([email protected]) Impala mostly relies on the S3A connector which provides an HDFS-compatible interface to S3. So a lot of the filesystem interactions are handled via that layer of indirection, and don't seem specific to S3.
In the backend you can see the times that we do special-case S3 by searching for "IsS3APath". In the frontend, try searching for "S3AFileSystem". On 14 December 2016 at 21:07, 黄志 <[email protected]> wrote: > I see it!Thanks,I want to know how Impala uses S3, I did't see the code in > Impala about choosing s3 and invoke s3's API > > 在 2016年12月14日星期三 UTC+8下午11:47:33，Tim Armstrong写道： >> >> See https://wiki.apache.org/hadoop/AmazonS3 and S3AFilesystem.java in >> the Hadoop source tree. >> >> It looks like Alluxio also has a similar filesystem implementation. I >> don't know anything about Alluxio or how well it works in practce, just >> giving pointers in case you are interested in developing the support. >> >> On Tue, Dec 13, 2016 at 10:01 PM, 黄志 <[email protected]> wrote: >> >>> Hi, I am interested in this, I saw Impala use boto3 to implement >>> S3Client, but Alluxio only offer Java API,how do we use it?and where is >>> S3AFileSystem? >>> >>> 在 2016年12月9日星期五 UTC+8上午1:34:42，Tim Armstrong写道： >>>> >>>> It looks like Alluxio provides some kind of Hadoop Filesystem API >>>> wrapper: http://www.alluxio.org/docs/master/en/File-System- >>>> API.html#hadoop-api. I don't know if it's been upstreamed into Apache >>>> Hadoop. >>>> >>>> We do use similar Hadoop Filesystem API adapters to provide S3 and >>>> Isilon support without massive code changes so it seems likely that it's >>>> possible to do the same for Alluxio. Our experience with S3 and Isilon was >>>> that it required additional work to get it to work and perform well because >>>> different filesystems have different quirks even if they implement the same >>>> interface. >>>> >>>> It would require at least some small code changes to switch it on (e.g. >>>> you can grep for S3AFilesystem to see how we turned on S3 support). Please >>>> let us know if you experiment with it and have any success (or no success). >>>> >>>> - Tim >>>> >>>> On Thu, Dec 8, 2016 at 9:07 AM, Jim Apple <[email protected]> wrote: >>>> >>>>> I don't know that Impala has been tested with Alluxio. >>>>> >>>>> This mailing list is deprecated; please use >>>>> [email protected] >>>>> >>>>> >>>>> On Wednesday, December 7, 2016 at 11:08:59 PM UTC-8, >>>>> [email protected] wrote: >>>>>> >>>>>> Hi >>>>>> How are you configure the impala on the alluxio; >>>>>> >>>>>> Alluxio: Open Source Memory Speed Virtual Distributed Storage >>>>>> Alluxio: http://alluxio.org/ >>>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Impala Dev" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> >>>> >>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Impala Dev" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> >> >> -- > You received this message because you are subscribed to the Google Groups > "Impala Dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > -- Henry Robinson Software Engineer Cloudera 415-994-6679
