Re: [Python] Read Hadoop Sequence File?
I am still having the problem that local file system (DirectRunner) will
not allow a local GLOB string to be passed as a file source. I have tried
both relative path and fully qualified paths.
I can confirm the same inputFile source GLOB returns data on a simple cat
command. So I know the GLOB is good.
Error: "java.io.FileNotFoundException: No files matched spec:
/Users//github//io/sequenceFile/part-*/data
Any assistance would be greatly appreciated. This is on the Java SDK.
I tested this with TextIO.read().from(ValueProvider); Still the
same.
Thanks,
Shannon
On Fri, Jul 12, 2019 at 2:14 PM Igor Bernstein
wrote:
> I'm not sure to be honest. The pattern expansion happens in
> FileBasedSource via FileSystems.match(), so it should follow the same
> expansion rules other file based sinks like TextIO. Maybe someone with more
> beam experience can help?
>
> On Fri, Jul 12, 2019 at 2:55 PM Shannon Duncan
> wrote:
>
>> Clarification on previous message. Only happens on local file system
>> where it is unable to match a pattern string. Via a `gs://` link it
>> is able to do multiple file matching.
>>
>> On Fri, Jul 12, 2019 at 1:36 PM Shannon Duncan <
>> joseph.dun...@liveramp.com> wrote:
>>
>>> Awesome. I got it working for a single file, but for a structure of:
>>>
>>> /part-0001/index
>>> /part-0001/data
>>> /part-0002/index
>>> /part-0002/data
>>>
>>> I tried to do /part-* and /part-*/data
>>>
>>> It does not find the multipart files. However if I just do
>>> /part-0001/data it will find it and read it.
>>>
>>> Any ideas why?
>>>
>>> I am using this to generate the source:
>>>
>>> static SequenceFileSource createSource(
>>> ValueProvider sourcePattern) {
>>> return new SequenceFileSource(
>>> sourcePattern,
>>> Text.class,
>>> WritableSerialization.class,
>>> Text.class,
>>> WritableSerialization.class,
>>> SequenceFile.SYNC_INTERVAL);
>>> }
>>>
>>> On Wed, Jul 10, 2019 at 10:52 AM Igor Bernstein <
>>> igorbernst...@google.com> wrote:
>>>
It should be fairly straight forward:
1. Copy SequenceFileSource.java
to
your project
2. Add the source to your pipeline, configuring it with appropriate
serializers. See here
for an example for hbase Results
On Wed, Jul 10, 2019 at 10:58 AM Shannon Duncan <
joseph.dun...@liveramp.com> wrote:
> If I wanted to go ahead and include this within a new Java Pipeline,
> what would I be looking at for level of work to integrate?
>
> On Wed, Jul 3, 2019 at 3:54 AM Ismaël Mejía wrote:
>
>> That's great. I can help whenever you need. We just need to choose its
>> destination. Both the `hadoop-format` and `hadoop-file-system` modules
>> are good candidates, I would even feel inclined to put it in its own
>> module `sdks/java/extensions/sequencefile` to make it more easy to
>> discover by the final users.
>>
>> A thing to consider is the SeekableByteChannel adapters, we can move
>> that into hadoop-common if needed and refactor the modules to share
>> code. Worth to take a look at
>>
>> org.apache.beam.sdk.io.hdfs.HadoopFileSystem.HadoopSeekableByteChannel#HadoopSeekableByteChannel
>> to see if some of it could be useful.
>>
>> On Tue, Jul 2, 2019 at 11:46 PM Igor Bernstein <
>> igorbernst...@google.com> wrote:
>> >
>> > Hi all,
>> >
>> > I wrote those classes with the intention of upstreaming them to
>> Beam. I can try to make some time this quarter to clean them up. I would
>> need a bit of guidance from a beam expert in how to make them coexist
>> with
>> HadoopFormatIO though.
>> >
>> >
>> > On Tue, Jul 2, 2019 at 10:55 AM Solomon Duskis
>> wrote:
>> >>
>> >> +Igor Bernstein who wrote the Cloud Bigtable Sequence File classes.
>> >>
>> >> Solomon Duskis | Google Cloud clients | sdus...@google.com |
>> 914-462-0531
>> >>
>> >>
>> >> On Tue, Jul 2, 2019 at 4:57 AM Ismaël Mejía
>> wrote:
>> >>>
>> >>> (Adding dev@ and Solomon Duskis to the discussion)
>> >>>
>> >>> I was not aware of these thanks for sharing David. Definitely it
>> would
>> >>> be a great addition if we could have those donated as an
>> extension in
>> >>> the Beam side. We can even evolve them in the future to be more
>> FileIO
>> >>> like. Any chance this can happen? Maybe Solomon and his team?
