[GitHub] [arrow] mayuropensource edited a comment on pull request #7022: ARROW-8562: [C++] IO: Parameterize I/O Coalescing using S3 metrics

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

mayuropensource edited a comment on pull request #7022:
URL: https://github.com/apache/arrow/pull/7022#issuecomment-619276182


   // SOME_S3_DATA_URI should point to a file (over http) that is ~500 MiB.
   // TTFB_sec is the time-to-first-byte in seconds as measured by curl
   // Bandwidth_bytes_per_sec is download bandwidth (in bytes per second) as measured by curl
   
   // Once SOME_S3_DATA_URI  is created, it can be queried on a regular basis for measurements.
   
   `S3_DATA_URI="SOME_S3_DATA_URI"; `
   
   `curl --negotiate -u: -o /dev/null -w "connect_time_sec=%{time_connect} total_time_sec=%{time_total} data_size_bytes=%{size_download} TTFB_sec=%{time_starttransfer} Bandwidth_bytes_per_sec=%{speed_download}\n" $S3_DATA_URI`


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