alxv

6 ms·

1.
by alxv 8y ago
The 35mm format is rather amazing balance of design trade-offs. No wonder it is so enduring. It's large enough for the double-Gauss lens (a.k.a. normal prime lens) to have a nice shallow deep of field wide open. f/1.2 is close to
2.
by alxv 9y ago
You only need 2 processors, since each cores gives you 2 vCPUs. "For the n1 series of machine types, a virtual CPU is implemented as a single hardware hyper-thread" -- https://cloud.google.com/compute/docs&#x2F
3.
by alxv 9y ago
You are missing a crucial piece here to have consistent hashing: you also need hash the names of the servers. With consistent hashing you hash both the names of the requests and of the servers, then you assign the request to the server with
4.
by alxv 9y ago
There is a proof shown in this handout: https://people.eecs.berkeley.edu/~sinclair/cs271/n15.pdf It's hard to understand why this technique works so well without digging deep in the math. Roughly speaking,
5.
by alxv 9y ago
The method is called "Power of Two Random Choices " ( http://www.eecs.harvard.edu/~michaelm/postscripts/handbook20... ). And the two-choices paradigm is widely applicable beyond load balancing. In particu
6.
by alxv 9y ago
What happens when the number of servers changes? The cache hit rate would likely drop to zero until it warms up again, which is a good way to accidentally overload your systems. Load balancing based on consistent hashing is the better way t
7.
by alxv 10y ago
If your employer 401k plan allows it, you can roll over after-tax 401k contributions to a Roth IRA (a.k.a. mega-backdoor Roth IRA).
8.
by alxv 10y ago
Sorry, it turns that was misunderstanding from my part. It turns out we cannot solve a board row by row without revisiting the previous rows. The board below is a counterexample: 101 010 100 The first and second rows are solved.
9.
by alxv 10y ago
For every boards are two chessboard patterns we can solve for. For example, for a 3x3 board we can have: 101 010 010 or 101 101 010 where 1 is a white square and 0 is a black square. We can represent any N×N boa
10.
by alxv 10y ago
Like Lights Out, this game can be solved using Gaussian elimination over Z/2 (integers modulo 2). This means the order of the tiles you press do not matter, and that you can solve the board by forming the desired pattern row by row.
11.
by alxv 10y ago
During the winter, most fresh vegetables in Canada are imported from Mexico and the US. These are mostly breed for shelf life and usually bland. In the summer, local fruit and vegetable can be quite tasty if you know where to shop. The publ
12.
by alxv 10y ago
On the other hand, the bland stuff doesn't poison you as much with lead. http://www.environmentalhealthnews.org/ehs/news/lead-in-vine...
13.
by alxv 10y ago
In the U.S., Californian olive oils are your best bet. Otherwise, Costco Kirkland Signature olive oil (which is now Greek oil [1]) is another good choice. Outside of Italy, it's difficult to find Italian olive oils that are not blended
14.
by alxv 11y ago
Previous discussion: https://news.ycombinator.com/item?id=10330280
15.
by alxv 11y ago
"Don't be evil" is still included in Google's code of conduct. https://investor.google.com/corporate/google-code-of-conduct...
16.
by alxv 11y ago
There is a very succinct implementation of Algorithm X in Python that uses a variation of the Dancing Links approach. http://www.cs.mcgill.ca/~aassaf9/python/algorithm_x.html http://www.cs.mcgill.ca&#x2
17.
by alxv 11y ago
Google runs a company-wide disaster recovery testing event every year. Earthquakes are among the numerous scenarios simulated. https://queue.acm.org/detail.cfm?id=2371516
18.
by alxv 11y ago
That's with resources cached. HTTP Status 304 means the resource was not modified, and thus can be retrieved from the local cache.
19.
by alxv 12y ago
A/A tests (also known as Null tests) are useful to validate that users are assigned to the control and experiment groups without bias. Offline resampling methods, like bootstrapping, are better if you're looking to robustly estima
20.
by alxv 12y ago
You can read the article if you come from a Google search. http://www.google.com/url?q=http%3A%2F%2Fwww.medscape.com%2F...
21.
by alxv 13y ago
By that logic, why consumers should pay anything to ISPs? ISPs don't have obligations to sign free peering agreements to CDNs or other large network owners, like Netflix, if it isn't advantageous to them. Large network owners agre
22.
Python 3.4 Beta 1 Released(python.org)
89 points by alxv 13y ago|28 comments
23.
by alxv 14y ago
Oh right... because putting your critical secret information into a huge, buggy, extensible, unaudited, complex, and constantly changing operating system is so much better!
24.
by alxv 14y ago
Space would be a terrible environment for building a datacenter. The main goals of a datacenter is to make computation as cheap, as fast and as reliable as possible. Having the datacenter orbit around Earth would not help us accomplish any
25.
by alxv 14y ago
His query took 65 milliseconds , not 65 seconds, which is totally reasonable.
26.
by alxv 14y ago
There is a way to harden pickle to protect it against the most basic exploits: http://docs.python.org/py3k/library/pickle.html#restricting-... It is not a complete solution, as an attacker could still DoS your service by making pickle all
27.
by alxv 14y ago
> Somebody said once the ultimate app would help people get laid. I've first heard that from an old jwz rant. http://www.jwz.org/doc/groupware.html
28.
by alxv 14y ago
> Create a random board configuration. Exhaustively explore the search space to find whether this is a win +1, lose -1, or draw 0 for Player 1 Given that the search space can grow O(4^mn), this can be done only for endgame configuratio
29.
by alxv 14y ago
But how do you get the malware on the servers? Most malware spread by tricking unsophisticated users into install them. It is much harder to trick a system administrator to so. Exploiting a vulnerable public facing service is the alternativ
30.
by alxv 14y ago
I've found the video of him saying that at StartupSchool http://www.justin.tv/startupschool/b/298808358 Seek at 9:30.

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