Don't use car for comparison. Everyone knows car in US is much cheaper than in China. But from the other side, if you earn 700K RMB in China, you can hire Ayi or you can have dinner in a decent restaurant veryday. How's about NY with 200K USD? So there are something more expensive in US, and other things more expensive in China. Don't just use one case for the comparison.
【在 y*******n 的大作中提到】 : Don't use car for comparison. Everyone knows car in US is much cheaper than : in China. : But from the other side, if you earn 700K RMB in China, you can hire Ayi or : you can have dinner in a decent restaurant veryday. How's about NY with 200K : USD? : So there are something more expensive in US, and other things more expensive : in China. Don't just use one case for the comparison.
【在 y*******n 的大作中提到】 : Don't use car for comparison. Everyone knows car in US is much cheaper than : in China. : But from the other side, if you earn 700K RMB in China, you can hire Ayi or : you can have dinner in a decent restaurant veryday. How's about NY with 200K : USD? : So there are something more expensive in US, and other things more expensive : in China. Don't just use one case for the comparison.
w*6
91 楼
奔驰Exxx就是必须的?
【在 f***8 的大作中提到】 : 你的说法更不靠谱,比生活成本,主要是比普通一个比如3口之家的生活必须支出,请 : 个阿姨,在外吃饭等,是可有可无的。普通家庭,就四件大事,衣食住行(这个没人反 : 对吧?),同等的质量,中美哪个成本低,大家心里都有数。 : : than : or : 200K : expensive
Assume a family with 3 persons and only one works, and rents a 2 bedrooms condo. Bay area in US, and Hangzhou in China. 200K USD in US, 130K left after tax, not sure. House rent: 2000 / month Kid: 1000 / month Basic necessities: 1000 / month Left: 80K USD / year 700K RMB in China, 500K left after tax. House rent: 4000 / month Kid: 1000 / month Basic necessities: 2000 / month Left: 420K RMB / year No travel, no eating outside, no party, no hospital, no others. Not that much different.
【在 f***8 的大作中提到】 : 你的说法更不靠谱,比生活成本,主要是比普通一个比如3口之家的生活必须支出,请 : 个阿姨,在外吃饭等,是可有可无的。普通家庭,就四件大事,衣食住行(这个没人反 : 对吧?),同等的质量,中美哪个成本低,大家心里都有数。 : : than : or : 200K : expensive
y*n
101 楼
I don't think your university is so important after several years work. What you have and what you can already can be reflected from your work experience. For this case, I can imagine this guy should be very familiar with this industry, for he worked as a sales person for several years, and transferred to PM. He knows a lot of what the customers want, and can define the product. I don't think the university is so much important for this case. If you graduated from such an university, whether you can do better than him?
【在 y*******n 的大作中提到】 : Assume a family with 3 persons and only one works, and rents a 2 bedrooms : condo. Bay area in US, and Hangzhou in China. : 200K USD in US, 130K left after tax, not sure. : House rent: 2000 / month : Kid: 1000 / month : Basic necessities: 1000 / month : Left: 80K USD / year : 700K RMB in China, 500K left after tax. : House rent: 4000 / month : Kid: 1000 / month
【在 y*******n 的大作中提到】 : Assume a family with 3 persons and only one works, and rents a 2 bedrooms : condo. Bay area in US, and Hangzhou in China. : 200K USD in US, 130K left after tax, not sure. : House rent: 2000 / month : Kid: 1000 / month : Basic necessities: 1000 / month : Left: 80K USD / year : 700K RMB in China, 500K left after tax. : House rent: 4000 / month : Kid: 1000 / month
【在 y*******n 的大作中提到】 : Don't use car for comparison. Everyone knows car in US is much cheaper than : in China. : But from the other side, if you earn 700K RMB in China, you can hire Ayi or : you can have dinner in a decent restaurant veryday. How's about NY with 200K : USD? : So there are something more expensive in US, and other things more expensive : in China. Don't just use one case for the comparison.
Tell me what kind of prestigious status you enjoy as a 码农 in the Bay Area? The stereotypical thinking that technical guys are tools is universal. Why don't you see many white American guys do coding?
别人会认为我正在从事一项正常的,主流的工作(而不是受人鄙视的, 边缘化的工作) IT行业作为bay area的头号主流行业, 能够比普通technical guys更高级的,也就是 老板们, 而不是什么体制内/公务员 I have seen too many white american guys do coidng. Too many
Area?
