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wesm pushed a commit to branch master
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The following commit(s) were added to refs/heads/master by this push:
new 39243ff ARROW-1409: [Format] Remove page id from Buffer metadata,
increment metadata version number
39243ff is described below
commit 39243ffaf5eb1d1f2a748ea1ec2b36658ba7f3d7
Author: Wes McKinney <wes.mckin...@twosigma.com>
AuthorDate: Mon Oct 30 14:59:47 2017 -0400
ARROW-1409: [Format] Remove page id from Buffer metadata, increment
metadata version number
This is a breaking metadata change per discussion on the mailing list. I
expect this kind of truly breaking changes to be exceedingly rare going
forward, and when we make a 1.0.0 release we should document expectations
around metadata / memory format stability.
This could be made backwards compatible with some effort (we would have to
add `RecordBatchV3` and `BufferV3` types).
Author: Wes McKinney <wes.mckin...@twosigma.com>
Closes #1225 from wesm/ARROW-1409 and squashes the following commits:
582fad90 [Wes McKinney] Disable JS in Travis CI for now
845f290f [Wes McKinney] Bump metadata version in Java, add check for V4
e2150c19 [Wes McKinney] Remove page id from Buffer metadata, increment
metadata version number
---
.travis.yml | 15 +++++++------
cpp/src/arrow/ipc/ipc-read-write-test.cc | 2 +-
cpp/src/arrow/ipc/message.cc | 15 +------------
cpp/src/arrow/ipc/message.h | 14 +++++++++++-
cpp/src/arrow/ipc/metadata-internal.cc | 25 ++++++++++++++++++++--
cpp/src/arrow/ipc/metadata-internal.h | 10 ++++-----
cpp/src/arrow/ipc/reader.cc | 15 +------------
cpp/src/arrow/ipc/writer.cc | 12 +----------
format/Schema.fbs | 14 +++++++-----
.../apache/arrow/vector/schema/ArrowBuffer.java | 16 +++-----------
.../arrow/vector/schema/ArrowRecordBatch.java | 2 +-
.../arrow/vector/stream/MessageSerializer.java | 6 +++++-
js/src/format/Schema_generated.ts | 20 ++++-------------
13 files changed, 75 insertions(+), 91 deletions(-)
diff --git a/.travis.yml b/.travis.yml
index 6419548..52d7a5f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -112,13 +112,14 @@ matrix:
- $TRAVIS_BUILD_DIR/ci/travis_before_script_cpp.sh
script:
- $TRAVIS_BUILD_DIR/ci/travis_script_integration.sh
- - language: node_js
- os: linux
- node_js: node
- before_script:
- - $TRAVIS_BUILD_DIR/ci/travis_before_script_js.sh
- script:
- - $TRAVIS_BUILD_DIR/ci/travis_script_js.sh
+ # TODO(wesm): Re-enable after issues in ARROW-1409 resolved
+ # - language: node_js
+ # os: linux
+ # node_js: node
+ # before_script:
+ # - $TRAVIS_BUILD_DIR/ci/travis_before_script_js.sh
+ # script:
+ # - $TRAVIS_BUILD_DIR/ci/travis_script_js.sh
- compiler: gcc
language: cpp
os: linux
diff --git a/cpp/src/arrow/ipc/ipc-read-write-test.cc
b/cpp/src/arrow/ipc/ipc-read-write-test.cc
index adf34a9..6f2f5cf 100644
--- a/cpp/src/arrow/ipc/ipc-read-write-test.cc
+++ b/cpp/src/arrow/ipc/ipc-read-write-test.cc
@@ -243,7 +243,7 @@ TEST_F(TestIpcRoundTrip, MetadataVersion) {
std::unique_ptr<Message> message;
ASSERT_OK(ReadMessage(0, metadata_length, mmap_.get(), &message));
- ASSERT_EQ(MetadataVersion::V3, message->metadata_version());
