ameenkhan07

// C++ Structure 

/*The constructor initializes id to 42 when it's called. It's called an initliazation list.

In your example, it is equivalent to
*/

struct TestStruct {
    int id;

ameenkhan07

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

ameenkhan07

The papers included in CSE-586 reading.

Consensus and Paxos

• Paxos Made Moderately Complex. Robbert Van Renesse and Deniz Altinbuken, ACM Computing Surveys, 2015.
• Paxos made live - An engineering perspective. Tushar D. Chandra, Robert Griesemer, Joshua Redstone. ACM PODC, Pages: 398 - 407, 2007
• ZooKeeper: Wait-free coordination for internet-scale systems P. Hunt, M. Konar, F. P. Junqueira, and B. Reed USENIX ATC 2010.
• The Chubby Lock Service for Loosely-Coupled Distributed Systems. Mike Burrows, OSDI 2006.
• In Search of an Understandable Consensus Algorithm. Diego Ongaro, John Ousterhout, USENIX ATC, 2014.
• WPaxos: Wide Area Network Flexible Consensus. Ailidani Ailijiang, Aleksey Charapko, Murat Demirbas, Tevfik Kosar, IEEE TPDS, 2019.
• Dissecting the Performance of Strongly-Consistent Replication Protocols. Ailidani Ailijiang, Aleksey Charapko, Murat Demirbas, Sigmod 2019.

ameenkhan07

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

ameenkhan07

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

ameenkhan07

:100000000C9439030C9480030C9480030C948003AB
:100010000C9480030C9480030C9480030C94800354
:100020000C9480030C9480030C942B290C94FD29D0
:100030000C94FE1F0C9480030C9480030C9480039A
:100040000C9480030C9480030C9480030C94800324
:100050000C9480030C944B200C9480030C9480032C
:100060000C9480030C9480030C9480030C94800304
:100070000C9480030C9480030C9480030C948003F4
:100080000C9480030C9480030C9480030C948003E4
:100090000C9480030C9480030C9480030C948003D4