zhoutong

20 ms·

151.
by zhoutong 14y ago
Yeah. I hope OpenStack can catch up soon. [The first line of the comment was intended to keep this on-topic. I didn't really have any financial interest in Bitcoinica at the time of the hack. A major management handover took place three wee
152.
by zhoutong 14y ago
Database distribution is definitely a pain for RDBMS. A completely re-invented distributed database system like Cassandra is what's needed. But this simply means that a random blogger can't deploy WordPress on this kind of highly available
153.
by zhoutong 14y ago
> The big disadvantage of all of this is you're now spending a few million a month on salaries, infrastructure (various PoPs, network gear, etc.) before you've bought a single server or served a single page. Not so lean. So a business o
154.
by zhoutong 14y ago
Well, disregarding the design decision, or the RFC, it's basically wrong to use CNAME alongside of other records, especially MX records. Considering most active domains have MX records under the root host name (like example.com.), CNAMEs wo
155.
by zhoutong 14y ago
The load balancer itself can always be a single point of failure, no matter how many layers of packaging you have. By default, DNS system doesn't support failover because multiple A records will result in round robin. So there are two possi
156.
by zhoutong 14y ago
AWS officially recommends CNAME records for ELBs, but the IP addresses don't change regularly and also CNAME for root host name won't work if other records are present, so many sysadmins straightaway use A records with the ELB IPs.
157.
by zhoutong 14y ago
It takes time to boot up VMs, basically. System booting is one of the most expensive operations in virtualization, especially when the disk image is somewhere in the network. There will be a lot of random I/O, memory allocation and high CPU
158.
by zhoutong 14y ago
The problem is that a lot of inconsistencies are caused by the software, not I/O or cache. For example, if your database is in a middle of transaction and everything is in the memory, you can't "let the stuff complete" without installing a
159.
by zhoutong 14y ago
On a small scale, petitions will work better than a hash tag on a Google-owned website. The person that made the decision is the judge. So a rational way to protest is to protest the decision itself. On a large scale, make something disrupt
160.
by zhoutong 14y ago
I don't understand why #BoycottSomething should be used for protests. Boycotting an influential company is extremely hard. I'm sure that there are more rational ways to protest, instead of trying to boycott a company that actually delivers
161.
by zhoutong 14y ago
I was talking about the displacement only (which the parent thread discusses). I of course acknowledge the common sense that not all ice is floating on water.
162.
by zhoutong 14y ago
Even if that's so, we are not getting the second "back". This leap second is a second added to UTC, to adjust for the slowed-down earth rotation. There was never a leap second that removes a second from our UTC clock so far (it may happen i
163.
by zhoutong 14y ago
It doesn't work like that. The mass of water displaced is equal to the mass of the floating ice itself. Melting a piece of ice has no change on water level. so yeah, nothing changes.
164.
by zhoutong 14y ago
No it's wrong. > "I also wanted to clarify that Route 53 is an Amazon-built and operated service. It is not a re-branding of a third party DNS service. Over time you'll see various parts of Amazon move over to use Route 53." https://fo
165.
by zhoutong 14y ago
No, it doesn't. Even the name servers of Amazon.com belong to UltraDNS and Dynect, instead of their own Route 53.
166.
by zhoutong 14y ago
I'm not a security expert, but at least I have first hand experience with the Bitcoinica hack. It seems that all the security features you have mentioned are present in many Bitcoin sites, including Bitcoinica,r and they don't prevent the e
167.
by zhoutong 14y ago
> I should also note that aMember had in the meantime released an upgrade to their service which deals with the issue, though an upgrade with our heavily modified system was a significant endeavour. In the previous blog post: > Our
168.
by zhoutong 14y ago
> And yeah, under my system market making actually requires work/risk, not just riskless front running. The free lunch is gone. That is the point. There would be less volume. Buyers and sellers would trade slightly slower trade executio
169.
by zhoutong 14y ago
Not exactly. In a black box, there will be less orders because market participants are discouraged to be market makers, because the point their orders have been triggered is also likely the point the market deviates significantly and they h
170.
by zhoutong 14y ago
This is not efficient. If you use interval bidding, there will frequently be gaps in market prices. Remember that at any instant, the order book (bids and asks) represents only a small portion of market sentiment (real demand and supply). T
171.
Show HN: API for dig +short(digshort.net)
1 points by zhoutong 14y ago|0 comments
172.
by zhoutong 14y ago
Does this violate the copyright of WSJ? I hate the paywalls, but posting the screenshots seems wrong to me.
173.
by zhoutong 14y ago
I'm afraid the details of the iOS 6 features other than what's announced in WWDC are still under NDA (which you signed when you gain access to the developer beta). So perhaps you want to remove that comment.
174.
by zhoutong 14y ago
Yes, and how about iMessage and FaceTime that require email addresses in contacts to work? And also the 3rd party sites that rely on Facebook OAuth API to identify users based on emails (they could use uids, but I'm sure some are still usin
175.
by zhoutong 14y ago
No one can ever fake transactions out of thin air. Bitcoin is cryptography. The requirement for confirmation is due to possible double spending, which will cost far more than a VPN account to do it successfully (to cheat a 0-confirmation
176.
by zhoutong 14y ago
Yes but so what? You can't apply the same software to fiat currencies for international settlement. The attractiveness of Bitcoin is precisely the power of open source software and asymmetric cryptography. Bitcoin has value because it's one
177.
by zhoutong 14y ago
It looks like the customers can only get the cash rewards when they sign up using the referral links. This is actually sort of price discrimination because the people who directly sign up with Chase usually don't apply because of the reward
178.
by zhoutong 14y ago
IMHO, the biggest problem of gTLD is the inequality created on the Internet. Google.com's registry cost is less than $8/year, just like any random .com domain. Everyone has the fair chance to get a domain and start a business online. But wh
179.
by zhoutong 14y ago
My agent told me to write "awaiting ITIN" on the line that requires SSN. I could get it in a few days.
180.
by zhoutong 14y ago
Since there's a ClearType HD and ClearType Full HD, it's safe to assume that the ClearType Full HD is 1920x1080 (16:9 screen). Probably the ClearType HD is only 1366x768?

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