Scalability

Facebook Twitter
According to database pioneer Michael Stonebraker, Facebook is operating a huge, complex MySQL implementation equivalent to “a fate worse than death,” and the only way out is “bite the bullet and rewrite everything.” Not that it’s necessarily Facebook’s fault, though. Stonebraker says the social network’s predicament is all too common among web startups that start small and grow to epic proportions. During an interview this week, Stonebraker explained to me that Facebook has split its MySQL database into 4,000 shards in order to handle the site’s massive data volume, and is running 9,000 instances of memcached in order to keep up with the number of transactions the database must serve. Facebook trapped in MySQL ‘fate worse than death’ — Cloud Computing News Facebook trapped in MySQL ‘fate worse than death’ — Cloud Computing News
MongoDB is Web Scale
Why are Facebook, Digg, an Why are Facebook, Digg, an Real-time social graphs (connectivity between people, places, and things). That's why scaling Facebook is hard says Jeff Rothschild, Vice President of Technology at Facebook. Social networking sites like Facebook, Digg, and Twitter are simply harder than traditional websites to scale. Why is that? Why would social networking sites be any more difficult to scale than traditional web sites? Let's find out.
Bytepawn - Scalable Web Architectures and Application State Bytepawn - Scalable Web Architectures and Application State In this article we follow a hypothetical programmer, Damian, on his quest to make his web application scalable. Now fast forward to 2009. Damian's site has evolved to a web game for playing dungeons online, in your browser. Damian is still using LAMP. Data about types of games (including parameters such as monster strength), user data (including status information), and data about active games (including players, the monters's health) are still stored in Mysql.
Against all the odds | High Scalability Against all the odds | High Scalability First let's describe what means by odds: In my social network, I found 93% of the mainstream developers sanctify the database, or at least consider it in any data persistence challenge as the ultimate, superhero, and undefeatable solution. I think this problem come from the education, personally, and some companies also I think it's involved in this. To start to fix this bad thinking, we all should agree in the following points: Every challenge have its own solutions, so whatever you want to save/persistent, there are always many solutions.
Are Cloud Based Memory Architectures the Next Big Thing? | High
» Scalable Web Applications Programming the new world: Programmi » Scalable Web Applications Programming the new world: Programmi Purpose of the entry On Saturday June 13th 2009 I attended a talk by Eli White on Scalable web applications. Eli White previously worked at digg.com and now holds the position PHP Community Manager & DevZone Editor-in-Chief at Zend Technologies.
Over the past few weeks, I’ve been taking whatever spare moments I can find to think about what technologies we’re going to use to build the initial release of BankSimple. Many people would probably assume that I’d immediately reach for Scala, what with having co-authored a book on the language, but that’s not how I approach engineering problems. Each and every problem has an appropriate set of applicable technologies, and it’s up to the engineer to justify their use. (Incidentally, Scala may well be a good fit for BankSimple, in no small part due to a bunch of third-party Java code that we need to integrate with, but that’s a whole different blog post, probably for a whole different blog.) One of the most talked-about technologies amongst the Hacker News crowd is Node, a framework for writing and running event-driven JavaScript code on the V8 virtual machine. As part of evaluating what tech to work with, I considered Node. Node and Scaling in the Small vs Scaling in the Large Node and Scaling in the Small vs Scaling in the Large
How to Succeed at Capacity Planning Without Really Trying : An I Update 2: Velocity 09: John Allspaw, 10+ Deploys Per Day: Dev and Ops Cooperation at Flickr. Insightful talk. Some highlights: Change is good if you can build tools and culture to lower the risk of change. How to Succeed at Capacity Planning Without Really Trying : An I
examples

Digg: 4000% Performance In