+ ASSERT_EQ(MetadataVersion::V4, message->metadata_version());
}
TEST_P(TestIpcRoundTrip, SliceRoundTrip) {
diff --git a/cpp/src/arrow/ipc/message.cc b/cpp/src/arrow/ipc/message.cc
index 0dd5c72..21d6a69 100644
--- a/cpp/src/arrow/ipc/message.cc
+++ b/cpp/src/arrow/ipc/message.cc
@@ -67,20 +67,7 @@ class Message::MessageImpl {
}
MetadataVersion version() const {
- switch (message_->version()) {
- case flatbuf::MetadataVersion_V1:
- // Arrow 0.1
- return MetadataVersion::V1;
- case flatbuf::MetadataVersion_V2:
- // Arrow 0.2
- return MetadataVersion::V2;
- case flatbuf::MetadataVersion_V3:
- // Arrow >= 0.3
- return MetadataVersion::V3;
- // Add cases as other versions become available
- default:
- return MetadataVersion::V3;
- }
+ return internal::GetMetadataVersion(message_->version());
}
const void* header() const { return message_->header(); }
diff --git a/cpp/src/arrow/ipc/message.h b/cpp/src/arrow/ipc/message.h
index a1b6c07..495474e 100644
--- a/cpp/src/arrow/ipc/message.h
+++ b/cpp/src/arrow/ipc/message.h
@@ -42,7 +42,19 @@ class RandomAccessFile;
namespace ipc {
-enum class MetadataVersion : char { V1, V2, V3 };
+enum class MetadataVersion : char {
+ /// 0.1.0
+ V1,
+
+ /// 0.2.0
+ V2,
+
+ /// 0.3.0 to 0.7.1
+ V3,
+
+ /// >= 0.8.0
+ V4
+};
// ARROW-109: We set this number arbitrarily to help catch user mistakes. For
// deeply nested schemas, it is expected the user will indicate explicitly the
diff --git a/cpp/src/arrow/ipc/metadata-internal.cc
b/cpp/src/arrow/ipc/metadata-internal.cc
index ad00cfb..f04e9b0 100644
--- a/cpp/src/arrow/ipc/metadata-internal.cc
+++ b/cpp/src/arrow/ipc/metadata-internal.cc
@@ -33,6 +33,7 @@
#include "arrow/ipc/Message_generated.h"
#include "arrow/ipc/Tensor_generated.h"
#include "arrow/ipc/dictionary.h"
+#include "arrow/ipc/message.h"
#include "arrow/ipc/util.h"
#include "arrow/status.h"
#include "arrow/tensor.h"
@@ -57,6 +58,26 @@ using VectorLayoutOffset =
flatbuffers::Offset<arrow::flatbuf::VectorLayout>;
using Offset = flatbuffers::Offset<void>;
using FBString = flatbuffers::Offset<flatbuffers::String>;
+MetadataVersion GetMetadataVersion(flatbuf::MetadataVersion version) {
+ switch (version) {
+ case flatbuf::MetadataVersion_V1:
+ // Arrow 0.1
+ return MetadataVersion::V1;
+ case flatbuf::MetadataVersion_V2:
+ // Arrow 0.2
+ return MetadataVersion::V2;
+ case flatbuf::MetadataVersion_V3:
+ // Arrow 0.3 to 0.7.1
+ return MetadataVersion::V4;
+ case flatbuf::MetadataVersion_V4:
+ // Arrow >= 0.8
+ return MetadataVersion::V4;
+ // Add cases as other versions become available
+ default:
+ return MetadataVersion::V4;
+ }
+}
+
static Status IntFromFlatbuffer(const flatbuf::Int* int_data,
std::shared_ptr<DataType>* out) {
if (int_data->bitWidth() > 64) {
@@ -700,7 +721,7 @@ static Status WriteBuffers(FBB& fbb, const
std::vector<BufferMetadata>& buffers,
for (size_t i = 0; i < buffers.size(); ++i) {
const BufferMetadata& buffer = buffers[i];
- fb_buffers.emplace_back(buffer.page, buffer.offset, buffer.length);
+ fb_buffers.emplace_back(buffer.offset, buffer.length);
}
*out = fbb.CreateVectorOfStructs(fb_buffers);
return Status::OK();
@@ -751,7 +772,7 @@ Status WriteTensorMessage(const Tensor& tensor, int64_t
