考试系统学术报告-非结构化数据库
这个还的从我们的英语的第一次测试说起,第一次测试,测试人数170,8人,测试的有效数据100.其中呢,英语听力是怎么个状况,有人说听力很正常。没问题,有人说试抽出来了,听力过了5分钟才有,还有说干脆听不到。当时呢,我自己也在集体的测试中,具体的问题先
这个还的从我们的英语的第一次测试说起,第一次测试,测试人数170,8人,测试的有效数据100.其中呢,英语听力是怎么个状况,有人说听力很正常。没问题,有人说试抽出来了,听力过了5分钟才有,还有说干脆听不到。当时呢,我自己也在集体的测试中,具体的问题先不说。第一次测试问题正式暴漏。开会整理后,我们积极查找原因。是什么造成的。后来的第二次,三次听力测试的时候。还是出现了同样的问题。说声音不清楚。这次吸取了上次的教训。首先让同学们排除自己问题,是否电脑耳机没插好,耳机是否适配,确认不是自己问题了再上报自己的情况。下面大家请看这两张图


相信做个测试的同学,对以上两个页面是很熟悉的。
我们英语听力确实出现了问题,有哪些问题呢,如何发现的?什么原因造成的?又是如何解决的?
出现的问题综合有两类
网络影响,没有音频
音频延迟
这个时候就体现了我们对问题的分析能力了。如何才能总结先前经验,快速发现问题,找到问题的原因,并解决它。
发现问题
方案一 ping服务器
我们注意看下面的这个图
你不是没有声音么,我们看看你是否能连接到服务器。
当时我们英语测试的时候其中之一发现的问题来自于ping 服务器的网址 ,大家可以依稀看到响应时间是404ms,而正常情况好似多少呢.
正常情况小于1ms
对比相差400多陪,而且中间还有断续或网络中断。这就是是病毒造成的。经过米老师的不懈努力,终于将这个arp病毒困死在了本机,出不去了,具体的方法是通过网络中心绑定端口。这个问题解决了后,英语听力基本是没有什么大问题了。
小范围的测试是没有问题 了,可是到了第二天考英语的时候,每次是在800人以上。服务器的承受压力,大家请看这幅图。这个是考生刚登陆系统时的截图。
方案二: 通过监视服务器的运行状态
问题二 抽提中音频延迟
上图 是开始听力测试的页面了。这个时候ping服务器还是会看到超过400的现状,但是不会有超时和断续的现象,这时候就是延迟的问题了。
查找原因
问题一解决了,再后来就得看自己的代码了,代码是否有问题呢。看了再说。
这个连接池是没有写在配置文件中的,而且大家请注意这个链接是每次进行链接时进行设置的,要写在配置文件中,方便修改。
如何修改呢,不同的数据库修改大体还是相同的 。
但是修改后进行更详细的测试还有没有测试出问题来。看来这个还不是主要的问题。后来在老师的带领下,考虑到了网络交换设备的转换, 服务器用的是1000M的,而我们的交换机和主机的转换确实100M的,这就大大降低了音频的传输效率,造成了延迟。所以我们就使用了隔开时间的抽提的方法。避免时间延迟。
以上的解决方法只是暂时的解决了问题,并没有根本的解决问题,更优的方法是。
通过内存加载通过p2p处理
请问这两个方案,我们曾经是否都听到或用过呢,可是我们自己在设计的时候为何就没有运用到实际中呢,联系实际,根据已有的参考他人设计的优点,作为自己的起点,以终为始,这是我们要学习的。
下图是Mongodb数据库管理可视化页面
更详细的数据库操作,请查看我的往期 博客。

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