n3nash commented on a change in pull request #2440:
URL: https://github.com/apache/hudi/pull/2440#discussion_r557120061
##########
File path:
hudi-common/src/main/java/org/apache/hudi/common/table/log/HoodieLogFileReader.java
##########
@@ -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:
Instead of this, can we do the following in the constructor ?
```
if (fsDataInputStream.getWrappedStream() instanceof FSInputStream || ) {
this.inputStream = new TimedFSDataInputStream(logFile.getPath(), new
FSDataInputStream(
new BufferedFSInputStream((FSInputStream)
fsDataInputStream.getWrappedStream(), bufferSize)));
} else if (**fsDataInputStream.getWrappedStream() instanceof
FSDataInputStream**) {
<initialize buffered input stream>
}
```
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