三十之惑–面霸的八月(第一部分)

三十之惑

                              —面霸的八月

题记:

三十几岁了,从sina大学肄业后,在外面漂泊,不好不坏。

      从好的角度讲,这几年自己的技术没有减退,偶尔也还能够略有深入,同时能够更多的接触到产品、运营、甚至营销,而我自己也能够在很多场景下,不紧不慌,还算从容。从坏的角度讲,每一项都没有达到自己想要的成就。

从坏的角度讲,09年底从sina离职后,至今已经结束了第三份工作。

此次离职实非我愿,具体细节不好也不愿再细说,概括来讲是我作为小公司的技术管理人员虽尽力但仍没有能够让老板理解我在某项目中的安排,反而产生了误解,以致后来越来越多的误解到其爆发,刻意为难。虽有后来的歉意,但间隙已生,且无合适的解决方案,遂,今日失业之现状。

如果你看此文时心有戚戚,请到这里:https://me.alipay.com/chunshengster

好吧,下面正题,首先是“万达”

正题:面试

万达:

万达的推荐工作是一位认识了6-7年的猎头朋友推荐的,小姑娘爽快、伶俐,不好拒绝。坦言讲,我本人对万达还不了解,外面的传言里也大多是不好的,我仅仅是去试试看,职位是web主任开发工程师的职位,听起来也挺“高端”的嘛,当然最后发现整个过程被当作了一个乐子。

到万达下午3点半,20分钟做完题目,一道数据库设计的题目,一道询问熟悉的HTTP协议头及其含义,一道大数据量(千万级别数据)的数据库技术方案,一道所谓的大数据计算,还有两道算法题,其中算法题中有我认为最可耻的“求最大公约数”。

笔试结束,同一位小朋友口头沟通,大约一个半小时,当然,花了这么多时间跟我口水比较多有关系,因为每次看到小朋友木讷的眼神我都忍不住“好为人师”的深入讲解下去。

当然,我对万达和猎头在面试环节安排的人不满意,并将此意见表达给猎头,我觉得面试的人的水平和能力远在我之下,甚至不能对技术问题进行有效沟通。朋友戏谑,我在万达只是找了个“乐子”,实非我意,抱歉。

万达的面试是在周一。周二,我赶了两场:京东旗下的“网银在线”和“小米”。

网银在线:

网银在线的面试流程应该是在沈姓VP的授意下刻意调整的,沈直言,他对我不是面试,正常面试不是这样的流程,为此我深感荣幸和感激。首先是跟沈沟通我现在的情况,以及可能的工作内容和方式。沈给我的主观的感受是,直白、深刻,当然,经历的不同也让我略感压力,压力在于我对其部分判断不能确定是否“武断”,比如,10人团队和30人团队的管理方式上的确存在差别,我并不觉得我现在30人的团队管理是“哥们义气”的方式,当然,我也当面承认,在这30人的管理经历里,我非常幸运的是未遇到突发的管理难题(30team的管理经历我将在后面单独描述)。

同沈沟通的另一个问题是应用运维的方式以及利害。我也是在这个过程中,了解到阿里应用运维在整个业务经营体系中所占的重要性,其承载了开发(coding)和系统环境(软硬件)中间的沟通以及优化的工作,这项工作中有对业务模块、逻辑深入了解的必要,最好有开发的经历,同样需要对系统软硬件的承载能力有所了解深入,对我这种粗浅的理解来讲,就是“为每一双特别的脚定制一双舒适的鞋子”,当然要对这双脚和鞋子都有足够的了解才行。而我的优势在于,在需求分析、产品开发、系统运维、优化上都还蛮有经验,这是做好业务运维的最好的基础。后来我想我从08年在sina博客时开始,就已经开始从事这样的工作了,只不过sina叫产品线架构师。

当然,我也有提到,我在最近这半年系统优化过程中所使用的方法(优化方法和思路后面单独描述),包括简单的对google某篇论文中提到如何通过监控解决线上代码运行效率这一问题的理解(见参考1),包含这篇论文引用的 x-strace见参考2) 的理解。我提到了,在LAMP环境中,这些方式和机制几乎是天然存在的。有个难题是,网银在线是java的平台,我基本上没有接触过。

网银在线的二面是当前的运维负责人(抱歉我没有问具体的title),问了一些还算简单的服务器技术,如我在微博上提到的,很给面子。

三面是人力资源,小姑娘言语犀利,我有一说一,坦然面对并坦言自己不足,直言在人生规划中急需解决的问题。但在最后一次的离职原因上,当时我的确没想明白,也没办法说明白,这个问题在所有面试的过程中,一直在困扰着我。

面试结束后,在京东的大Logo旁请京东的同学拍了一张照片。赶赴小米。

本来周二下午约了潘少宁在车库咖啡,但是网银在线的同学打电话过来说只有周二他们集中面试,并且VP在,无奈,只好委屈潘,把跟潘的会面改到了周三上午。

我在写此面经的同时,给自己留了不少作业,我决定把这些技术方案也都一并写出来,算作面经的一部分。下节预报:小米两个部门的面试和百度文库的面试。

从今天开始,已经正式进入失业阶段,有钱朋友钱场,没钱的请拉朋友来捧个钱场:https://me.alipay.com/chunshengster

另:感谢 @震耳欲聋的沉默 提供“面霸的八月”这个名字

参考:

  1. Profiling: From single systems to data centers http://static.googleusercontent.com/external_content/untrusted_dlcp/research.google.com/ko//pubs/archive/36575.pdf
  2. X-Trace: A Pervasive Network Tracing Framework
    https://www.usenix.org/conference/nsdi-07/x-trace-pervasive-network-tracing-framework
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