>> >>>
>> >>>
>> >>>
>> >>> On Tue, Jul 2, 2019 at 9:39 AM David Morávek
>> wrote:
>> >>> >
>> >>> > Hi, you can use SequenceFileSink
Re: [Python] Read Hadoop Sequence File?
Clarification on previous message. Only happens on local file system where
it is unable to match a pattern string. Via a `gs://` link it is
able to do multiple file matching.
On Fri, Jul 12, 2019 at 1:36 PM Shannon Duncan
wrote:
> Awesome. I got it working for a single file, but for a structure of:
>
> /part-0001/index
> /part-0001/data
> /part-0002/index
> /part-0002/data
>
> I tried to do /part-* and /part-*/data
>
> It does not find the multipart files. However if I just do /part-0001/data
> it will find it and read it.
>
> Any ideas why?
>
> I am using this to generate the source:
>
> static SequenceFileSource createSource(
> ValueProvider sourcePattern) {
> return new SequenceFileSource(
> sourcePattern,
> Text.class,
> WritableSerialization.class,
> Text.class,
> WritableSerialization.class,
> SequenceFile.SYNC_INTERVAL);
> }
>
> On Wed, Jul 10, 2019 at 10:52 AM Igor Bernstein
> wrote:
>
>> It should be fairly straight forward:
>> 1. Copy SequenceFileSource.java
>>
>> to
>> your project
>> 2. Add the source to your pipeline, configuring it with appropriate
>> serializers. See here
>>
>> for an example for hbase Results
>>
>> On Wed, Jul 10, 2019 at 10:58 AM Shannon Duncan <
>> joseph.dun...@liveramp.com> wrote:
>>
>>> If I wanted to go ahead and include this within a new Java Pipeline,
>>> what would I be looking at for level of work to integrate?
>>>
>>> On Wed, Jul 3, 2019 at 3:54 AM Ismaël Mejía wrote:
>>>
That's great. I can help whenever you need. We just need to choose its
destination. Both the `hadoop-format` and `hadoop-file-system` modules
are good candidates, I would even feel inclined to put it in its own
module `sdks/java/extensions/sequencefile` to make it more easy to
discover by the final users.
A thing to consider is the SeekableByteChannel adapters, we can move
that into hadoop-common if needed and refactor the modules to share
code. Worth to take a look at
org.apache.beam.sdk.io.hdfs.HadoopFileSystem.HadoopSeekableByteChannel#HadoopSeekableByteChannel
to see if some of it could be useful.
On Tue, Jul 2, 2019 at 11:46 PM Igor Bernstein <
igorbernst...@google.com> wrote:
>
> Hi all,
>
> I wrote those classes with the intention of upstreaming them to Beam.
I can try to make some time this quarter to clean them up. I would need a
bit of guidance from a beam expert in how to make them coexist with
HadoopFormatIO though.
>
>
> On Tue, Jul 2, 2019 at 10:55 AM Solomon Duskis
wrote:
>>
>> +Igor Bernstein who wrote the Cloud Bigtable Sequence File classes.
>>
>> Solomon Duskis | Google Cloud clients | sdus...@google.com |
914-462-0531
>>
>>
>> On Tue, Jul 2, 2019 at 4:57 AM Ismaël Mejía
wrote:
>>>
>>> (Adding dev@ and Solomon Duskis to the discussion)
>>>
>>> I was not aware of these thanks for sharing David. Definitely it
would
>>> be a great addition if we could have those donated as an extension
in
>>> the Beam side. We can even evolve them in the future to be more
FileIO
>>> like. Any chance this can happen? Maybe Solomon and his team?
>>>
>>>
>>>
>>> On Tue, Jul 2, 2019 at 9:39 AM David Morávek
wrote:
>>> >
>>> > Hi, you can use SequenceFileSink and Source, from a BigTable
client. Those works nice with FileIO.
>>> >
>>> >
https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSink.java
>>> >
https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSource.java
>>> >
>>> > It would be really cool to move these into Beam, but that's up to
Googlers to decide, whether they want to donate this.
>>> >
>>> > D.
>>> >
>>> > On Tue, Jul 2, 2019 at 2:07 AM Shannon Duncan <
joseph.dun...@liveramp.com> wrote:
>>> >>
>>> >> It's not outside the realm of possibilities. For now I've
created an intermediary step of a hadoop job that converts from sequence to
text file.
>>> >>
>>> >> Looking into better options.
