environment. I am wondering if I could open one sequence file and > > write to it until it's of certain size. Once it's over the specified > size I > > can close that file and open a new one. Is this a good approach? > > > > Only thing I worry about is what happens if the server crashes before I > am > > able to cleanly close the file. Would I lose all previous data? > > > > -- > Harsh J >