Update 4: Why you don’t want to shard. by Morgon on the MySQL Performance Blog. Optimize everything else first, and then if performance still isn’t good enough, it’s time to take a very bitter medicine. Update 3: Building Scalable Databases: Pros and Cons of Various Database Sharding Schemes by Dare Obasanjo. Excellent discussion of why and when you would choose a sharding architecture, how to shard, and problems with sharding.Update 2: Mr. Moore gets to punt on sharding by Alan Rimm-Kaufman of 37signals. Insightful article on design tradeoffs and the evils of premature optimization. An Unorthodox Approach to Database Design : The Coming of the Sh An Unorthodox Approach to Database Design : The Coming of the Sh
This is a guest post by Steffen Konerow, author of the High Performance Blog. Learning how to scale isn’t easy without any prior experience. Nowadays you have plenty of websites like highscalability.com to get some inspiration, but unfortunately there is no solution that fits all websites and needs. 6 Ways to Kill Your Servers - Learning How to Scale the Hard Way 6 Ways to Kill Your Servers - Learning How to Scale the Hard Way
Eric Lai published a provoking article on Computerworld magazine titled “No to SQL? Anti-database movement gains steam” where he pointed to many references in which different Internet-based companies chose an alternative approach to the traditional SQL database. The write-up was driven from the the inaugural get-together of the burgeoning NoSQL community who seem to represent a growing Anti-SQL database movement. Quoting Jon Travis from this article: Relational databases give you too much. No to SQL? Anti-database movement gains stea No to SQL? Anti-database movement gains stea
High Performance Scalable Data Stores
Advice from Google on large distributed syste Google Fellow Jeff Dean gave a keynote talk at LADIS 2009 on "Designs, Lessons and Advice from Building Large Distributed Systems". Slides (PDF) are available. Some of this talk is similar to Jeff's past talks but with updated numbers. Let me highlight a few things that stood out: A standard Google server appears to have about 16G RAM and 2T of disk.
Scaling Online Social Networks without Pains
perl.org, ~10 years of mod_perl app development, mysql and scalability consulting YellowBot (just don’t be too stupid with the “we’ll fix it later” stuff) Download this Document for Free Print Mobile Collections Report Document Real World Web: Performance & Scalability
Put that database in memory An upcoming paper, "The Case for RAMClouds: Scalable High-Performance Storage Entirely in DRAM" (PDF), makes some interesting new arguments for shifting most databases to serving entirely out of memory rather than off disk. The paper looks at Facebook as an example and points out that, due to aggressive use of memcached and caches in mysql, the memory they use already is about "75% of the total size of the data (excluding images)." They go on to argue that a system designed around in-memory storage with disk just used for archival purposes would be much simpler, more efficient, and faster. They also look at examples of smaller databases and note that, with servers getting to 64G of RAM and higher and most databases just a couple terabytes, it doesn't take that many servers to get everything in memory.
You don't even have to make a bid, Randy Shoup, an eBay Distinguished Architect, gives this presentation on how eBay scales, for free. Randy has done a fabulous job in this presentation and in other talks listed at the end of this post getting at the heart of the principles behind scalability. It's more about ideas of how things work and fit together than a focusing on a particular technology stack. Impressive Stats In case you weren't sure, eBay is big, with lots of: users, data, features, and change... 10 eBay Secrets for Planet
Cassandra @ Twitter: An Interview with Ryan King « MyNoSQL There have been confirmed rumors about Twitter planning to use Cassandra for a long time. But except the mentioned post, I couldn’t find any other references. Twitter is fun by itself and we all know that NoSQL projects love Twitter. So, imagine how excited I was when after posting about Cassandra 0.5.0 release, I received a short email from Ryan King, the lead of Cassandra efforts at Twitter simply saying that he would be glad to talk about these efforts. So without further ado, here is the conversation I had with Ryan King (@rk) about Cassandra usage at Twitter: MyNoSQL: Can you please start by stating the problem that lead you to look into NoSQL?
Howfuckedismydatabase.com
Troubles with Sharding - What can we learn from the Foursquare Incident?