这里是我在需要时写的Ruby代码需要。提供适当的意见。它为您提供 HBase shell count_table 命令。第一个参数是表名，第二个是属性数组，与 scan shell命令相同。

Here is Ruby code I have written when needed thing like you need. Appropriate comments are provided. It provides you with HBase shell count_table command. First parameter is table name and second is array of properties, the same as for scan shell command.

您的问题是

count_table 'your.table', { COLUMNS => 'your.family' }

我也建议添加缓存，

I also recommend to add cache, like for scan:

count_table 'your.table', { COLUMNS => 'your.family', CACHE => 10000 }

在这里你可以使用来源：

And here you go with sources:

# Argiments are the same as for scan command.
# Examples:
#
# count_table 'test.table', { COLUMNS => 'f:c1' }
# --- Counts f:c1 columsn in 'test_table'.
#
# count_table 'other.table', { COLUMNS => 'f' }
# --- Counts 'f' family rows in 'other.table'.
#
# count_table 'test.table', { CACHE => 1000 }
# --- Count rows with caching.
#
def count_table(tablename, args = {})

    table = @shell.hbase_table(tablename)

    # Run the scanner
    scanner = table._get_scanner(args)

    count = 0
    iter = scanner.iterator

    # Iterate results
    while iter.hasNext
        row = iter.next
        count += 1
    end

    # Return the counter
    return count
end