buffer_start_offset,
auto fb_shape = fbb.CreateVector(dims);
auto fb_strides = fbb.CreateVector(tensor.strides());
int64_t body_length = tensor.data()->size();
- flatbuf::Buffer buffer(-1, buffer_start_offset, body_length);
+ flatbuf::Buffer buffer(buffer_start_offset, body_length);
TensorOffset fb_tensor =
flatbuf::CreateTensor(fbb, fb_type_type, fb_type, fb_shape, fb_strides,
&buffer);
diff --git a/cpp/src/arrow/ipc/metadata-internal.h
b/cpp/src/arrow/ipc/metadata-internal.h
index 309e758..380f3c9 100644
--- a/cpp/src/arrow/ipc/metadata-internal.h
+++ b/cpp/src/arrow/ipc/metadata-internal.h
@@ -27,6 +27,7 @@
#include "arrow/ipc/Schema_generated.h"
#include "arrow/ipc/dictionary.h"
+#include "arrow/ipc/message.h"
namespace arrow {
@@ -48,10 +49,12 @@ namespace ipc {
namespace internal {
static constexpr flatbuf::MetadataVersion kCurrentMetadataVersion =
- flatbuf::MetadataVersion_V3;
+ flatbuf::MetadataVersion_V4;
static constexpr flatbuf::MetadataVersion kMinMetadataVersion =
- flatbuf::MetadataVersion_V3;
+ flatbuf::MetadataVersion_V4;
+
+MetadataVersion GetMetadataVersion(flatbuf::MetadataVersion version);
static constexpr const char* kArrowMagicBytes = "ARROW1";
@@ -62,9 +65,6 @@ struct FieldMetadata {
};
struct BufferMetadata {
- /// The shared memory page id where to find this. Set to -1 if unused
- int32_t page;
-
/// The relative offset into the memory page to the starting byte of the
buffer
int64_t offset;
diff --git a/cpp/src/arrow/ipc/reader.cc b/cpp/src/arrow/ipc/reader.cc
index 50eb903..8e10d7d 100644
--- a/cpp/src/arrow/ipc/reader.cc
+++ b/cpp/src/arrow/ipc/reader.cc
@@ -550,20 +550,7 @@ class RecordBatchFileReader::RecordBatchFileReaderImpl {
int num_record_batches() const { return footer_->recordBatches()->size(); }
MetadataVersion version() const {
- switch (footer_->version()) {
- case flatbuf::MetadataVersion_V1:
- // Arrow 0.1
- return MetadataVersion::V1;
- case flatbuf::MetadataVersion_V2:
- // Arrow 0.2
- return MetadataVersion::V2;
- case flatbuf::MetadataVersion_V3:
- // Arrow 0.3
- return MetadataVersion::V3;
- // Add cases as other versions become available
- default:
- return MetadataVersion::V3;
- }
+ return internal::GetMetadataVersion(footer_->version());
}
FileBlock record_batch(int i) const {
diff --git a/cpp/src/arrow/ipc/writer.cc b/cpp/src/arrow/ipc/writer.cc
index 279a695..5598cc6 100644
--- a/cpp/src/arrow/ipc/writer.cc
+++ b/cpp/src/arrow/ipc/writer.cc
@@ -149,8 +149,6 @@ class RecordBatchSerializer : public ArrayVisitor {
buffer_meta_.reserve(buffers_.size());
- const int32_t kNoPageId = -1;
-
// Construct the buffer metadata for the record batch header
for (size_t i = 0; i < buffers_.size(); ++i) {
const Buffer* buffer = buffers_[i].get();
@@ -163,15 +161,7 @@ class RecordBatchSerializer : public ArrayVisitor {
padding = BitUtil::RoundUpToMultipleOf8(size) - size;
}
- // TODO(wesm): We currently have no notion of shared memory page id's,
- // but we've included it in the metadata IDL for when we have it in the
- // future. Use page = -1 for now
- //
- // Note that page ids are a bespoke notion for Arrow and not a feature we
- // are using from any OS-level shared memory. The thought is that systems
