Question

我想为 nodetool tablestats元数据列出的所有表总计“ 已用空间（总计）：0 ”。谁能知道该怎么做？请帮忙。

所需代码：为所有表添加已用空间（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

请您尝试以下操作（因为您没有提到示例，因此无法对其进行测试）。

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

Answer 2

我得到了答案，我在awk语句中拼写了'END'命令，如下所示进行了纠正：

nodetool tablestats metadata -H | awk '/Space used \(total\):/ {sum += $4} END {print sum}'

如何在cassandra中使用nodetool查找总键空间大小？

2 个答案: