Changed default read buffer size to 128KB#324
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ozkoca merged 1 commit intoawslabs:physical-io-featurefrom Jul 25, 2025
Merged
Changed default read buffer size to 128KB#324ozkoca merged 1 commit intoawslabs:physical-io-featurefrom
ozkoca merged 1 commit intoawslabs:physical-io-featurefrom
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## Description of change This PR implements a new PhysicalIO design with key improvements: **Fixed Block Size:** Previously, block sizes varied based on request ranges, requiring entire request ranges to complete before blocks became available. The new design uses fixed-size blocks that become ready as soon as individual blocks are filled, enabling faster data access and better parallelization. **Direct Block Writing:** Eliminates an extra memory copy by writing S3 data directly into Block storage instead of copying from intermediate buffers, reducing memory overhead and CPU usage. **Improved Concurrency:** Fixed-size blocks allow multiple blocks to be processed independently, improving throughput for concurrent read operations. **Better Memory Management:** Predictable block sizes enable more efficient memory allocation and cache management strategies. **Enhanced Read Performance:** Blocks become available for reading as soon as they're filled, rather than waiting for entire request ranges to complete, reducing read latency. #### Relevant issues #286 #287 #288 #289 #294 #316 #320 #323 #324 #### Does this contribution introduce any breaking changes to the existing APIs or behaviors? No #### Does this contribution introduce any new public APIs or behaviors? No #### How was the contribution tested? Unit tests, microbenchmarks #### Does this contribution need a changelog entry? - [ ] I have updated the CHANGELOG or README if appropriate --- By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and I agree to the terms of the [Developer Certificate of Origin (DCO)](https://developercertificate.org/).
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Description of change
This PR changes default read buffer size to 128KB to have a better performance
Relevant issues
#286
#287
#288
#289
#294
#316
#320
#323
Does this contribution introduce any breaking changes to the existing APIs or behaviors?
No
Does this contribution introduce any new public APIs or behaviors?
No
How was the contribution tested?
Unit tests
Does this contribution need a changelog entry?
N/A
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and I agree to the terms of the Developer Certificate of Origin (DCO).