jbellis

35 ms·

451.
by jbellis 13y ago
I think you've misread the 580 patch. By definition, you need to read the existing vector clock value before you can issue an update against it. /Member of the presumedly incompetent Cassandra tech leadership
452.
by jbellis 13y ago
The Streaming article is still being written; I got impatient. :) We should have a post up with more details about the native protocol 2.0 this week or next.
453.
by jbellis 13y ago
I wrote a description with some more technical details here: http://www.datastax.com/dev/blog/whats-under-the-hood-in-cas...
454.
What's under the hood in Cassandra 2.0(datastax.com)
3 points by jbellis 13y ago|0 comments
455.
by jbellis 13y ago
Also, https://twitter.com/BoredElonMusk
456.
by jbellis 13y ago
The only people who claim there are plenty of talented developers to hire are people who have never tried to hire one in the last three-plus years. I hire developers anywhere in the world to work on cutting edge infrastructure software and
457.
by jbellis 13y ago
"Using an instrumental variables approach to correct for both measurement error in entry dates and endogeneity of the timing of entry, I ﬁnd that Wal-Mart entry increases retail employment by 100 jobs in the year of entry. Half of this
458.
by jbellis 13y ago
I got this from some older friends when I started DataStax. They took my wife aside: "Sure, Jonathan's 'starting a company.' But seriously, do you need help?"
459.
by jbellis 13y ago
Maybe it has something to do with middle class incomes subsidizing an electric car for the rich.
460.
by jbellis 13y ago
"The paradigm was so disruptive that it was suppressed by computer scientists for decades." It didn't really get better from there.
461.
by jbellis 13y ago
I sympathize with that perspective. I was a huge Thrift fan five years ago. But it became clear early on that, despite your experience and mine, most people had a really hard time wrapping their heads around Cassandra's Thrift API.
462.
Cassandra vs MongoDB For Time Series Data(relistan.com)
100 points by jbellis 13y ago|81 comments
463.
by jbellis 13y ago
Presumably, avoiding electrocution of the passenger being extracted is also a goal.
464.
by jbellis 13y ago
Gregory Casamento, the Kickstarter author, is Chief Maintainer of GNUstep: http://www.gnustep.org/developers/whoiswho.html
465.
by jbellis 13y ago
Dear software engineers, Welcome to being a large enough part of the economy to attract political attention. Love, the energy industry
466.
by jbellis 13y ago
You are correct, for about another week. :)
467.
by jbellis 13y ago
That's a pretty silly objection. With the common three replicas, I have to lose two Cassandra nodes to be unable to achieve quorum. I have to lose just one regionserver to be unable to read from HBase.
468.
by jbellis 13y ago
Here we're discussing the Consistency in CAP, not the one in ACID. Here's a good introduction to the concepts involved: http://www.allthingsdistributed.com/2008/12/eventually_consi...
469.
by jbellis 13y ago
/author of the "con" position here I can see why you might come to those conclusions -- a lot of people with their heads down in Hadoop just don't realize that there's a world outside HDFS. Not saying that in a mea
470.
by jbellis 13y ago
Even lightweight transactions in 2.0 for linearizability: http://www.datastax.com/dev/blog/lightweight-transactions-in...
471.
by jbellis 13y ago
KA doesn't accept community-produced videos. Which makes sense if you think about it; it would take more time to vet them than they're worth, on average. Edit: additionally, if he just sent a video with a quick note, KA may conti
472.
by jbellis 13y ago
Relevant, an interactive map of botched paramilitary police raids: http://www.cato.org/raidmap
473.
by jbellis 13y ago
Partly true. The FSF interprets "X linking Y" as "X modifying Y and therefore subject to Y's license," which is why Microsoft got to make so much hay out of the GPL's "virality."
474.
by jbellis 13y ago
Cassandra is not schema-less. I covered this in my recent article on Cassandra Myths: http://www.infoq.com/articles/cassandra-mythology
475.
by jbellis 13y ago
Shades of Jim Gray. :( [ http://en.wikipedia.org/wiki/Jim_Gray_(computer_scientist)#D... ]
476.
by jbellis 13y ago
WAL only helps so much, since you also need seeks for reads. Cassandra has a WAL + log-structured storage + no read-before-update design, so it basically eliminates seeks on writes entirely, and EBS is still ass for workloads that don't fi
477.
by jbellis 13y ago
Not so: first, writes are always sent to all replicas, so throughput for ONE and QUORUM is identical. The primary difference is that ONE is allowed to complete when more nodes are down. It's true that QUORUM reads will have half (in a 3-re
478.
by jbellis 13y ago
I think it's worth elaborating that the primary advantage to the dynamo model is not in the best- or average- case, but when everything does not go as planned -- when the master gets behind, when ec2 network latency spikes, etc. Then "an
479.
by jbellis 13y ago
This misses the point. There are two main reasons why, when I was researching scalable databases, I primarily gravitated towards Dynamo-style replication (Cassandra, Voldemort, and at the time, Dynomite): - There is no such thing as failove
480.
by jbellis 14y ago
Will this be integrated with the Wayback Machine?

More ›