[GitHub] [incubator-iotdb] little-emotion commented on issue #472: [IOTDB-267]reduce IO operations in deserializing chunk header

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little-emotion commented on issue #472: [IOTDB-267]reduce IO operations in deserializing chunk header
URL: https://github.com/apache/incubator-iotdb/pull/472#issuecomment-546171378
 
 
   > One more push: If we record the total chunk size in the ChunkMetadata, we do not have to split the read of ChunkHeader and chunk data into 2 reads.
   
   I've thought about it, but there are two other things to consider.
   1. This will change the tsfile structure. I think it's best to change the file structure when upgrading a large version.
   2. Although the granularity of data read by iotdb is chunk, we have been discussing whether we should change the granularity of data read by iotdb to page, especially in the case of insufficient memory.

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