>>> >>
>>> >> On Mon, Jul 1, 2019, 5:50 PM Chamikara Jayalath <
chamik...@google.com> wrote:
>>> >>>
>>> >>> Java SDK has a HadoopInputFormatIO using which you should be
able
Re: [Python] Read Hadoop Sequence File?
Awesome. I got it working for a single file, but for a structure of:
/part-0001/index
/part-0001/data
/part-0002/index
/part-0002/data
I tried to do /part-* and /part-*/data
It does not find the multipart files. However if I just do /part-0001/data
it will find it and read it.
Any ideas why?
I am using this to generate the source:
static SequenceFileSource createSource(
ValueProvider sourcePattern) {
return new SequenceFileSource(
sourcePattern,
Text.class,
WritableSerialization.class,
Text.class,
WritableSerialization.class,
SequenceFile.SYNC_INTERVAL);
}
On Wed, Jul 10, 2019 at 10:52 AM Igor Bernstein
wrote:
> It should be fairly straight forward:
> 1. Copy SequenceFileSource.java
>
> to
> your project
> 2. Add the source to your pipeline, configuring it with appropriate
> serializers. See here
>
> for an example for hbase Results
>
> On Wed, Jul 10, 2019 at 10:58 AM Shannon Duncan <
> joseph.dun...@liveramp.com> wrote:
>
>> If I wanted to go ahead and include this within a new Java Pipeline, what
>> would I be looking at for level of work to integrate?
>>
>> On Wed, Jul 3, 2019 at 3:54 AM Ismaël Mejía wrote:
>>
>>> That's great. I can help whenever you need. We just need to choose its
>>> destination. Both the `hadoop-format` and `hadoop-file-system` modules
>>> are good candidates, I would even feel inclined to put it in its own
>>> module `sdks/java/extensions/sequencefile` to make it more easy to
>>> discover by the final users.
>>>
>>> A thing to consider is the SeekableByteChannel adapters, we can move
>>> that into hadoop-common if needed and refactor the modules to share
>>> code. Worth to take a look at
>>>
>>> org.apache.beam.sdk.io.hdfs.HadoopFileSystem.HadoopSeekableByteChannel#HadoopSeekableByteChannel
>>> to see if some of it could be useful.
>>>
>>> On Tue, Jul 2, 2019 at 11:46 PM Igor Bernstein
>>> wrote:
>>> >
>>> > Hi all,
>>> >
>>> > I wrote those classes with the intention of upstreaming them to Beam.
>>> I can try to make some time this quarter to clean them up. I would need a
>>> bit of guidance from a beam expert in how to make them coexist with
>>> HadoopFormatIO though.
>>> >
>>> >
>>> > On Tue, Jul 2, 2019 at 10:55 AM Solomon Duskis
>>> wrote:
>>> >>
>>> >> +Igor Bernstein who wrote the Cloud Bigtable Sequence File classes.
>>> >>
>>> >> Solomon Duskis | Google Cloud clients | sdus...@google.com |
>>> 914-462-0531
>>> >>
>>> >>
>>> >> On Tue, Jul 2, 2019 at 4:57 AM Ismaël Mejía
>>> wrote:
>>> >>>
>>> >>> (Adding dev@ and Solomon Duskis to the discussion)
>>> >>>
>>> >>> I was not aware of these thanks for sharing David. Definitely it
>>> would
>>> >>> be a great addition if we could have those donated as an extension in
>>> >>> the Beam side. We can even evolve them in the future to be more
>>> FileIO
>>> >>> like. Any chance this can happen? Maybe Solomon and his team?
>>> >>>
>>> >>>
>>> >>>
>>> >>> On Tue, Jul 2, 2019 at 9:39 AM David Morávek
>>> wrote:
>>> >>> >
>>> >>> > Hi, you can use SequenceFileSink and Source, from a BigTable
>>> client. Those works nice with FileIO.
>>> >>> >
>>> >>> >
>>> https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSink.java
>>> >>> >
>>> https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSource.java
>>> >>> >
>>> >>> > It would be really cool to move these into Beam, but that's up to
>>> Googlers to decide, whether they want to donate this.
>>> >>> >
>>> >>> > D.
>>> >>> >
>>> >>> > On Tue, Jul 2, 2019 at 2:07 AM Shannon Duncan <
>>> joseph.dun...@liveramp.com> wrote:
>>> >>> >>
>>> >>> >> It's not outside the realm of possibilities. For now I've created
>>> an intermediary step of a hadoop job that converts from sequence to text
>>> file.
>>> >>> >>
>>> >>> >> Looking into better options.
