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我想以连续的方式计算出现在网络流量中的协议的百分比，以便这些百分比不断更新新事件。将生成一个饼图并使用百分比进行更新。由于我需要新的和以前的数据进行计算，我决定使用内存表来将事件保存更长时间（比如一天）。

由于事件表仅在与事件流连接时才可用，因此我也选择了外连接来获取旧值。只对协议及其百分比感兴趣，我只需要两列，但我无法在外连接中应用聚合函数。到目前为止，我生成的查询是：

@Import('MAINInStream:1.0.0')
define stream MAINInStream (ts string, uid string, id_orig_h string, id_orig_p int, id_resp_h string, id_resp_p int, proto string, service string, duration double, orig_bytes long, resp_bytes long, conn_state string, local_orig bool, local_resp bool, missed_bytes long, history string, orig_pkts long, orig_ip_bytes long, resp_pkts long, resp_ip_bytes long, tunnel_parents string, sensorname string);

@Export('ProtocolStream:1.0.0')
define stream ProtocolStream (protocol string, count int);

define table mem_conn_table (timestamp long, id_orig_h string, id_orig_p int, id_resp_h string, id_resp_p int, proto string);

from MAINInStream
select time:timestampInMilliseconds(time:dateAdd(str:replaceAll(ts,'T',' '), 5, 'hour',"yyyy-MM-dd HH:mm:ss"),'yyyy-MM-dd HH:mm') as timestamp, id_orig_h, id_orig_p, id_resp_h, id_resp_p, proto
insert into intermediateStream;

from MAINInStream
select time:timestampInMilliseconds(time:dateAdd(str:replaceAll(ts,'T',' '), 5, 'hour',"yyyy-MM-dd HH:mm:ss"),'yyyy-MM-dd HH:mm') as timestamp, id_orig_h, id_orig_p, id_resp_h, id_resp_p, proto
group by id_resp_p
insert into mem_conn_table;

from intermediateStream#window.externalTimeBatch(timestamp,1min, timestamp, 1min) as i right outer join mem_conn_table[time:dateDiff(time:currentTimestamp(),cast(timestamp,"string"), "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm:ss") == 0] as mc
on  i.timestamp == mc.timestamp 
SELECT (ifThenElse(mc.id_resp_p == 21,'FTP', ifThenElse(mc.id_resp_p == 22,'SSH', ifThenElse(mc.id_resp_p == 25,'SMTP', ifThenElse(mc.id_resp_p == 445,'SMB','MYSQL')))))  as protocol , cast(count(mc.id_resp_p),'int') as count
insert into ProtocolStream;

我正在用一分钟的外部时间批处理窗口，然后获取协议及其计数，但它没有给我任何输出。

有什么建议么？

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1 回答 1

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您不能将外连接与内存表一起使用。如果需要，您可以将驻留在内存表中的事件发送到中间流并将其用于连接（指南）。但是，对于您的场景，您可以使用externalTime窗口，而不是使用事件表。尝试类似于以下的操作；

@Import('MAINInStream:1.0.0')
define stream MAINInStream (ts string, uid string, id_orig_h string, id_orig_p int, id_resp_h string, id_resp_p int, proto string, service string, duration double, orig_bytes long, resp_bytes long, conn_state string, local_orig bool, local_resp bool, missed_bytes long, history string, orig_pkts long, orig_ip_bytes long, resp_pkts long, resp_ip_bytes long, tunnel_parents string, sensorname string);

@Export('ProtocolStream:1.0.0')
define stream ProtocolStream (protocol string, count long);

@Export('PercentageStream:1.0.0')
define stream PercentageStream (protocol string, count long, percentage double);


from MAINInStream
select 
    time:timestampInMilliseconds(time:dateAdd(str:replaceAll(ts,'T',' '), 5, 'hour',"yyyy-MM-dd HH:mm:ss"),'yyyy-MM-dd HH:mm') as timestamp, 
    (ifThenElse(mc.id_resp_p == 21,'FTP', ifThenElse(mc.id_resp_p == 22,'SSH', ifThenElse(mc.id_resp_p == 25,'SMTP', ifThenElse(mc.id_resp_p == 445,'SMB','MYSQL')))))  as protocol
    id_orig_h, id_orig_p, id_resp_h, id_resp_p, proto
insert into intermediateStream;

from intermediateStream#window.externalTime(timestamp, 1 day)
select timestamp, count() as totalCount
insert into totalCountStream;

from intermediateStream#window.externalTime(timestamp, 1 day)
select timestamp, protocol, count() as count
group by protocol
insert into perProtocolCountStream;

from perProtocolCountStream
select protocol, count
insert into ProtocolStream;

from totalCountStream#window.time(1 min) as tcs join perProtocolCountStream#window.time(1 min) as pcs
select pcs.protocol, pcs.count as count, ((pcs.count/tcs.totalCount)) * 100 as percentage
    on tcs.timestamp == pcs.timestamp
insert into PercentageStream;
于 2016-08-29T08:37:51.870 回答