Comments (8)
Hi! Could you explain what you want to achieve?
from parquet4s.
Hi! I have some protobuf messages, that I would like to write to parquet files without having to map to intermediary classes nor derive schemas etc using the parquet4s typeclasses.
I am also usigng akka-streams, but I think thats an orthogonal concern...
from parquet4s.
So, regarding writing, AFAIR this writer is used internally in every place. In order to write from Protobuf we need to replace it with Protobuf version. Additionally, we won't use schema resolver but a Protobuf Message
.
If you want to add Protobuf support to Parquet4s - then it's fantastic. However, I would prefer not to add Protobuf dependencies to the existing artifacts. So I think that we can create a new module. With small changes to this class we could use a different internal writer and reuse it in protobuf module. Similarly, the same could happen in Akka Stream.
from parquet4s.
If you want to add Protobuf support to Parquet4s
I was evaluating parquet4s for a future project and if we end up using parquet this feature would be useful, and I will try to this.
However, I would prefer not to add Protobuf dependencies to the existing artifacts. So I think that we can create a new module
I was also thinking about that, like a parquet4s-protobuf
that depends on parquet-protobuf
. However do you think it would possible to make a change in parquet4s-core
so that a user can pass any Writer (for example AvroParquetWriter )
from parquet4s.
However do you think it would possible to make a change in parquet4s-core so that a user can pass any Writer
Yes, I think so, as long as backwards compatibility is kept.
from parquet4s.
Hi!
With small changes to this class we could use a different internal writer and reuse it in protobuf module.
It would be great. The ability to provide a custom writer could have a big value for those who prefer to bypass RowParquetRecord creation for performance reasons. In my case (schema with thousands of columns), this badly lowers GC pressure and boost overall write performance.
I suppose, as a next step, it's also possible to automatically derive a WriteSupport
instance for case classes.
from parquet4s.
I was evaluating parquet4s for a future project and if we end up using parquet this feature would be useful, and I will try to this.
The future project was delayed, so I am not working on this...
from parquet4s.
Thanks to @flipp5b, Parquet4s v2.10.0 supports writing Protobuf, or any kind of data supported by the original Java Parquet library, to a single file. Examples show how this can be achieved.
I wonder if a similar improvement could be introduced to viaParquet
, which has many more features.
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Related Issues (20)
- Add Pekko support HOT 4
- Is it possible to write a file without Akka or Fs2 integration? HOT 2
- `ParquetReader.projectedGeneric` does not work when selecting more than one column from a same group HOT 5
- Reading from gcs bucket HOT 1
- Do not publish a pekko/akko versions of scapapb module HOT 1
- missing tail records of large(~193M) parquet files HOT 4
- Protobuf enums deserialisation HOT 3
- compatible parquet-hadoop with spark3.1 HOT 3
- Unsure how to use for 'semiauto' approach HOT 2
- ParquetSchemaResolver test fails on recent JVMs HOT 1
- [akka/pekko] Too many paths created during record partitioning HOT 2
- [RFC] Refactor timestamp codecs HOT 2
- Feature request: Expose partitions as a `Stream[F, Stream[F, Record]]` for FS2 HOT 5
- Incorrect value after reading parquet HOT 7
- [Question] get a listing of parquet files? HOT 4
- [Question] Is there a mechanism to detect when the `rotatingWriter` finishes writing to a file and to be notified of the file that was written? HOT 1
- Support vectored io introduced in Parquet 1.14 HOT 1
- Efficent way to read big files? HOT 2
- Possiblity to write avro IndexedRecords to Parquet using ParquetStreams HOT 3
- feat(akkaPekko): Retry mechanism for ParquetPartitioningFlow HOT 3
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