>>> >>> >>
>>> >>> >> On Mon, Jul 1, 2019, 5:50 PM Chamikara Jayalath <
>>> chamik...@google.com> wrote:
>>> >>> >>>
>>> >>> >>> Java SDK has a HadoopInputFormatIO using which you should be
>>> able to read Sequence files:
>>> https://github.com/apache/beam/blob/master/sdks/java/io/hadoop-format/src/main/java/org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.java
>>> >>> >>> I don't think there's a direct alternative for this for Python.
>>> >>> >>>
>>> >>> >>> Is it possible to write to a well-known format such as Avro
>>> instead of a Hadoop specific format which will allow you to read from both
Re: [Python] Read Hadoop Sequence File?
If I wanted to go ahead and include this within a new Java Pipeline, what would I be looking at for level of work to integrate? On Wed, Jul 3, 2019 at 3:54 AM Ismaël Mejía wrote: > That's great. I can help whenever you need. We just need to choose its > destination. Both the `hadoop-format` and `hadoop-file-system` modules > are good candidates, I would even feel inclined to put it in its own > module `sdks/java/extensions/sequencefile` to make it more easy to > discover by the final users. > > A thing to consider is the SeekableByteChannel adapters, we can move > that into hadoop-common if needed and refactor the modules to share > code. Worth to take a look at > > org.apache.beam.sdk.io.hdfs.HadoopFileSystem.HadoopSeekableByteChannel#HadoopSeekableByteChannel > to see if some of it could be useful. > > On Tue, Jul 2, 2019 at 11:46 PM Igor Bernstein > wrote: > > > > Hi all, > > > > I wrote those classes with the intention of upstreaming them to Beam. I > can try to make some time this quarter to clean them up. I would need a bit > of guidance from a beam expert in how to make them coexist with > HadoopFormatIO though. > > > > > > On Tue, Jul 2, 2019 at 10:55 AM Solomon Duskis > wrote: > >> > >> +Igor Bernstein who wrote the Cloud Bigtable Sequence File classes. > >> > >> Solomon Duskis | Google Cloud clients | sdus...@google.com | > 914-462-0531 > >> > >> > >> On Tue, Jul 2, 2019 at 4:57 AM Ismaël Mejía wrote: > >>> > >>> (Adding dev@ and Solomon Duskis to the discussion) > >>> > >>> I was not aware of these thanks for sharing David. Definitely it would > >>> be a great addition if we could have those donated as an extension in > >>> the Beam side. We can even evolve them in the future to be more FileIO > >>> like. Any chance this can happen? Maybe Solomon and his team? > >>> > >>> > >>> > >>> On Tue, Jul 2, 2019 at 9:39 AM David Morávek wrote: > >>> > > >>> > Hi, you can use SequenceFileSink and Source, from a BigTable client. > Those works nice with FileIO. > >>> > > >>> > > https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSink.java > >>> > > https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSource.java > >>> > > >>> > It would be really cool to move these into Beam, but that's up to > Googlers to decide, whether they want to donate this. > >>> > > >>> > D. > >>> > > >>> > On Tue, Jul 2, 2019 at 2:07 AM Shannon Duncan < > joseph.dun...@liveramp.com> wrote: > >>> >> > >>> >> It's not outside the realm of possibilities. For now I've created > an intermediary step of a hadoop job that converts from sequence to text > file. > >>> >> > >>> >> Looking into better options. > >>> >> > >>> >> On Mon, Jul 1, 2019, 5:50 PM Chamikara Jayalath < > chamik...@google.com> wrote: > >>> >>> > >>> >>> Java SDK has a HadoopInputFormatIO using which you should be able > to read Sequence files: > https://github.com/apache/beam/blob/master/sdks/java/io/hadoop-format/src/main/java/org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.java > >>> >>> I don't think there's a direct alternative for this for Python. > >>> >>> > >>> >>> Is it possible to write to a well-known format such as Avro > instead of a Hadoop specific format which will allow you to read from both > Dataproc/Hadoop and Beam Python SDK ? > >>> >>> > >>> >>> Thanks, > >>> >>> Cham > >>> >>> > >>> >>> On Mon, Jul 1, 2019 at 3:37 PM Shannon Duncan < > joseph.dun...@liveramp.com> wrote: > >>> > >>> That's a pretty big hole for a missing source/sink when looking > at transitioning from Dataproc to Dataflow using GCS as storage buffer > instead of a traditional hdfs. > >>> > >>> From what I've been able to tell from source code and > documentation, Java is able to but not Python? > >>> > >>> Thanks, > >>> Shannon > >>> > >>> On Mon, Jul 1, 2019 at 5:29 PM Chamikara Jayalath < > chamik...@google.com> wrote: > >>> > > >>> > I don't think we have a source/sink for reading Hadoop sequence > files. Your best bet currently will probably be to use FileSystem > abstraction to create a file from a ParDo and read directly from there > using a library that can read sequence files. > >>> > > >>> > Thanks, > >>> > Cham > >>> > > >>> > On Mon, Jul 1, 2019 at 8:42 AM Shannon Duncan < > joseph.dun...@liveramp.com> wrote: > >>> >> > >>> >> I'm wanting to read a Sequence/Map file from Hadoop stored on > Google Cloud Storage via a " gs://bucket/link/SequenceFile-* " via the > Python SDK. > >>> >> > >>> >> I cannot locate any good adapters for this, and the one Hadoop > Filesystem reader seems to only read from a "hdfs://" url. > >>> >> > >>> >> I'm wanting to use Dataflow and GCS exclusively to start mixing > in Beam
Re: [Python] Read Hadoop Sequence File?