- // may (in the future) associate integer page id's with physical memory
- // pages (according to whatever is the desired shared memory mechanism)
- buffer_meta_.push_back({kNoPageId, offset, size + padding});
+ buffer_meta_.push_back({offset, size + padding});
offset += size + padding;
}
diff --git a/format/Schema.fbs b/format/Schema.fbs
index 186f8e3..6021e92 100644
--- a/format/Schema.fbs
+++ b/format/Schema.fbs
@@ -20,9 +20,17 @@
namespace org.apache.arrow.flatbuf;
enum MetadataVersion:short {
+ /// 0.1.0
V1,
+
+ /// 0.2.0
V2,
- V3
+
+ /// 0.3.0 -> 0.7.1
+ V3,
+
+ /// >= 0.8.0
+ V4
}
/// These are stored in the flatbuffer in the Type union below
@@ -293,10 +301,6 @@ enum Endianness:short { Little, Big }
/// ----------------------------------------------------------------------
/// A Buffer represents a single contiguous memory segment
struct Buffer {
- /// The shared memory page id where this buffer is located. Currently this is
- /// not used
- page: int;
-
/// The relative offset into the shared memory page where the bytes for this
/// buffer starts
offset: long;
diff --git
a/java/vector/src/main/java/org/apache/arrow/vector/schema/ArrowBuffer.java
b/java/vector/src/main/java/org/apache/arrow/vector/schema/ArrowBuffer.java
index d8c9e30..4e0187e 100644
--- a/java/vector/src/main/java/org/apache/arrow/vector/schema/ArrowBuffer.java
+++ b/java/vector/src/main/java/org/apache/arrow/vector/schema/ArrowBuffer.java
@@ -24,21 +24,15 @@ import com.google.flatbuffers.FlatBufferBuilder;
public class ArrowBuffer implements FBSerializable {
- private int page;
private long offset;
private long size;
- public ArrowBuffer(int page, long offset, long size) {
+ public ArrowBuffer(long offset, long size) {
super();
- this.page = page;
this.offset = offset;
this.size = size;
}
- public int getPage() {
- return page;
- }
-
public long getOffset() {
return offset;
}
@@ -52,7 +46,6 @@ public class ArrowBuffer implements FBSerializable {
final int prime = 31;
int result = 1;
result = prime * result + (int) (offset ^ (offset >>> 32));
- result = prime * result + page;
result = prime * result + (int) (size ^ (size >>> 32));
return result;
}
@@ -72,9 +65,6 @@ public class ArrowBuffer implements FBSerializable {
if (offset != other.offset) {
return false;
}
- if (page != other.page) {
- return false;
- }
if (size != other.size) {
return false;
}
@@ -83,12 +73,12 @@ public class ArrowBuffer implements FBSerializable {
@Override
public int writeTo(FlatBufferBuilder builder) {
- return Buffer.createBuffer(builder, page, offset, size);
+ return Buffer.createBuffer(builder, offset, size);
}
@Override
public String toString() {
- return "ArrowBuffer [page=" + page + ", offset=" + offset + ", size=" +
size + "]";
+ return "ArrowBuffer [offset=" + offset + ", size=" + size + "]";
}
}
diff --git
a/java/vector/src/main/java/org/apache/arrow/vector/schema/ArrowRecordBatch.java
b/java/vector/src/main/java/org/apache/arrow/vector/schema/ArrowRecordBatch.java
index c842d4c..bf0967a 100644
---
a/java/vector/src/main/java/org/apache/arrow/vector/schema/ArrowRecordBatch.java
+++
b/java/vector/src/main/java/org/apache/arrow/vector/schema/ArrowRecordBatch.java
