dandv + database   113

RebirthDB/rebirthdb: The open-source database for the realtime web.
"RebirthDB is a community-developed fork of RethinkDB which was the first open-source scalable database built for realtime applications. It exposes a new database access model -- instead of polling for changes, the developer can tell the database to continuously push updated query results to applications in realtime."

* NoSQL database that stores schemaless JSON documents
* Distributed database that is easy to scale
* High availability database with automatic failover and robust fault tolerance

Via https://github.com/rethinkdb/rethinkdb/issues/6698

See also gun.eco
realtime  database  web  JavaScript  Firestore  alternative 
august 2018 by dandv
Distributed Counters  |  Firebase
"In Cloud Firestore, you can only update a single document about once per second, which might be too low for some high-traffic applications."

Confirmed at https://firebase.google.com/docs/firestore/quotas#writes_and_transactions

It's not a plan limitation. You can't pay to remove it.

Workaround: create "shards". WTF.
against  Firestore  database  limitation  Firebase 
february 2018 by dandv
Top10 Time Series Databases
DalmatinerDB is #1, InfluxDB is second. No mention of AxiBase.
time  series  database  reviews  InfluxDB  alternative 
january 2017 by dandv
InfluxDB Tops Cassandra in Time-Series Data & Metrics Benchmark | InfluxData
InfluxDB outperformed Cassandra in all three tests with 4.5x greater write throughput, while using 10.8x less disk space, and delivering up to 168x faster response times for tested queries.

Though it provides excellent tools for building a scalable, distributed InfluxDB database, Cassandra lacks most key features of a time series database.
against  Cassandra  time  series  database  benchmark 
september 2016 by dandv
This Team Used Apache Cassandra... You Won't Believe What Happened Next | Parse.ly
[[We also find the technology to very much violate the “principle of least surprise” — indeed, almost every Cassandra feature has some surprising behavior.

But what about time series and analytics data? The funny thing about Parse.ly’s use of Cassandra is that our original adoption of it was driven by the desire to utilize its “time series analytics” capabilities. But it turns out, without any capability to group, filter, or aggregate (the core functions of any OLAP system), Cassandra simply could not play that role.]]
against  Cassandra  time  series  database  scalability 
september 2016 by dandv
JavaScript library wrapping IndexedDB and WebSQL, with fallback to localStorage for old browsers (incl. Safari mobile)
* simple API: setItem, getItem, removeItem, iterate
* ES6 Promises support
* can implement custom driver, see https://github.com/localForage/localForage/wiki/Custom-Drivers

See http://dexie.org/ for a library with more advanced querying.
offline  local  browser  storage  IndexedDB  alternative  webdev  database  JavaScript  library 
june 2016 by dandv
MyFitnessPal | Report inaccurate food information in the database
"Currently in our mobile apps, many of these features are not yet available - you can't view how many times an item has been confirmed, or edit items to provide the correct information. We hope to add these features in the future, along with additional methods to ensure that our nutritional information is both accurate and complete."
MyFitnessPal  mobile  app  limitations  report  incorrect  food  database  nutrition  data 
february 2016 by dandv
Database configuration issues expose 191 million voter records | CSO Online
Largest breach yet?

"The database contains a voter's full name (first, middle, last), their home address, mailing address, a unique voter ID, state voter ID, gender, date of birth, date of registration, phone number, a yes/no field for if the number is on the national do-not-call list, political affiliation, and a detailed voting history since 2000. In addition, the database contains fields for voter prediction scores."

See also http://www.csoonline.com/article/3018592/security/database-configuration-issues-expose-191-million-voter-records.html
data  leak  breach  voter  records  hack  database 
december 2015 by dandv
More Mongo than Mongo
"The surprising part of HyperDex's Mongo veneer is that the resulting system not only has stronger consistency and fault-tolerance guarantees as well as features such as ACID transactions over multiple keys, but it's also faster than Mongo."

"HyperDex provides strong consistency in all configurations. Every object retrieval will always return the latest written object. There's no need to tune journal parameters, write concern, write timeout or the dozen other parameters that MongoDB requires be set correctly."

What's the catch?

"It's definitely the case that there are many tradeoffs in distributed system design, and that features often come at the expense of other features within the same code base.

But to claim that one system must always have some weakness compared to another is to assume an equivalence among implementations, and there is no sound basis for such an assumption. The same way quick sort is better than bubble sort, a second generation computer program can easily be, and often is, better than first-generation alternatives across the board."

