Allocate direct buffers for multipart upload #559
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dopuskh3
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I think this feature is good. |
rsharan-dd
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Jun 6, 2024
storage/s3/src/main/java/io/aiven/kafka/tieredstorage/storage/s3/S3Storage.java
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@jeqo fixed tests, PTAL |
Allow to allocate multipart upload buffers as direct buffer rather than on the heap. We try to set a pretty large multipart upload part size on cluster to optimize throughput and reduce S3 requests. At the same time, we try to keep kafka JVM heap size contained on most kafka installation in order to leave as much memory as possible for the page cache. As a matter of example, we will use 4GB heap size on machines with 64GB available memory. The consequence of using pretty large multipart upload size on contained JVM heap size is that we can pretty easily run out of heap size if we suddenly have to upload many segments to tiered storage. The strategy we propose is to allocate multipart buffer in direct memory so that we can more easily configure direct buffer budget.
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| + "All parts but the last one will have this size. " | ||
| + "Valid values: between 5MiB and 2GiB"; | ||
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| public static final String S3_MULTIPART_UPLOAD_DIRECT_BUFFERS_CONFIG = "s3.multipart.upload.direct.buffers"; |
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nit:
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| public static final String S3_MULTIPART_UPLOAD_DIRECT_BUFFERS_CONFIG = "s3.multipart.upload.direct.buffers"; | |
| public static final String S3_MULTIPART_UPLOAD_BUFFER_ALLOCATION_DIRECT_CONFIG = "s3.multipart.upload.buffer.allocation.direct"; |
| return getBoolean(S3_PATH_STYLE_ENABLED_CONFIG); | ||
| } | ||
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| public Boolean multipartDirectBuffers() { |
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nit:
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| public Boolean multipartDirectBuffers() { | |
| public Boolean uploadBufferAllocationDirect() { |
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Could these tests be parametrized to have coverage for the direct allocation?
| private String bucketName; | ||
| private int partSize; | ||
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| private boolean multipartDirectBuffers; |
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| private boolean multipartDirectBuffers; | |
| private boolean bufferAllocationDirect; |
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Allow to allocate multipart upload buffers as direct buffer rather than on the heap.
Reasoning
We try to set a pretty large multipart upload part size on cluster to optimize throughput and reduce S3 requests.
At the same time, we try to keep kafka JVM heap size contained on most kafka installation in order to leave as much memory as possible for the page cache. As a matter of example, we will use 4GB heap size on machines with 64GB available memory.
The consequence of using pretty large multipart upload size on contained JVM heap size is that we can pretty easily run out of heap size if we suddenly have to upload many segments to tiered storage.
The strategy we propose is to allocate multipart buffers in direct memory so that we can more easily configure direct buffer budget.
Usage
We introduced
s3.multipart.upload.direct.buffersboolean configuration flag (disabled by default).