![]() ![]() You should compare SSIS with ADF, which may take between 30-60 seconds to start up and is really suited to files of 1GB+ in size, processing large parquet files in parallel. So you should be able to estimate how long an SSIS package should take to process the number of rows you have per file.Īnother option you have is to either write a custom SSIS source task or to purchase a 3rd party parquet file source. As a rule, SSIS can usually process 50,000-100,000 rows per second for a single non-blocking dataflow with a startup time of 2-3 seconds. Specify as a ReadOnly variable User::QueryPath and specify as a ReadWrite variable User. User::QueryActual -> String -> SELECT 1 Add a Script Task to the package. User::QueryPath -> String -> C:\path\to\file.sql. In this case, consider converting the data to a supported format before using SSIS. If you're adamant about reading the file yourself, add two Variables to your SSIS package and supply values like the following. If the parquet files are not several multiples of 256MB in size, then it is likely that the file format is inappropriate for the volume of data. Therefore you should ask yourself whether the raw data you hold in Parquet files is large enough to justify the Parquet format. Since these 256MB blocks represent compressed data, the underlying raw size of this data is likely to be 1-2.5GB per block. It does so because Parquet supports partitioning and is designed for use on the HDFS file system which will distribute 256MB blocks of data to different processing nodes for parallel processing. The reason ADF supports Parquet is that the engine is based upon Spark, which uses Parquet as its intermediate storage format. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |