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Top 5 Reasons Not to Use Hadoop for Analytics
As a former diehard fan of Hadoop, I LOVED the fact that you can work on up to Petabytes of data. I loved the ability to scale to thousands of nodes to process a large computation job. I loved the ability to store and load data in a very flexible format. In many ways, I loved Hadoop, until I tried to deploy it for analytics. That’s when I became disillusioned with Hadoop (it just "ain't all that"). At Quantivo, we’ve explored many ways to deploy H...
Cloud computing,Hadoop,Analytics 2012-04-17 13:43:26
Chrome extension manifest v2 migration to v3
In 2023, Google would not allow Chrome extensions with manifest version before v3 to be listed on Chrome web stores as v3 extensions add more security privacy related restrictions on some of the functions. Hence all extensions with manifest v2 must migrate to v3. In this post, we would show how we did the migration for one of our extensions and the changes made. There is a checklist provided by Chrome team on what needs to be updated so that the extension can still work in v3. It can be checked ...
CHROME EXTENSION,MANIFEST V3,MIGRATION 2022-09-24 10:44:54
Linux Clock : CST,UTC and NTP setup
1. There is an option when you set up clock on installing Linux: system clock users UTC, so what does UTC mean? It's Universal Time Coordinated(UTC), there are two different times in GPS system: one is UTC , the other one is LT(Local Time). The difference between these two is just the timezone difference, UTC is the time in timezone 0. If the local time in Beijing is 8 o'clock in the morning, then UTC time is 0 o'clock, which is a 8 hour difference. 2. In Linux, when we use date to check the tim...
Speed Hashing
A given hash uniquely represents a file, or any arbitrary collection of data. At least in theory. This is a 128-bit MD5 hash you're looking at above, so it can represent at most 2128 unique items, or 340 trillion trillion trillion. In reality the usable space is substantially less; you can start seeing significant collisions once you've filled half the space, but half of an impossibly large number is still impossibly large. Back in 2005, I wondered about the difference between a checksum and...
Speed hashing,Security,MD5 2012-04-07 10:35:15
Social media sharing codes
Social media is becoming a very important traffic source to one website. We can see social media share buttons or links in most websites ranging from news website to personal blogs. It is also a very important optimization area where many SEO experts recommend. There are many social medias we can share our links to such as Facebook and Twitter. Most of these website provide share button for us to easily integrate them into our websites, but these buttons usually have default styles(fixed size, f...
Social media,Share button,Cutomize 2013-07-18 23:12:45
Is Utah a good place for startups?
If you’re thinking of starting a business soon, then know that it’s a really good time to do so despite current circumstances. Rieva Lesonsky, a writer for the US Chamber of Commerce, highlights that today’s “new normal” has brought new customer demands and improved business technologies that you can take advantage of. In fact, many of the most successful businesses in the world, like Microsoft and Netflix, were created during an economic downturn. But this begs th...
MySQL Index Merge Optimization Practices
In production environment databases, it is often seen that some SQL where conditions include: equal condition on a normal index + primary key range query + order by limit Although using a normal index would be more efficient, the system chooses to use index merge instead in some cases. This article explores such index merge situations. Index Merge Official Introduction The Index Merge access method retrieves rows with multiple range scans and merges their results into one. Generall...
INDEX MERGE,MYSQL,PRIMARY INDEX,SECONDARY INDEX 2024-09-10 04:52:26
Eleven Equations True Computer Science Geeks Should (at Least Pretend to) Know
This idea is a complete rip off an article that appeared in Wired a little while ago and it got me thinking what would my list for Computer Science look like? Plus I thought it might be a fun post and unlike the Wired list this one goes to eleven. So here they are in no particular order: Binomial Coefficient The Binomial Coefficient equation generates Pascal’s Triangle and gives you the coefficients for the Binomial Theorem these ideas are often attributed to Pa...
Algorithms,Computer science,Euler formula,Fermat 2011-11-29 08:42:50
How to Create Custom Textures using Filters & Layers?
Textures are an important and integral part of the design world. You would find textures in every nook and corner of your life, in every space across your home. For a long time people have looked at Photoshop as a tool to manipulate photos and make them look the way you want it to appear. But, that’s not all to Photoshop. You can create interesting textures, and create amazing design works using Photoshop too. All you need is a design hand, and some basic understanding of how to use it. He...
Photoshop 2014-08-01 05:46:07
TowTruck from Mozilla Lab
TowTruck is a real time collaboration tool developed by Mozilla lab, it can enable users to do real time chat, voice chat in any webpage. Both sides can see each other's mouse position, it will produce animation when mouse clicked. The classical application for collaborative sides is users can discuss a document while reading the same document or modify some codes or fill up an application form. TowTruck is an open source project. It's very easy to deploy TowTruck, first you need to embed below ...
TowTruck,Mozillar Lab,HTML5 2013-04-15 12:23:13
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