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Improve sst_dump help message

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Summary:
Current Message

```
sst_dump [--command=check|scan|none|raw] [--verify_checksum] --file=data_dir_OR_sst_file [--output_hex] [--input_key_hex] [--from=<user_key>] [--to=<user_key>] [--read_num=NUM] [--show_properties] [--show_compression_sizes] [--show_compression_sizes [--set_block_size=<block_size>]]
```
New message

```
sst_dump --file=<data_dir_OR_sst_file> [--command=check|scan|raw]
    --file=<data_dir_OR_sst_file>
      Path to SST file or directory containing SST files

    --command=check|scan|raw
        check: Iterate over entries in files but dont print anything except if an error is encounterd (default command)
        scan: Iterate over entries in files and print them to screen
        raw: Dump all the table contents to <file_name>_dump.txt

    --output_hex
      Can be combined with scan command to print the keys and values in Hex

    --from=<user_key>
      Key to start reading from when executing check|scan

    --to=<user_key>
      Key to stop reading at when executing check|scan

    --read_num=<num>
      Maximum number of entries to read when executing check|scan

    --verify_checksum
      Verify file checksum when executing check|scan

    --input_key_hex
      Can be combined with --from and --to to indicate that these values are encoded in Hex

    --show_properties
      Print table properties after iterating over the file

    --show_compression_sizes
      Independent command that will recreate the SST file using 16K block size with different
      compressions and report the size of the file using such compression

    --set_block_size=<block_size>
      Can be combined with --show_compression_sizes to set the block size that will be used
      when trying different compression algorithms
```

Test Plan: none

Reviewers: yhchiang, andrewkr, kradhakrishnan, yiwu, sdong

Reviewed By: sdong

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D56325
This commit is contained in:
Islam AbdelRahman 2016-04-08 12:05:02 -07:00
parent 0930e5e99f
commit 0522990358
1 changed files with 38 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
tools/sst_dump_tool.cc
View File

@ -348,16 +348,44 @@ namespace {
void print_help() {
fprintf(stderr,
"sst_dump [--command=check|scan|none|raw] [--verify_checksum] "
"--file=data_dir_OR_sst_file"
" [--output_hex]"
" [--input_key_hex]"
" [--from=<user_key>]"
" [--to=<user_key>]"
" [--read_num=NUM]"
" [--show_properties]"
" [--show_compression_sizes]"
" [--show_compression_sizes [--set_block_size=<block_size>]]\n");
R"(sst_dump --file=<data_dir_OR_sst_file> [--command=check|scan|raw]
--file=<data_dir_OR_sst_file>
Path to SST file or directory containing SST files
--command=check|scan|raw
check: Iterate over entries in files but dont print anything except if an error is encounterd (default command)
scan: Iterate over entries in files and print them to screen
raw: Dump all the table contents to <file_name>_dump.txt
--output_hex
Can be combined with scan command to print the keys and values in Hex
--from=<user_key>
Key to start reading from when executing check|scan
--to=<user_key>
Key to stop reading at when executing check|scan
--read_num=<num>
Maximum number of entries to read when executing check|scan
--verify_checksum
Verify file checksum when executing check|scan
--input_key_hex
Can be combined with --from and --to to indicate that these values are encoded in Hex
--show_properties
Print table properties after iterating over the file
--show_compression_sizes
Independent command that will recreate the SST file using 16K block size with different
compressions and report the size of the file using such compression
--set_block_size=<block_size>
Can be combined with --show_compression_sizes to set the block size that will be used
when trying different compression algorithms
)");
}
} // namespace