CODEWITHSUNDEEP
jsonscalaapache-sparkamazon-s3filesystems
Learner
Learner

Reputation: 35

Spark :How to generate file path to read from s3 with scala

How do I generate and load multiple s3 file path in scala so that I can use :

   sqlContext.read.json ("s3://..../*/*/*")

I know I can use wildcards to read multiple files but is there any way so that I can generate the path ? For example my fIle structure looks like this: BucketName/year/month/day/files

       s3://testBucket/2016/10/16/part00000

These files are all jsons. The issue is I need to load just spacific duration of files, for eg. Say 16 days then I need to loado files for start day ( oct 16) : oct 1 to 16.

With 28 day duration for same start day I would like to read from Sep 18

Can some tell me any ways to do this ?

Upvotes: 1

Views: 3618

Answers (2)

Pawan B
Pawan B

Reputation: 4623

You can take a look at this answer, You can specify whole directories, use wildcards and even CSV of directories and wildcards. E.g.:

sc.textFile("/my/dir1,/my/paths/part-00[0-5]*,/another/dir,/a/specific/file")

Or you can use AWS API to get the list of files locations and read those files using spark .

You can look into this answer to AWS S3 file search.

Upvotes: 1

Igor Berman
Igor Berman

Reputation: 1532

You can generate comma separated path list: sqlContext.read.json (s3://testBucket/2016/10/16/,s3://testBucket/2016/10/15/,...);

Upvotes: 0

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