Version 1.7 added Node.js bindings.
against  MongoDB  alternative  HyperDex  document  database  ACID 
june 2015 by dandv
Search by satiety nutritional completeness - NutritionData.com
Very cool search for most filling or nutritious foods.

http://nutritiondata.self.com/tools/nutrient-search searches for foods highest in X and lowest in Y, among categories.
nutrition  food  database  search  nutrient  calorie  fullness 
march 2015 by dandv
Numbeo - The biggest Internet Database about Cost of Living, Housing Indicators and many other informations about cities and countries!
Aggregate cost of living, property prices, healthcare, pollution, traffic, quality of life from user-entered submissions.
world  living  cost  safety  crime  database  statistics  crowdsourcing 
march 2015 by dandv
Meteor reactive database layer with references, generators, triggers, migrations, etc.

Implemented features are:
* reactive references between documents
* reactive reverse references between documents
* reactive auto-generated fields from other fields
* reactive triggers
* migrations

Planned features are:
* versioning of all changes to documents
* integration with full-text search
* strict-typed schema validation
Meteor  reactive  database 
january 2015 by dandv
Hosted cloud search as a service | Algolia
API calls to index your data (<10KB JSON records), then search for it fast, with typo autocorrection.

"Algolia Search provides hosted full-text, numerical, faceted and geolocalized search."
search  service  database 
december 2014 by dandv
Why is MongoDB wildly popular? It’s a data structure thing.
“Show me your code and conceal your data structures, and I shall continue to be mystified. Show me your data structures, and I won’t usually need your code; it’ll be obvious.” – Eric Raymond, in The Cathedral and the Bazaar, 1997

"What’s MongoDB good for? Graphs: just objects and pointers – a perfect fit"
MongoDB  object  relational  impedance  mismatch  database  NoSQL 
november 2014 by dandv
Meteor: Gallery
Web apps built with Meteor. Appears vastly out of date as of Oct 2014.

Check spotting.meteor.com instead.
Meteor  apps  gallery  list  database 
october 2014 by dandv
JavaScript component library
Small JavaScript server and client-side utilities (vs. large libraries like jQuery). E.g. string distance, number formatting, date utilities, DOM interactions, UI elements, CSS transitions

Differs somewhat from what's published at http://component.io/
JavaScript  library  component  database  utilities 
february 2014 by dandv
US Coast Guard - vessels by name
Search for boats over 5 tons. Try "BAL0001".

For a direct link, use the USCG Doc. No., e.g. http://www.st.nmfs.noaa.gov/pls/webpls/cgv_pkg.vessel_id_list?vessel_id_in=1243693
USCG  Coast  Guard  vessel  database  search  ship  boat 
october 2013 by dandv
Combined DNA Index System - Wikipedia, the free encyclopedia
12 million profiles (10M of offenders) as of January 2013. The largest DNA database in the world.
DNA  database  USA  police  state  awareness 
july 2013 by dandv
The Retail Equation - For Consumers
Return abuse is a form of “friendly fraud” where someone purchases products without intending to keep them. Perhaps the most well-known form of this abuse is “wardrobing” or “renting” – in which the person makes a purchase, uses the product(s), and then returns or exchanges the merchandise.

Get the report on you.
returns  database  product  return  report 
february 2013 by dandv
Unbiased Information on Supplements & Nutrition | Examine.com
Database of studies on supplements, manically researched and compiled by four editors. "We currently have over 12000 references to scientific papers."

Uses Twitter Bootstrap.
supplements  research  database  reference  cool  nutrition  health  reviews 
january 2013 by dandv
Well-organized and maintained database of accelerator programs.
cool  database  program  accelerator  fund  seed 
january 2013 by dandv
Skin Deep® Cosmetics Database | Environmental Working Group
Database of 75,000 cosmetics and potential toxic chemicals in them.
skin  database  chemicals  toxic  health  cosmetics 
august 2012 by dandv
Water filter database buying guide | Environmental Working Group
Database of water filters searchable by type (faucet-mounted, pitcher etc.), technology (carbon block, reverse osmosis etc.) and certified contaminant to remove.
search  database  guide  buying  filter  water 
august 2012 by dandv
freesound - free audio clips
Creative Commons license most often. Bugmenot.com has login details (required to download).
free  sound  clip  audio  wav  mp3  download  database 
may 2011 by dandv
Surveillance - Social Network Analysis
One common form of surveillance is to create maps of social networks based on Facebook, MySpace, Twitter as well as from traffic analysis information from phone call records such as those in the NSA call database, and others. These social network "maps" are then data mined to extract useful information: personal interests, friendships & affiliations, wants, beliefs, thoughts, and activities.

Many U.S. government agencies such as DARPA, NSA, and DHS are currently investing heavily in research involving social network analysis

AT&T developed a programming language called "Hancock" which is able to sift through enormous databases of phone call and Internet traffic records, such as the NSA call database and extract "communities of interest" -- groups of people who call each other regularly, or groups that regularly visit certain sites on the Internet.