That's great. I can help whenever you need. We just need to choose its destination. Both the `hadoop-format` and `hadoop-file-system` modules are good candidates, I would even feel inclined to put it in its own module `sdks/java/extensions/sequencefile` to make it more easy to discover by the final users. A thing to consider is the SeekableByteChannel adapters, we can move that into hadoop-common if needed and refactor the modules to share code. Worth to take a look at org.apache.beam.sdk.io.hdfs.HadoopFileSystem.HadoopSeekableByteChannel#HadoopSeekableByteChannel to see if some of it could be useful. On Tue, Jul 2, 2019 at 11:46 PM Igor Bernstein wrote: > > Hi all, > > I wrote those classes with the intention of upstreaming them to Beam. I can > try to make some time this quarter to clean them up. I would need a bit of > guidance from a beam expert in how to make them coexist with HadoopFormatIO > though. > > > On Tue, Jul 2, 2019 at 10:55 AM Solomon Duskis wrote: >> >> +Igor Bernstein who wrote the Cloud Bigtable Sequence File classes. >> >> Solomon Duskis | Google Cloud clients | sdus...@google.com | 914-462-0531 >> >> >> On Tue, Jul 2, 2019 at 4:57 AM Ismaël Mejía wrote: >>> >>> (Adding dev@ and Solomon Duskis to the discussion) >>> >>> I was not aware of these thanks for sharing David. Definitely it would >>> be a great addition if we could have those donated as an extension in >>> the Beam side. We can even evolve them in the future to be more FileIO >>> like. Any chance this can happen? Maybe Solomon and his team? >>> >>> >>> >>> On Tue, Jul 2, 2019 at 9:39 AM David Morávek wrote: >>> > >>> > Hi, you can use SequenceFileSink and Source, from a BigTable client. >>> > Those works nice with FileIO. >>> > >>> > https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSink.java >>> > https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSource.java >>> > >>> > It would be really cool to move these into Beam, but that's up to >>> > Googlers to decide, whether they want to donate this. >>> > >>> > D. >>> > >>> > On Tue, Jul 2, 2019 at 2:07 AM Shannon Duncan >>> > wrote: >>> >> >>> >> It's not outside the realm of possibilities. For now I've created an >>> >> intermediary step of a hadoop job that converts from sequence to text >>> >> file. >>> >> >>> >> Looking into better options. >>> >> >>> >> On Mon, Jul 1, 2019, 5:50 PM Chamikara Jayalath >>> >> wrote: >>> >>> >>> >>> Java SDK has a HadoopInputFormatIO using which you should be able to >>> >>> read Sequence files: >>> >>> https://github.com/apache/beam/blob/master/sdks/java/io/hadoop-format/src/main/java/org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.java >>> >>> I don't think there's a direct alternative for this for Python. >>> >>> >>> >>> Is it possible to write to a well-known format such as Avro instead of >>> >>> a Hadoop specific format which will allow you to read from both >>> >>> Dataproc/Hadoop and Beam Python SDK ? >>> >>> >>> >>> Thanks, >>> >>> Cham >>> >>> >>> >>> On Mon, Jul 1, 2019 at 3:37 PM Shannon Duncan >>> >>> wrote: >>> >>> That's a pretty big hole for a missing source/sink when looking at >>> transitioning from Dataproc to Dataflow using GCS as storage buffer >>> instead of a traditional hdfs. >>> >>> From what I've been able to tell from source code and documentation, >>> Java is able to but not Python? >>> >>> Thanks, >>> Shannon >>> >>> On Mon, Jul 1, 2019 at 5:29 PM Chamikara Jayalath >>> wrote: >>> > >>> > I don't think we have a source/sink for reading Hadoop sequence >>> > files. Your best bet currently will probably be to use FileSystem >>> > abstraction to create a file from a ParDo and read directly from >>> > there using a library that can read sequence files. >>> > >>> > Thanks, >>> > Cham >>> > >>> > On Mon, Jul 1, 2019 at 8:42 AM Shannon Duncan >>> > wrote: >>> >> >>> >> I'm wanting to read a Sequence/Map file from Hadoop stored on Google >>> >> Cloud Storage via a " gs://bucket/link/SequenceFile-* " via the >>> >> Python SDK. >>> >> >>> >> I cannot locate any good adapters for this, and the one Hadoop >>> >> Filesystem reader seems to only read from a "hdfs://" url. >>> >> >>> >> I'm wanting to use Dataflow and GCS exclusively to start mixing in >>> >> Beam pipelines with our current Hadoop Pipelines. >>> >> >>> >> Is this a feature that is supported or will be supported in the >>> >> future? >>> >> Does anyone have any good suggestions for this that is performant? >>> >> >>> >> I'd also like to be able to write back out to a SequenceFile if >>> >>
Re: [Python] Read Hadoop Sequence File?