【在 s*******i 的大作中提到】 : Tell me what kind of prestigious status you enjoy as a 码农 in the Bay Area? : The stereotypical thinking that technical guys are tools is universal. Why : don't you see many white American guys do coding?
【在 c********u 的大作中提到】 : 别人会认为我正在从事一项正常的,主流的工作(而不是受人鄙视的, 边缘化的工作) : IT行业作为bay area的头号主流行业, 能够比普通technical guys更高级的,也就是 : 老板们, 而不是什么体制内/公务员 : I have seen too many white american guys do coidng. Too many : : Area?
http://rdc.taobao.com/blog/cs/?p=128#more-128 " TFS的性能参数 TFS在淘宝的部署环境中前端有两层缓冲,到达TFS系统的请求非常离散,所以TFS内部 是没有任何数据的内存缓冲的,包括传统文件系统的内存缓冲也不存在。我们主要的性 能参数不是IO吞吐量,而是单台PCServer提供随机读写IOPS。" TFS layer 没有 data buffer, 是怎么实现 single PC Server random I/O 优化的? Given regular HDD
“TFS,Taobao File System,淘宝内部使用的分布式文件系统,主要针对海量小文件 的随机读写访问性能做了特殊优化,承载着淘宝主站所有图片、商品描述等数据的存储 。” 这个没有什么问题,就是一个图片服务器集群,类似Apache之类的静态文件服务器,前 两级用海量的内存cache,最后miss掉的请求到达文件服务器,所以文件服务器本身不 需要什么内存cache。 And you misunderstand this how?
【在 j********x 的大作中提到】 : 这显然是说客户端请求分布分散,cache意义不大,读写的bursty traffic比较高 : 啥叫single pc server random io 优化,这种分布式文件系统,谈什么single pc,还 : 要random,你对这个领域的理解跟我不同啊 : : ?
j*x
176 楼
其实我没看这些大概也能猜到这个样子,tfs不做cache,交给client或者别的系统 “And you misunderstand this how?” 这话我看不懂,点解?
【在 r****s 的大作中提到】 : “TFS,Taobao File System,淘宝内部使用的分布式文件系统,主要针对海量小文件 : 的随机读写访问性能做了特殊优化,承载着淘宝主站所有图片、商品描述等数据的存储 : 。” : 这个没有什么问题,就是一个图片服务器集群,类似Apache之类的静态文件服务器,前 : 两级用海量的内存cache,最后miss掉的请求到达文件服务器,所以文件服务器本身不 : 需要什么内存cache。 : And you misunderstand this how?
s*k
177 楼
那你可以把你的技术blog开出来给我们敬仰一下
【在 j********x 的大作中提到】 : 陈浩已然是过街的耗子了。。。
s*r
178 楼
single pc server random io 作为 performance metrics 是网站上写的, 不是我写的。 对于分布式系统,大量的 random 小写数据访问流并没有问题,对于网站是显然的。
【在 j********x 的大作中提到】 : 这显然是说客户端请求分布分散,cache意义不大,读写的bursty traffic比较高 : 啥叫single pc server random io 优化,这种分布式文件系统,谈什么single pc,还 : 要random,你对这个领域的理解跟我不同啊 : : ?
s*r
179 楼
前两级的 data buffer 作为 random I/O merge 优化,那是显然的。 具体到性能测试数据, 就不能用 single pc server random access 来衡量性能了。因为 data access pattern 已经在前两层优化掉了。 如果要,最好把 TFS 和 cache server 作为一个system 来算 random I/O per data node,就看上去比较有说服力。 不过,这不是什么big deal, 反正这些技术都很成熟,大家都知道。系统的设计更多的 考虑是 scalability,本质上就是确保产出和所砸向硬件设备的货币,最好是linear 关系。 大家只是随便的讨论讨论,肯定都还有各自更好的东西。
【在 r****s 的大作中提到】 : “TFS,Taobao File System,淘宝内部使用的分布式文件系统,主要针对海量小文件 : 的随机读写访问性能做了特殊优化,承载着淘宝主站所有图片、商品描述等数据的存储 : 。” : 这个没有什么问题,就是一个图片服务器集群,类似Apache之类的静态文件服务器,前 : 两级用海量的内存cache,最后miss掉的请求到达文件服务器,所以文件服务器本身不 : 需要什么内存cache。 : And you misunderstand this how?