@@ -72,7 +72,7 @@ public class ArrowRecordBatch implements ArrowMessage {
for (ArrowBuf arrowBuf : buffers) {
arrowBuf.retain();
long size = arrowBuf.readableBytes();
- arrowBuffers.add(new ArrowBuffer(0, offset, size));
+ arrowBuffers.add(new ArrowBuffer(offset, size));
LOGGER.debug(String.format("Buffer in RecordBatch at %d, length: %d",
offset, size));
offset += size;
if (alignBuffers && offset % 8 != 0) { // align on 8 byte boundaries
diff --git
a/java/vector/src/main/java/org/apache/arrow/vector/stream/MessageSerializer.java
b/java/vector/src/main/java/org/apache/arrow/vector/stream/MessageSerializer.java
index f69aa41..c397cec 100644
---
a/java/vector/src/main/java/org/apache/arrow/vector/stream/MessageSerializer.java
+++
b/java/vector/src/main/java/org/apache/arrow/vector/stream/MessageSerializer.java
@@ -385,6 +385,10 @@ public class MessageSerializer {
throw new IOException("Cannot currently deserialize record batches over
2GB");
}
+ if (message.version() != MetadataVersion.V4) {
+ throw new IOException("Received metadata with an incompatible version
number");
+ }
+
switch (message.headerType()) {
case MessageHeader.RecordBatch:
return deserializeRecordBatch(in, message, alloc);
@@ -409,7 +413,7 @@ public class MessageSerializer {
Message.startMessage(builder);
Message.addHeaderType(builder, headerType);
Message.addHeader(builder, headerOffset);
- Message.addVersion(builder, MetadataVersion.V3);
+ Message.addVersion(builder, MetadataVersion.V4);
Message.addBodyLength(builder, bodyLength);
builder.finish(Message.endMessage(builder));
return builder.dataBuffer();
diff --git a/js/src/format/Schema_generated.ts
b/js/src/format/Schema_generated.ts
index 65493b7..c5b3e50 100644
--- a/js/src/format/Schema_generated.ts
+++ b/js/src/format/Schema_generated.ts
@@ -2028,23 +2028,13 @@ export namespace org.apache.arrow.flatbuf {
}
/**
- * The shared memory page id where this buffer is located. Currently this
is
- * not used
- *
- * @returns {number}
- */
- page(): number {
- return this.bb.readInt32(this.bb_pos);
- }
-
- /**
* The relative offset into the shared memory page where the bytes for this
* buffer starts
*
* @returns {flatbuffers.Long}
*/
offset(): flatbuffers.Long {
- return this.bb.readInt64(this.bb_pos + 8);
+ return this.bb.readInt64(this.bb_pos);
}
/**
@@ -2054,7 +2044,7 @@ export namespace org.apache.arrow.flatbuf {
* @returns {flatbuffers.Long}
*/
length(): flatbuffers.Long {
- return this.bb.readInt64(this.bb_pos + 16);
+ return this.bb.readInt64(this.bb_pos + 8);
}
/**
@@ -2064,12 +2054,10 @@ export namespace org.apache.arrow.flatbuf {
* @param {flatbuffers.Long} length
* @returns {flatbuffers.Offset}
*/
- static createBuffer(builder: flatbuffers.Builder, page: number, offset:
flatbuffers.Long, length: flatbuffers.Long): flatbuffers.Offset {
- builder.prep(8, 24);
+ static createBuffer(builder: flatbuffers.Builder, offset:
flatbuffers.Long, length: flatbuffers.Long): flatbuffers.Offset {
+ builder.prep(8, 16);
builder.writeInt64(length);
builder.writeInt64(offset);
- builder.pad(4);
- builder.writeInt32(page);
return builder.offset();
}
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