(Adding dev@ and Solomon Duskis to the discussion) I was not aware of these thanks for sharing David. Definitely it would be a great addition if we could have those donated as an extension in the Beam side. We can even evolve them in the future to be more FileIO like. Any chance this can happen? Maybe Solomon and his team? On Tue, Jul 2, 2019 at 9:39 AM David Morávek wrote: > > Hi, you can use SequenceFileSink and Source, from a BigTable client. Those > works nice with FileIO. > > https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSink.java > https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSource.java > > It would be really cool to move these into Beam, but that's up to Googlers to > decide, whether they want to donate this. > > D. > > On Tue, Jul 2, 2019 at 2:07 AM Shannon Duncan > wrote: >> >> It's not outside the realm of possibilities. For now I've created an >> intermediary step of a hadoop job that converts from sequence to text file. >> >> Looking into better options. >> >> On Mon, Jul 1, 2019, 5:50 PM Chamikara Jayalath wrote: >>> >>> Java SDK has a HadoopInputFormatIO using which you should be able to read >>> Sequence files: >>> https://github.com/apache/beam/blob/master/sdks/java/io/hadoop-format/src/main/java/org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.java >>> I don't think there's a direct alternative for this for Python. >>> >>> Is it possible to write to a well-known format such as Avro instead of a >>> Hadoop specific format which will allow you to read from both >>> Dataproc/Hadoop and Beam Python SDK ? >>> >>> Thanks, >>> Cham >>> >>> On Mon, Jul 1, 2019 at 3:37 PM Shannon Duncan >>> wrote: That's a pretty big hole for a missing source/sink when looking at transitioning from Dataproc to Dataflow using GCS as storage buffer instead of a traditional hdfs. From what I've been able to tell from source code and documentation, Java is able to but not Python? Thanks, Shannon On Mon, Jul 1, 2019 at 5:29 PM Chamikara Jayalath wrote: > > I don't think we have a source/sink for reading Hadoop sequence files. > Your best bet currently will probably be to use FileSystem abstraction to > create a file from a ParDo and read directly from there using a library > that can read sequence files. > > Thanks, > Cham > > On Mon, Jul 1, 2019 at 8:42 AM Shannon Duncan > wrote: >> >> I'm wanting to read a Sequence/Map file from Hadoop stored on Google >> Cloud Storage via a " gs://bucket/link/SequenceFile-* " via the Python >> SDK. >> >> I cannot locate any good adapters for this, and the one Hadoop >> Filesystem reader seems to only read from a "hdfs://" url. >> >> I'm wanting to use Dataflow and GCS exclusively to start mixing in Beam >> pipelines with our current Hadoop Pipelines. >> >> Is this a feature that is supported or will be supported in the future? >> Does anyone have any good suggestions for this that is performant? >> >> I'd also like to be able to write back out to a SequenceFile if possible. >> >> Thanks! >>
Re: [Python] Read Hadoop Sequence File?