Don't use car for comparison. Everyone knows car in US is much cheaper than in China. But from the other side, if you earn 700K RMB in China, you can hire Ayi or you can have dinner in a decent restaurant veryday. How's about NY with 200K USD? So there are something more expensive in US, and other things more expensive in China. Don't just use one case for the comparison.
【在 y*******n 的大作中提到】 : Don't use car for comparison. Everyone knows car in US is much cheaper than : in China. : But from the other side, if you earn 700K RMB in China, you can hire Ayi or : you can have dinner in a decent restaurant veryday. How's about NY with 200K : USD? : So there are something more expensive in US, and other things more expensive : in China. Don't just use one case for the comparison.
【在 y*******n 的大作中提到】 : Don't use car for comparison. Everyone knows car in US is much cheaper than : in China. : But from the other side, if you earn 700K RMB in China, you can hire Ayi or : you can have dinner in a decent restaurant veryday. How's about NY with 200K : USD? : So there are something more expensive in US, and other things more expensive : in China. Don't just use one case for the comparison.
w*6
301 楼
奔驰Exxx就是必须的?
【在 f***8 的大作中提到】 : 你的说法更不靠谱,比生活成本,主要是比普通一个比如3口之家的生活必须支出,请 : 个阿姨,在外吃饭等,是可有可无的。普通家庭,就四件大事,衣食住行(这个没人反 : 对吧?),同等的质量,中美哪个成本低,大家心里都有数。 : : than : or : 200K : expensive
Assume a family with 3 persons and only one works, and rents a 2 bedrooms condo. Bay area in US, and Hangzhou in China. 200K USD in US, 130K left after tax, not sure. House rent: 2000 / month Kid: 1000 / month Basic necessities: 1000 / month Left: 80K USD / year 700K RMB in China, 500K left after tax. House rent: 4000 / month Kid: 1000 / month Basic necessities: 2000 / month Left: 420K RMB / year No travel, no eating outside, no party, no hospital, no others. Not that much different.
【在 f***8 的大作中提到】 : 你的说法更不靠谱,比生活成本,主要是比普通一个比如3口之家的生活必须支出,请 : 个阿姨,在外吃饭等,是可有可无的。普通家庭,就四件大事,衣食住行(这个没人反 : 对吧?),同等的质量,中美哪个成本低,大家心里都有数。 : : than : or : 200K : expensive
y*n
311 楼
I don't think your university is so important after several years work. What you have and what you can already can be reflected from your work experience. For this case, I can imagine this guy should be very familiar with this industry, for he worked as a sales person for several years, and transferred to PM. He knows a lot of what the customers want, and can define the product. I don't think the university is so much important for this case. If you graduated from such an university, whether you can do better than him?
【在 y*******n 的大作中提到】 : Assume a family with 3 persons and only one works, and rents a 2 bedrooms : condo. Bay area in US, and Hangzhou in China. : 200K USD in US, 130K left after tax, not sure. : House rent: 2000 / month : Kid: 1000 / month : Basic necessities: 1000 / month : Left: 80K USD / year : 700K RMB in China, 500K left after tax. : House rent: 4000 / month : Kid: 1000 / month
【在 y*******n 的大作中提到】 : Assume a family with 3 persons and only one works, and rents a 2 bedrooms : condo. Bay area in US, and Hangzhou in China. : 200K USD in US, 130K left after tax, not sure. : House rent: 2000 / month : Kid: 1000 / month : Basic necessities: 1000 / month : Left: 80K USD / year : 700K RMB in China, 500K left after tax. : House rent: 4000 / month : Kid: 1000 / month
【在 y*******n 的大作中提到】 : Don't use car for comparison. Everyone knows car in US is much cheaper than : in China. : But from the other side, if you earn 700K RMB in China, you can hire Ayi or : you can have dinner in a decent restaurant veryday. How's about NY with 200K : USD? : So there are something more expensive in US, and other things more expensive : in China. Don't just use one case for the comparison.
Tell me what kind of prestigious status you enjoy as a 码农 in the Bay Area? The stereotypical thinking that technical guys are tools is universal. Why don't you see many white American guys do coding?
别人会认为我正在从事一项正常的,主流的工作(而不是受人鄙视的, 边缘化的工作) IT行业作为bay area的头号主流行业, 能够比普通technical guys更高级的,也就是 老板们, 而不是什么体制内/公务员 I have seen too many white american guys do coidng. Too many
Area?
