Dave, How do you want this, copy pasted code into a gist or a reusable jar?
--victor On Wed, Feb 13, 2013 at 3:59 AM, Dave Beech <[email protected]> wrote: > Hi Victor, > Any chance you could share your implementation of a Source that reads > from multiple paths? I've wanted this for a while but haven't found > time to go ahead and write one myself! > Thanks, > Dave > > On 12 February 2013 23:07, Victor Iacoban <[email protected]> > wrote: > > Thanks J > > > > I could not extend the FileSourceImpl since it works with only one input > > path, > > but I implemented the Source interface directly and it appears to do the > > job, thx for the pointer > > > > -- victor > > > > > > > > On Tue, Feb 12, 2013 at 5:20 PM, Josh Wills <[email protected]> > wrote: > > > >> Yep-- check out the formattedFile function in o.a.c.io.From. You can > also > >> write a custom extension of o.a.c.io.impl.FileSourceImpl if it's one > you're > >> going to be using a lot, or if there is custom configuration information > >> required to use the InputFormat. > >> > >> J > >> > >> > >> On Tue, Feb 12, 2013 at 2:13 PM, Victor Iacoban < > [email protected] > >> >wrote: > >> > >> > That's exactly what I have in the code not using Crunch API: > >> > public class MultiSequenceFileInputFormat<K, V> extends > >> > CombineFileInputFormat<K, V> { > >> > ... > >> > } > >> > > >> > Are you saying there is way to use my custom input format with Crunch? > >> > > >> > > >> > > >> > On Tue, Feb 12, 2013 at 5:06 PM, Josh Wills <[email protected]> > >> wrote: > >> > > >> > > Depends on the size of the files-- if there are a bunch of tiny > ones, > >> it > >> > > can be worthwhile to have a CombineFileInputFormat, ala > >> > > > >> > > > http://yaseminavcular.blogspot.com/2011/03/many-small-input-files.html > >> > > > >> > > J > >> > > > >> > > > >> > > On Tue, Feb 12, 2013 at 1:56 PM, Victor Iacoban < > >> > [email protected] > >> > > >wrote: > >> > > > >> > > > Thanks Josh, > >> > > > Is there any performance penalty in unions, assuming that I have > >> > several > >> > > > hundreds of input files? > >> > > > > >> > > > > >> > > > On Tue, Feb 12, 2013 at 4:39 PM, Josh Wills <[email protected] > > > >> > > wrote: > >> > > > > >> > > > > Yeah, of course-- that's how stuff like joins work. > >> > > > > > >> > > > > PTable<K, V> first = pipeline.read(new TableSource<K, > >> V>(firstFile)); > >> > > > > PTable<K, V> second = ...; > >> > > > > PTable<K, V> union = first.union(second); > >> > > > > > >> > > > > etc. > >> > > > > > >> > > > > > >> > > > > On Tue, Feb 12, 2013 at 1:36 PM, Victor Iacoban < > >> > > > [email protected] > >> > > > > >wrote: > >> > > > > > >> > > > > > Is there any support in crunch to use multiple sequence files > as > >> > > > pipeline > >> > > > > > source? > >> > > > > > something similar to standard MultipleInputs > >> > > > > > > >> > > > > > Thanks, > >> > > > > > victor > >> > > > > > > >> > > > > > >> > > > > >> > > > >> > > >> >