About 20% of employers have reported using social networking sites to collect personal data on prospective or current employees.
surveillance  participatory  voluntary  data  mining  NSA  DHS  DARPA  cal  database  AT&T  Hancock  FBI  warantless  1984 
march 2011 by dandv
Advantages of using the DBI backend for KiokuDB when persisting Moose objects
See also the previous posts in the thread ("And of course KiokuDB does have it's own set of tools as well, just look in KiokuDB::Cmd (this has load, dump (for the whole DB or just one entry), edit, fcsk and a garbage collector) and there is KiokuDB::Navigator which provides a web based view of your KiokuDB.")
KiokuDB  Perl  database  object  persist  serialize  backend 
february 2011 by dandv
PassMark Software - CPU Benchmark Charts
"200K+ Systems Tested and 1,000+ CPU Models - Updated Daily!

PassMark Software has delved into the thousands of benchmark results that PerformanceTest users have posted to its web site and produced five Intel vs AMD CPU charts to help compare the relative speeds of the different processors. Included in this list are CPUs designed for servers and workstations (Intel Xeon and AMD Opteron processors), desktop CPUs (Intel Core2 Quad, Intel Core i7, Intel Core2 Extreme and AMD Phenom II processors), in addition to mobile CPUs."
CPU  processor  benchmark  list  database  comparison 
november 2010 by dandv
Product Reviews, Tests & Price Comparison - alaTest USA
Huge database of electronics specifications and aggregated reviews, images and videos. Found a lot of ASUS laptop specs that are no longer on their web site. Reviews are aggregated from newegg, Amazon, Bestbuy and grouped into expert and user reviews.

Rudimentary search for laptops by core characteristics. gdgt's is way more powerful.
electronics  gadget  notebook  netbook  laptop  database  search  engine  finder  reviews  aggregator  images  photos  videos 
november 2010 by dandv
Gadget finder - gdgt: find by spes laptops, notebooks, netbooks, cameras, monitors, PCs, home theater equipment etc.
The best and least known laptop/notebook finder/search engine. Can search for matte vs. glossy screen or backlit keyboard. Blows Cnet and LaptopLogic out of the water in feature specification, but lacks newest laptop models because specs are crowdsourced (generally good). Few reviews or links to reviews.
electronics  gadget  notebook  laptop  netbook  find  finder  search  engine  chooser  selector  select  database  compare  comparison 
november 2010 by dandv
Nanotechnology and Nanoscience | Nanowerk
Nanotech portal: degrees, jobs, events, company and labs directory, database of nanoparticles, newsletter on latest environmental, health and safety developments
nanotech  database  portal  degrees  education  jobs  companies  labs  listings  list  business 
october 2010 by dandv
CrunchBase, The Free Tech Company Database
"CrunchBase is the free database of technology companies, people, and investors that anyone can edit."
startup  company  business  people  database  wiki  technology 
august 2010 by dandv
Barack Obama Speeches 2002-2009 - Free, Searchable Database
Software to index texts (e-mails, documents, web pages etc.) and turn them into searchable databases. Nicely applied to Obama speech transcripts. The database is searchable online.

"From over 200 of Obama's official speeches spanning from 2002 all the way to june 2009, he said the words:

Health - in 171 speeches
Jobs 164
Economy 162
Education 152
Energy 133
Security 117
Grandmother 29
Immigration 13 " -- http://www.trackitt.com/usa-discussion-forums/i485-eb/503496499/obama-you-lie
database  index  software  search  metadata  information  organize  analyze  Obama  speeches  searchable  cool  USA  politics 
march 2010 by dandv
NSA call database - Wikipedia, the free encyclopedia
Started ~7 months before 9/11, 1.9 trillion call-detail records for AT&T, SBC, BellSouth (all three now called AT&T), and Verizon. "The records include detailed call information (caller, receiver, date/time of call, length of call, etc) for use in traffic analysis and social network analysis"
NSA  call  database  privacy  monitoring  surveillance  state  awareness 
march 2010 by dandv
DBAzine.com: Trees in SQL: Nested Sets and Materialized Path
<<[Relational databases] turned out to be surprisingly incomplete when modeling transitive dependencies. Almost every couple of months a question about how to model a tree in the database pops up at the comp.database.theory newsgroup. In this article I'll investigate two out of four well known approaches to accomplishing this and show a connection between them. We'll discover a new method that could be considered as a "mix-in" between materialized path and nested sets.>>
SQL  tree  hierarchy  materialized  paths  nested  sets  database  modeling 
july 2009 by dandv
MySQL Gotchas
Can't believe how RETARDED this database software is vs. how many fanbois it has. "Note that MySQL's behaviour [with regards to case sensitivity] is the diametrical opposite of the default behaviour of most other databases."
MySQL  sucks  gotchas  anti  against  database  comparison 
july 2009 by dandv
GSMArena.com - GSM phone reviews, news, opinions, votes, manuals and more...
PDA/Phone database of specifications, user ratings and reviews. Much more comprehensive than phonescoop.com. Has a "Phone finder" to select among the massive array of choices.
phone  PDA  database  specification  specs  search  finder  compare  ratings  rankings  reviews 
may 2009 by dandv
TinyURL - Archiveteam
Future-proof the Internet by preventing linkrot
TinyURL  archive  dead  link  crawl  database  URL  redirect 
april 2009 by dandv
Trading System Rankings at Collective2
Very well-done site tracking the performance of user-submitted automated trading systems. Systems are apparently not back-tested, but tested real-time against market data, then tweaked (disclaimer mentions that systems are built with the advantage of hindsight).
compare  trading  system  comparison  reviews  ratings  performance  database  stock  option  forex  investing  automated  platform  automatic 
april 2009 by dandv
Object Oriented Learning Center : Object Oriented Databases vs Relational Databases
Read the PDF. The HTML pages miss pieces of it (e.g. at the end of "The Wall: Where an RDBMS breaks down")
ODBMS  vs  compare  RDBMS  object  versus  relational  wall  database  comparison 
january 2009 by dandv
wiki.dbpedia.org : About
"DBpedia is a community effort to extract structured information from Wikipedia and to make this information available on the Web. DBpedia allows you to make sophisticated queries against Wikipedia, and to link other data sets on the Web to Wikipedia data."
Wikipedia  database  organize  structure  semantic  search  RDF  data  mining 
november 2008 by dandv
MySQL vs PostgreSQL - WikiVS
PostgreSQL rules, MySQL sucks, even when it comes to performance. So STFU.
PostgreSQL  MySQL  comparison  feature  performance  SQL  database  cool 
may 2008 by dandv
gotAPI - Aggregated software development documentation
Nice integration of documentation for programming languages, web servers, databases systems, HTML, CSS, AJAX frameworks (no ExtJS yet), Flickr API etc.
documentation  reference  API  database  programming  cool  webdev  JavaScript  DOM 
may 2008 by dandv
fabFORCE.net - DBDesigner 4
Last version before MySQL Workbench bought it and crippled it to be MySQL-specific. DBDesigner supports MySQL, Oracle, MSSQL, SQLite, and PostgreSQL via ODBC - see http://dev.bnet.pl/blog/?p=18
database  schema  visual  SQL  design  freeware  PostgreSQL  DBDesigner 
may 2008 by dandv
SchemaSpy - explore SQL database and generate visual schema
Graphical Database Schema Metadata Browser. Supports PostgreSQL, MySQL, Oracle, Sybase etc.
database  explore  schema  SQL  reverse  engineer  draw  visual 
may 2008 by dandv
MySQL :: Managing Hierarchical Data in MySQL
Nested sets are more efficient than adjacency lists at managing hierarchical data stored in flat SQL relational databases.
tree  database  table  SQL  hierarchy  programming  nested  set 
may 2008 by dandv
FDA - Database of Select Committee on GRAS Substances (SCOGS) Reviews
FDA's list of 373 Generally Recognized As Safe substances (mostly food additives), compiled between 1972-1980 (!).

Conclusions are 1-3 (safest to safe), 4 = adverse effects, but can't tell if they're bad; 5 = insufficient data to tell.

More at http://www.fda.gov/Food/IngredientsPackagingLabeling/GRAS/SCOGS/ucm2006852.htm and https://en.wikipedia.org/wiki/Generally_recognized_as_safe
safe  health  food  additive  FDA  list  database  GRAS 
march 2008 by dandv
Transaction Processing Performance Council
Transaction processing and database benchmarks. Clustered vs. non-clustered. Hardware manufacturers: HP, IBM, Bull etc. Software: MS SQL Server, Oracle, IBM DB2. OSes: Redhat, HPUX etc.
database  benchmark  hardware  comparison  performance 
january 2008 by dandv
Twitter developer Alex Payne on the pain of scaling up Ruby on Rails
"All of us working on Twitter are big Ruby fans, but I think it’s worth being frank that this isn’t one of those relativistic language issues. Ruby is slow."
rubyonrails  ruby  scaling  database  performance  twitter  interview  rails 
november 2007 by dandv
Portable freeware collection
Large user-reviewed no-nonsense cool database of freeware portable Windows applications
applications  tools  utilities  Windows  freeware  portable  database  COOL  software  free 
september 2007 by dandv
StateMaster - Statistics
US state statistics, from the useful to the most useless and from state insects to the number of buses crossing the border or the number of adults over 65 who lost all their teeth. Can't organize by other category (e.g. crimes by race) than state
state  USA  statistics  information  database  reference 
july 2007 by dandv
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