Hi, you can use SequenceFileSink and Source, from a BigTable client. Those works nice with FileIO. https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSink.java https://github.com/googleapis/cloud-bigtable-client/blob/master/bigtable-dataflow-parent/bigtable-beam-import/src/main/java/com/google/cloud/bigtable/beam/sequencefiles/SequenceFileSource.java It would be really cool to move these into Beam, but that's up to Googlers to decide, whether they want to donate this. D. On Tue, Jul 2, 2019 at 2:07 AM Shannon Duncan wrote: > It's not outside the realm of possibilities. For now I've created an > intermediary step of a hadoop job that converts from sequence to text file. > > Looking into better options. > > On Mon, Jul 1, 2019, 5:50 PM Chamikara Jayalath > wrote: > >> Java SDK has a HadoopInputFormatIO using which you should be able to read >> Sequence files: >> https://github.com/apache/beam/blob/master/sdks/java/io/hadoop-format/src/main/java/org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.java >> I don't think there's a direct alternative for this for Python. >> >> Is it possible to write to a well-known format such as Avro instead of a >> Hadoop specific format which will allow you to read from both >> Dataproc/Hadoop and Beam Python SDK ? >> >> Thanks, >> Cham >> >> On Mon, Jul 1, 2019 at 3:37 PM Shannon Duncan >> wrote: >> >>> That's a pretty big hole for a missing source/sink when looking at >>> transitioning from Dataproc to Dataflow using GCS as storage buffer instead >>> of a traditional hdfs. >>> >>> From what I've been able to tell from source code and documentation, >>> Java is able to but not Python? >>> >>> Thanks, >>> Shannon >>> >>> On Mon, Jul 1, 2019 at 5:29 PM Chamikara Jayalath >>> wrote: >>> I don't think we have a source/sink for reading Hadoop sequence files. Your best bet currently will probably be to use FileSystem abstraction to create a file from a ParDo and read directly from there using a library that can read sequence files. Thanks, Cham On Mon, Jul 1, 2019 at 8:42 AM Shannon Duncan < joseph.dun...@liveramp.com> wrote: > I'm wanting to read a Sequence/Map file from Hadoop stored on Google > Cloud Storage via a " gs://bucket/link/SequenceFile-* " via the Python > SDK. > > I cannot locate any good adapters for this, and the one Hadoop > Filesystem reader seems to only read from a "hdfs://" url. > > I'm wanting to use Dataflow and GCS exclusively to start mixing in > Beam pipelines with our current Hadoop Pipelines. > > Is this a feature that is supported or will be supported in the future? > Does anyone have any good suggestions for this that is performant? > > I'd also like to be able to write back out to a SequenceFile if > possible. > > Thanks! > >
Re: [Python] Read Hadoop Sequence File?
It's not outside the realm of possibilities. For now I've created an intermediary step of a hadoop job that converts from sequence to text file. Looking into better options. On Mon, Jul 1, 2019, 5:50 PM Chamikara Jayalath wrote: > Java SDK has a HadoopInputFormatIO using which you should be able to read > Sequence files: > https://github.com/apache/beam/blob/master/sdks/java/io/hadoop-format/src/main/java/org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.java > I don't think there's a direct alternative for this for Python. > > Is it possible to write to a well-known format such as Avro instead of a > Hadoop specific format which will allow you to read from both > Dataproc/Hadoop and Beam Python SDK ? > > Thanks, > Cham > > On Mon, Jul 1, 2019 at 3:37 PM Shannon Duncan > wrote: > >> That's a pretty big hole for a missing source/sink when looking at >> transitioning from Dataproc to Dataflow using GCS as storage buffer instead >> of a traditional hdfs. >> >> From what I've been able to tell from source code and documentation, Java >> is able to but not Python? >> >> Thanks, >> Shannon >> >> On Mon, Jul 1, 2019 at 5:29 PM Chamikara Jayalath >> wrote: >> >>> I don't think we have a source/sink for reading Hadoop sequence files. >>> Your best bet currently will probably be to use FileSystem abstraction to >>> create a file from a ParDo and read directly from there using a library >>> that can read sequence files. >>> >>> Thanks, >>> Cham >>> >>> On Mon, Jul 1, 2019 at 8:42 AM Shannon Duncan < >>> joseph.dun...@liveramp.com> wrote: >>> I'm wanting to read a Sequence/Map file from Hadoop stored on Google Cloud Storage via a " gs://bucket/link/SequenceFile-* " via the Python SDK. I cannot locate any good adapters for this, and the one Hadoop Filesystem reader seems to only read from a "hdfs://" url. I'm wanting to use Dataflow and GCS exclusively to start mixing in Beam pipelines with our current Hadoop Pipelines. Is this a feature that is supported or will be supported in the future? Does anyone have any good suggestions for this that is performant? I'd also like to be able to write back out to a SequenceFile if possible. Thanks!
Re: [Python] Read Hadoop Sequence File?
