[GitHub] [hudi] vburenin commented on a change in pull request #2440: Fixed suboptimal implementation of a magic sequence search

[GitBox <gi...@apache.org>]

vburenin commented on a change in pull request #2440:
URL: https://github.com/apache/hudi/pull/2440#discussion_r557508471



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File path: hudi-common/src/main/java/org/apache/hudi/common/table/log/HoodieLogFileReader.java
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@@ -274,19 +275,27 @@ private boolean isBlockCorrupt(int blocksize) throws IOException {
   }
 
   private long scanForNextAvailableBlockOffset() throws IOException {
+    // Make buffer large enough to scan through the file as quick as possible especially if it is on S3/GCS.
+    // Using lower buffer is incurring a lot of API calls thus drastically increasing the cost of the storage
+    // and also may take days to complete scanning trough the large files.
+    byte[] dataBuf = new byte[1024 * 1024];

Review comment:
       I would consider keeping a new one as it does a lot less of memory copies and a lot less additional overhead, technically it is more efficient from the resource utilization stand point.




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