Profile

Cover photo
Jasey Wang
Works at Umeng
Lives in Beijing
1,579 followers|178,617 views
AboutPosts

Stream

Jasey Wang

Shared publicly  - 
 
We spent more than 6 months migrating our PBs data located in Beijing to Shanghai. This slide gives you a brief introduction about how we do it. The link *Umeng Operations Infrastructure & Practice* is here: http://www.slideshare.net/jaseywang/umeng-operations-infrastructure-practice
1
Add a comment...

Jasey Wang

Shared publicly  - 
 
Brief introduction to Umeng.com Operations Infrastructure & Practice. --- updates: 03/05/2015 Thanks to @TerryWang(http://www.slideshare.net/terrywang) who help to correct some grammar errors. Below is the original copy, feel free to comment: https://docs.google.com/presentation/d/1d1MAR8SClZDf8gjCNPuOeu63Fd83T-mzzqnqcTboAoY/edit?usp=sharing
1
1
Rongxing Liu's profile photo
 
发展速度超呼想象
 ·  Translate
Add a comment...

Jasey Wang

Shared publicly  - 
 
 
15 years ago (on Feb 1st, 1999) I first set foot in a Google datacenter. Well, not really -- in the Google cage in the Exodus datacenter in Santa Clara.  Larry had led me there for a tour (I wasn't an employee yet) and it was my first time in any datacenter.  And you couldn't really "set foot" in the first Google cage because it was tiny (7'x4', 2.5 sqm) and filled with about 30 PCs on shelves.  a1 through a24 were the main servers to build and serve the index and c1 through c4 were the crawl machines.

By that time we already had a second cage, immediately adjacent, that was about 3x larger and contained our first four racks, each containing 21 machines named d1-42 and f1-42 (don't ask me what happened to the b and e racks, I don't know).  I don't recall who manufactured d and f but they were trays with a single large motherboard and a Pentium II CPU.  (Later, the g rack would be the first corkboard rack.)

Some interesting details from the order:

- Yep, a megabit cost $1200/month and we had to buy two, an amount we didn't actually reach until the summer of 1999.  (At the time, 1 Mbps was roughly equivalent to a million queries per day.)

- You'll see a second line for bandwidth, that was a special deal for crawl bandwidth.  Larry had convinced the sales person that they should give it to us for "cheap" because it's all incoming traffic, which didn't require any extra bandwidth for them because Exodus traffic was primarily outbound.

- Note the handwritten "3 20 Amps in DC" change to the standard order form.  At the time, DC space was sold per square foot, and we always tried to get as much power with it as possible because that's what actually mattered.

- This particular building was one of the first colocation facilities in Silicon Valley.  Our direct neighbor was eBay, a bit further away was a giant cage housing DEC / Altavista, and our next expansion cage was directly adjacent to Inktomi.  The building has long since been shut down. 
1
Add a comment...

Jasey Wang

Shared publicly  - 
 
我把 #dylos 的数据按照 1h 一次的采样做了个表,记录了卧室从前天到目前为止 PM2.5/PM10 的情况,得出的结论就是只要一开门,空气质量就变差。
 ·  Translate
1
Add a comment...

Jasey Wang

Shared publicly  - 
 
Berkshire Hathaway Inc.
185,600.00 -153.00 (-0.08%)
Apr 7, 2014, 9:49 AM ET
Currency in USD - Disclaimer
1
Add a comment...

Jasey Wang

Shared publicly  - 
1
1
Add a comment...
Story
Tagline
http://jaseywang.me
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Beijing
Previously
Nanjing
Work
Occupation
SRE
Employment
  • Umeng
    SRE, 2011 - present
Basic Information
Gender
Male
Looking for
Friends
Relationship
In a relationship
Other names
jaseywang