Java SDK has a HadoopInputFormatIO using which you should be able to read Sequence files: https://github.com/apache/beam/blob/master/sdks/java/io/hadoop-format/src/main/java/org/apache/beam/sdk/io/hadoop/format/HadoopFormatIO.java I don't think there's a direct alternative for this for Python. Is it possible to write to a well-known format such as Avro instead of a Hadoop specific format which will allow you to read from both Dataproc/Hadoop and Beam Python SDK ? Thanks, Cham On Mon, Jul 1, 2019 at 3:37 PM Shannon Duncan wrote: > That's a pretty big hole for a missing source/sink when looking at > transitioning from Dataproc to Dataflow using GCS as storage buffer instead > of a traditional hdfs. > > From what I've been able to tell from source code and documentation, Java > is able to but not Python? > > Thanks, > Shannon > > On Mon, Jul 1, 2019 at 5:29 PM Chamikara Jayalath > wrote: > >> I don't think we have a source/sink for reading Hadoop sequence files. >> Your best bet currently will probably be to use FileSystem abstraction to >> create a file from a ParDo and read directly from there using a library >> that can read sequence files. >> >> Thanks, >> Cham >> >> On Mon, Jul 1, 2019 at 8:42 AM Shannon Duncan >> wrote: >> >>> I'm wanting to read a Sequence/Map file from Hadoop stored on Google >>> Cloud Storage via a " gs://bucket/link/SequenceFile-* " via the Python SDK. >>> >>> I cannot locate any good adapters for this, and the one Hadoop >>> Filesystem reader seems to only read from a "hdfs://" url. >>> >>> I'm wanting to use Dataflow and GCS exclusively to start mixing in Beam >>> pipelines with our current Hadoop Pipelines. >>> >>> Is this a feature that is supported or will be supported in the future? >>> Does anyone have any good suggestions for this that is performant? >>> >>> I'd also like to be able to write back out to a SequenceFile if possible. >>> >>> Thanks! >>> >>>
Re: [Python] Read Hadoop Sequence File?
That's a pretty big hole for a missing source/sink when looking at transitioning from Dataproc to Dataflow using GCS as storage buffer instead of a traditional hdfs. >From what I've been able to tell from source code and documentation, Java is able to but not Python? Thanks, Shannon On Mon, Jul 1, 2019 at 5:29 PM Chamikara Jayalath wrote: > I don't think we have a source/sink for reading Hadoop sequence files. > Your best bet currently will probably be to use FileSystem abstraction to > create a file from a ParDo and read directly from there using a library > that can read sequence files. > > Thanks, > Cham > > On Mon, Jul 1, 2019 at 8:42 AM Shannon Duncan > wrote: > >> I'm wanting to read a Sequence/Map file from Hadoop stored on Google >> Cloud Storage via a " gs://bucket/link/SequenceFile-* " via the Python SDK. >> >> I cannot locate any good adapters for this, and the one Hadoop Filesystem >> reader seems to only read from a "hdfs://" url. >> >> I'm wanting to use Dataflow and GCS exclusively to start mixing in Beam >> pipelines with our current Hadoop Pipelines. >> >> Is this a feature that is supported or will be supported in the future? >> Does anyone have any good suggestions for this that is performant? >> >> I'd also like to be able to write back out to a SequenceFile if possible. >> >> Thanks! >> >>
Re: [Python] Read Hadoop Sequence File?
I don't think we have a source/sink for reading Hadoop sequence files. Your best bet currently will probably be to use FileSystem abstraction to create a file from a ParDo and read directly from there using a library that can read sequence files. Thanks, Cham On Mon, Jul 1, 2019 at 8:42 AM Shannon Duncan wrote: > I'm wanting to read a Sequence/Map file from Hadoop stored on Google Cloud > Storage via a " gs://bucket/link/SequenceFile-* " via the Python SDK. > > I cannot locate any good adapters for this, and the one Hadoop Filesystem > reader seems to only read from a "hdfs://" url. > > I'm wanting to use Dataflow and GCS exclusively to start mixing in Beam > pipelines with our current Hadoop Pipelines. > > Is this a feature that is supported or will be supported in the future? > Does anyone have any good suggestions for this that is performant? > > I'd also like to be able to write back out to a SequenceFile if possible. > > Thanks! > >
[Python] Read Hadoop Sequence File?
I'm wanting to read a Sequence/Map file from Hadoop stored on Google Cloud Storage via a " gs://bucket/link/SequenceFile-* " via the Python SDK. I cannot locate any good adapters for this, and the one Hadoop Filesystem reader seems to only read from a "hdfs://" url. I'm wanting to use Dataflow and GCS exclusively to start mixing in Beam pipelines with our current Hadoop Pipelines. Is this a feature that is supported or will be supported in the future? Does anyone have any good suggestions for this that is performant? I'd also like to be able to write back out to a SequenceFile if possible. Thanks!
