github.com/m3db/m3@v1.5.0/src/cmd/tools/read_data_files/README.md (about)

     1  # read_data_files
     2  
     3  `read_data_files` is a utility to extract data for all timeseries' present in a TSDB file set.
     4  
     5  # Usage
     6  ```
     7  $ git clone git@github.com:m3db/m3.git
     8  $ make read_data_files
     9  $ ./bin/read_data_files
    10  Usage: read_data_files [-B value] [-b value] [-f value] [-n value] [-p value] [-s value] [-t value] [-v value] [parameters ...]
    11   -B, --benchmark=value
    12                      benchmark mode (optional), [series|datapoints]
    13   -b, --block-start=value
    14                      Block Start Time [in nsec]
    15   -f, --id-filter=value
    16                      ID Contains Filter (optional)
    17   -n, --namespace=value
    18                      Namespace [e.g. metrics]
    19   -p, --path-prefix=value
    20                      Path prefix [e.g. /var/lib/m3db]
    21   -s, --shard=value  Shard [expected format uint32], or -1 for all shards in the
    22                      directory
    23   -t, --fileset-type=value
    24                      flush|snapshot
    25   -v, --volume=value
    26                      Volume number
    27  
    28  # example usage
    29  # read_data_files -b1480960800000000000 -n metrics -p /var/lib/m3db -s 451 -f 'metric-name' > /tmp/sample-data.out
    30  ```
    31  
    32  # TBH
    33  - The tool outputs the identifiers to `stdout`, remember to redirect as desired.
    34  - The code currently assumes the data layout under the hood is `<path-prefix>/data/<namespace>/<shard>/...<block-start>-[index|...].db`. If this is not the file structure under the hood, replicate it to use this tool. Remember to copy checkpoint files along with each index file.