nishantvyas

9 ms·

31.
by nishantvyas 7y ago
missing link?
32.
by nishantvyas 7y ago
In another CNBC news, “More than one in five (21 percent) don't save any of their annual income.” Source: https://www.google.com/amp/s/www.cnbc.com/amp/2019/03/14/her...
33.
by nishantvyas 7y ago
basically locking will create the serializability for that document... so if there are concurrent updates on mongo side it will have to wait... also for step-1 in dual write it should be automic/two-phase between mongo and RDBMS.
34.
by nishantvyas 7y ago
you mean the result set or the query it-self? databases like oracle, mysql, postgres can already identify existing queries and hash it to re-use execution plan etc... some can even convert literals in queries into bind.. generally seeking u
35.
by nishantvyas 7y ago
real question is, why do you need a distributed relational database? when it comes to scale (both in size, QPS, latency) existing RDBMS would just do fine for 95% use-cases. For very small use-cases where you would absolutely need distribu
36.
by nishantvyas 7y ago
1) start with dual-write to both the DBs for all the writes. 2) all reads from Mongo 3) in the background start data migration, one key/document at a time; transform Mongo document into RDBMS table/rows and insert... have mongo do
37.
by nishantvyas 7y ago
It depends, what you define as database. is it only the SORs (Statement of Records) or everything from Cache, KV store to RDBMS? Let's just say everything, I believe it would be in range of 300-500 trillion queries every day.
38.
by nishantvyas 7y ago
for multi-tenancy users(=customers) there are 3 main solutions, 1) Single DB with a) dedicated table per user or b) shared table with column that identify the user 2) Dedicated Schema for every user. 3) Dedicated DB for every users. there i
39.
by nishantvyas 7y ago
"best iPhone ever" is never an inaccurate statement, subjectively speaking (compared to previous release of iPhone), if you think about it. :-)
40.
by nishantvyas 7y ago
https://www.youtube.com/watch?v=9SexsvIO4vE internet is full of these examples. My point is, computer with, - more data, (historic on how to act on certain situation, live data for event i.e. sensor data, lidar/radar
41.
by nishantvyas 7y ago
Yes. point about the charges would be a thing, something that should be debated... would "use at your own risk" vindicate the company behind autonomous vehicle? or owner is responsible for his vehicle's actions? i guess never
42.
by nishantvyas 7y ago
Correct. It’s amazing, how much forgiving we can be for human errors ( accidents every year) but absolutely not for machine/autonomous vehicles, even when, statistically speaking, machines may make better decision much faster(or at-lea
43.
by nishantvyas 7y ago
Things that would work in favor of Column Store (like Cassandra or MariaDB ColumnStore or Redshift etc), - Everything stored in one table/collection, with 100+ columns/fields - Many columns will have numerous duplicate values (oft
44.
by nishantvyas 7y ago
What is "financial" open source databases?
45.
by nishantvyas 7y ago
I posted it here, yesterday, https://news.ycombinator.com/item?id=20509984
46.
Scaling Database Access to Billions of Queries at PayPal: Introducing HERA(medium.com)
4 points by nishantvyas 7y ago|0 comments
47.
by nishantvyas 7y ago
Going to vendor's website always have comparisons that claims, it can do everything that the competitor's can not. What I'd also like to know is limitations. Where it's not a good idea to use a product? This would help m
48.
by nishantvyas 7y ago
I don't get this... Poker isn't pure mathematical... it has emotions involved (greed, fear, belief, reading others, manipulations (to fool the opponent)... and may be more... and all of these emotions arises differently for differ
49.
by nishantvyas 7y ago
Does enforcement changes behavior? I guess the time will tell. But I do expect some insurance companies start selling GDPR coverage policies soon.
50.
by nishantvyas 7y ago
Pre-cursor: 1. Don't assume anything 2. Don't take anything personally. Can you help understand what's wrong in that statement, "In the 1st quarter, we registered one accident for every 2.87 million mil
51.
Amtrak lost money every year since 1971 – here's why train are so expensive(businessinsider.com)
23 points by nishantvyas 8y ago|24 comments
52.
by nishantvyas 8y ago
Smart phone industry will soon enter its adolescent and will show the sign of maturity. Also, smart phones became (or sold as) fashion device compared to computing devices (like computers, laptops etc) in previous decade, which were more li
53.
by nishantvyas 8y ago
"Solo founders are twice as likely to succeed in business as co-founders" by research from Jason Greenberg, PhD ’09, and Ethan Mollick, PhD ’10 and MBA ’04. :-) hmmm... co-researchers to research on NO need of co-researchers/
54.
Converse sneakers or slippers?(businessinsider.com)
2 points by nishantvyas 8y ago|0 comments
55.
by nishantvyas 8y ago
As we live more urban with growing population, solution like bikes, cycles, skate boards, scooters (lime etc) and of-course more people on foot... will emerge... we will see how old rules play out then...
56.
Jaywalking: How the car industry outlawed crossing the road(bbc.com)
3 points by nishantvyas 8y ago|2 comments
57.
by nishantvyas 8y ago
timing the time is impossible for any market. It's easy to be contrarian but hard to be a contrarian that will be right (on time). Reality is no one really knows, what will break the camel's back!
58.
by nishantvyas 8y ago
very famous investor once said, unless your startup has one of "Seven deadly sins"; its hard to be sticky (or successful). So if one is planning around tech addiction, make it about, pride & envy not about how its good for you
59.
by nishantvyas 8y ago
it depends. Are you raising the chicken for egg or meat? Egg is about sustainability... meat is about growth (very fast)...
60.
by nishantvyas 8y ago
So to summarize, they have "10-Person Marketing Team" spending 93k/month total, with 2 major breakouts, 1. Teammate Expenses (73,225 + 9,402 + 367) = ~83K 2. Everything Else (or Actual Marketing) = ~10k Why do they need 10 p

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