【在 s*******i 的大作中提到】 : Tell me what kind of prestigious status you enjoy as a 码农 in the Bay Area? : The stereotypical thinking that technical guys are tools is universal. Why : don't you see many white American guys do coding?
【在 c********u 的大作中提到】 : 别人会认为我正在从事一项正常的,主流的工作(而不是受人鄙视的, 边缘化的工作) : IT行业作为bay area的头号主流行业, 能够比普通technical guys更高级的,也就是 : 老板们, 而不是什么体制内/公务员 : I have seen too many white american guys do coidng. Too many : : Area?
http://rdc.taobao.com/blog/cs/?p=128#more-128 " TFS的性能参数 TFS在淘宝的部署环境中前端有两层缓冲,到达TFS系统的请求非常离散,所以TFS内部 是没有任何数据的内存缓冲的,包括传统文件系统的内存缓冲也不存在。我们主要的性 能参数不是IO吞吐量,而是单台PCServer提供随机读写IOPS。" TFS layer 没有 data buffer, 是怎么实现 single PC Server random I/O 优化的? Given regular HDD
“TFS,Taobao File System,淘宝内部使用的分布式文件系统,主要针对海量小文件 的随机读写访问性能做了特殊优化,承载着淘宝主站所有图片、商品描述等数据的存储 。” 这个没有什么问题,就是一个图片服务器集群,类似Apache之类的静态文件服务器,前 两级用海量的内存cache,最后miss掉的请求到达文件服务器,所以文件服务器本身不 需要什么内存cache。 And you misunderstand this how?
【在 j********x 的大作中提到】 : 这显然是说客户端请求分布分散,cache意义不大,读写的bursty traffic比较高 : 啥叫single pc server random io 优化,这种分布式文件系统,谈什么single pc,还 : 要random,你对这个领域的理解跟我不同啊 : : ?
j*x
384 楼
其实我没看这些大概也能猜到这个样子,tfs不做cache,交给client或者别的系统 “And you misunderstand this how?” 这话我看不懂,点解?
【在 r****s 的大作中提到】 : “TFS,Taobao File System,淘宝内部使用的分布式文件系统,主要针对海量小文件 : 的随机读写访问性能做了特殊优化,承载着淘宝主站所有图片、商品描述等数据的存储 : 。” : 这个没有什么问题,就是一个图片服务器集群,类似Apache之类的静态文件服务器,前 : 两级用海量的内存cache,最后miss掉的请求到达文件服务器,所以文件服务器本身不 : 需要什么内存cache。 : And you misunderstand this how?
s*k
385 楼
那你可以把你的技术blog开出来给我们敬仰一下
【在 j********x 的大作中提到】 : 陈浩已然是过街的耗子了。。。
s*r
386 楼
single pc server random io 作为 performance metrics 是网站上写的, 不是我写的。 对于分布式系统,大量的 random 小写数据访问流并没有问题,对于网站是显然的。
【在 j********x 的大作中提到】 : 这显然是说客户端请求分布分散,cache意义不大,读写的bursty traffic比较高 : 啥叫single pc server random io 优化,这种分布式文件系统,谈什么single pc,还 : 要random,你对这个领域的理解跟我不同啊 : : ?
s*r
387 楼
前两级的 data buffer 作为 random I/O merge 优化,那是显然的。 具体到性能测试数据, 就不能用 single pc server random access 来衡量性能了。因为 data access pattern 已经在前两层优化掉了。 如果要,最好把 TFS 和 cache server 作为一个system 来算 random I/O per data node,就看上去比较有说服力。 不过,这不是什么big deal, 反正这些技术都很成熟,大家都知道。系统的设计更多的 考虑是 scalability,本质上就是确保产出和所砸向硬件设备的货币,最好是linear 关系。 大家只是随便的讨论讨论,肯定都还有各自更好的东西。
【在 r****s 的大作中提到】 : “TFS,Taobao File System,淘宝内部使用的分布式文件系统,主要针对海量小文件 : 的随机读写访问性能做了特殊优化,承载着淘宝主站所有图片、商品描述等数据的存储 : 。” : 这个没有什么问题,就是一个图片服务器集群,类似Apache之类的静态文件服务器,前 : 两级用海量的内存cache,最后miss掉的请求到达文件服务器,所以文件服务器本身不 : 需要什么内存cache。 : And you misunderstand this how?