dap

29 ms·

211.
by dap 10y ago
The NYTimes has a great visualization of S&P 500 returns for money invested any year between 1920 and 2009 and withdrawn between 1921 and 2010: http://www.nytimes.com/interactive/2011/01/02/business&#
212.
by dap 10y ago
> I'm unaware of any place in the world requiring a license to sleep and eat breakfast. This was the third Google hit for "are hotels licensed": http://www.myfloridalicense.com/dbpr/hr/Servicestha
213.
by dap 10y ago
Licenses aren't just for ensuring competence (as in the case of driver's licenses). Sometimes, they're to make sure that the government knows about the people doing it (as in the case of car registrations), either to collect
214.
by dap 10y ago
> But for a home storage server, ECC is no more critical than buying a UPS, shielded SATA cables, enterprise-grade drives, a high quality power supply, etc. etc. Together these upgrades will easily double the cost of the storage server.
215.
by dap 10y ago
I think the counter is that the rights of various parties here are not black and white. Restrictions are put in place (in the incinerator case, on a private landowner; in the traffic case, on the public at large) in the common interests of
216.
Dtrace isn't just a tool; it's a philosophy(codearcana.com)
1 points by dap 10y ago|0 comments
217.
by dap 10y ago
Absolutely -- I didn't mean to imply that ZFS even comes close to solving the distributed parts of the problem, but rather that a distributed storage system does have to address the problems of putting bits on disk.
218.
by dap 10y ago
Virtualized, network block devices have all the same problems I described -- even worse, because the abstraction coneys even less about what an application is trying to do.
219.
by dap 10y ago
Actually, persistent storage is fairly hard in itself. Look at what ZFS does to ensure data integrity in the face of phantom writes, dropped writes, bad controllers, and other implicit, non-fatal failures.
220.
by dap 10y ago
> At its core, Torus is a library with an interface that appears as a traditional file, allowing for storage manipulation through well-understood basic file operations. Coordinated and checkpointed through etcd’s consensus process, this
221.
by dap 10y ago
It's pretty ironic that Khosla would find Macbeth less than useful.
222.
by dap 10y ago
> I'd really like to see numbers on how dtrace handles many millions of probes at once (which is what xray is handling). It's not uncommon to have 10 or 100 million functions in some of these programs. I have strong doubts that
223.
by dap 10y ago
> When they traced everything, it was two orders of magnitude slower. > At 100k event/s (quite possible in the situations x-ray is used), the app would be about 60% slower. For just a simple probe, not full on tracing. I think yo
224.
by dap 10y ago
> The cost is acceptable when tracing and barely measurable when not tracing. "Acceptable" is obviously relative, but with DTrace's pid provider, the cost is zero when not tracing, and about the cost of a fastcall per prob
225.
by dap 10y ago
I've been very tempted to apply for PreCheck -- it seems like a great deal -- but I find it deeply problematic that the government would create a security screening mechanism so onerous that people gladly hand over their fingerprints t
226.
by dap 10y ago
Because not only did the engineers who built it consider how the architecture would ensure security, they wrote all of the considerations and design choices down.[1] Even if they were completely wrong about everything, there's no reas
227.
by dap 10y ago
But that doesn't follow at all. Others have pointed out (in this thread) it's possible that old-media outlets have become sloppy _because_ the sloppy new-media outlets are out-producing them and gaining a major share of attention
228.
by dap 10y ago
How would it be different than the filesystem API? There was a great lightning talk a few years ago that I can't seem to find where the author described an API for storing blobs in a hierarchical namespace. Of course, halfway through,
229.
by dap 11y ago
OS size is just one problem with Virtual Machines. (Much of the OS is idle unless explicitly used anyway.) Other significant problems include: - inefficient use of resources resulting from functionality duplicated in both the hypervisor a
230.
by dap 11y ago
I meant a filesystem implementation (i.e., kernel code actually implementing the filesystem system calls from the application, either by reading and writing blocks from a block-device provided by the hypervisor or using a network file proto
231.
by dap 11y ago
Does this kernel run its own TCP stack and filesystem?
232.
by dap 11y ago
I understand the point of view that it's useful to see what "actually" happened. But the other way to think about it is like this: at some point, when a developer in the future wants to understand how #master evolved over ti
233.
by dap 11y ago
Once you've identified long response times, it would also be possible to observe that the threads handling requests spent a good percentage of time waiting for CPU, which would point to CPU saturation as the problem. I'm not sure
234.
by dap 11y ago
> Where is the reflection on the kik Dispute Resolution process? They already had a substantial blog post reflecting on that part of the incident, including what they feel worked and didn't: http://blog.npmjs.org/pos
235.
by dap 11y ago
Here's a round-up: http://www.nytimes.com/2015/05/12/upshot/more-consensus-on-c...
236.
by dap 11y ago
This is a great example. It doesn't take a lot of dimensions, though. I've seen many system workloads where the average latency was not the latency of any of the requests.
237.
by dap 11y ago
> Let me put it this way. In the last say five years, I can't think of a single article I've come across where someone describes DTrace making their life better (except one I wrote in 2011: http://blog.reverberate.or
238.
by dap 11y ago
> I think the industry can support multiple competing unikernels in different languages. That way we can reimplement existing, common facilities not once, but N times -- and still not support what I was alluding to (namely, allowing spec
239.
by dap 11y ago
We (the computing industry) did the single-address thing for many years. It was terrible. Virtual memory was a major development in the robustness of computer systems because it allowed unrelated components to be isolated into separate fa
240.
by dap 11y ago
No. Despite what other replies to your post have said, several companies (and many individuals) have contributed large pieces to ZFS, and they still hold copyright.

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