如何在 cassandra 中使用 nodetool 查找总密钥空间大小？

Question

我想对 nodetool tablestats metadata 列出的所有表求和“Space 使用（总计）：0” .谁能知道如何做到这一点？请帮忙

所需代码：为所有表添加 Space 使用（总计） 值；如下所示：

 for Table: dbtimestamp 
         size += value(Space used (total)) 
         Table: dbtimestamp_compressed 
         size += value((Space used (total)) 
         Table: migration_status 
         size += value((Space used (total))



----------------------------------------------------------------------------

nodetool tablestats metadata
    Total number of tables: 584
    ----------------
    Keyspace : metadata
            Read Count: 296
            Read Latency: 0.23686486486486488 ms
            Write Count: 68611
            Write Latency: 0.02151582107825276 ms
            Pending Flushes: 0
                    Table: dbtimestamp
                    SSTable count: 0
                    Space used (live): 0
                    Space used (total): 0
                    Space used by snapshots (total): 0
                    Off heap memory used (total): 0

                    Table: dbtimestamp_compressed
                    SSTable count: 0
                    Space used (live): 0
                    Space used (total): 0
                    Space used by snapshots (total): 0
                    Off heap memory used (total): 0

                    Table: migration_status
                    SSTable count: 2
                    Space used (live): 13014
                    Space used (total): 13014
                    Space used by snapshots (total): 0
                    Off heap memory used (total): 80

                    Table: reporttimestamp_by_type
                    SSTable count: 2
                    Space used (live): 121332
                    Space used (total): 121332
                    Space used by snapshots (total): 0
                    Off heap memory used (total): 112

Answer 1

能否请您尝试以下（因为您没有提到样品所以无法测试）。

awk '/Space used \(total\)/{sum+=$NF} END{print sum}'  Input_file

Answer 2

我得到了答案，我在 awk statement.corrected 中拼错了 'END' 命令，如下所示：

nodetool tablestats metadata -H | awk '/Space used \(total\):/ {sum += } END {print sum}'

如何在 cassandra 中使用 nodetool 查找总密钥空间大小？

how to find total keyspace size using nodetool in cassandra?

regex

bash

awk

nodetool

cassandra-3.0