To avoid creating small files in HBase, increase the MemStore flush size (hbase.regionserver.memstore.flush.size) and write buffer size (hbase.regionserver.write.buffer.size) to delay flushing. Adjust compaction settings, like storefile compaction threshold (hbase.regionserver.storefile.compaction.threshold), to reduce frequent minor compactions. Increase blockingStoreFileSize (hbase.hstore.blockingStoreFileSize) to control HFile sizes. Consider using bulk loading for large data imports. Also, optimize region sizes by adjusting region split size (hbase.regionserver.region.split.size). Regularly monitor HBase metrics and adjust configurations for efficient flushing and file management.