grogers

32 ms·

271.
by grogers 10y ago
The speed of sound is invariant to changes in pressure, it is temperature that matters.
272.
by grogers 10y ago
Seems fishy to me as well. Best I could find with a few minutes of googling was a 0.22% 30 day CD, but with a minimum of $95,000 [1]. Others I could find with low deposit limits are in the 0.10% area. Most banks don't even offer 30 day
273.
by grogers 10y ago
Earth being 'in the way' causing fewer meteor strikes doesnt account for the differences between the near and far sides of the moon [1]. It's a fairly small effect apparently. Of course, any moon base would probably be on the
274.
by grogers 10y ago
Without a long-lived leader, the performance would be so bad that I doubt there is a single production implementation that doesn't use that optimization.
275.
by grogers 10y ago
Yeah, PCEL and PAEC are the weird cases. If you are going to operate inconsistently when there isn't a partition, why would you strengthen your guarantee when there is a partition? It seems like there might theoretically be some useful
276.
by grogers 10y ago
They can measure height differences of less than a meter, so I would guess they could measure the contribution of the moon. But this particular link currently seems to measure time differences between two fairly nearby clocks, so the moon p
277.
by grogers 10y ago
Support for online schema changes has been getting a lot better in recent releases of MySQL. No idea if it is totally bulletproof right now though, we are still in the "stone ages" of doing failover based schema changes, not even
278.
by grogers 10y ago
Based on the explanation, cuckoo filters need to reject inserts that would break the invariants, which the demo doesn't seem to do. You are right that deletion from a probabilistic filter is sort of weird, because it is possible to del
279.
by grogers 10y ago
I'm not so sure. The definition of strict serializable/linearizable given in this post is weaker than what most people use. Most people require that linearizable execution must happen as-if it matches a global clock. Simply requir
280.
by grogers 10y ago
Impressive that it works correctly across schema changes. I assume the indexes are laid out like (col, timestamp)? Can you handle an access pattern where keys are continuously inserted with the same value, and then deleted shortly after? Wi
281.
by grogers 10y ago
This is not a great analogy since their first application is block storage, but think about a journaling file system. Typically file data is not journaled, but metadata is. By having a consistent view of the metadata, the entire filesystem
282.
by grogers 10y ago
You might prefer 'ledger' to emphasize the immutability of the journal.
283.
by grogers 10y ago
Naively it looks like your conflict resolution is prone to livelock, where concurrent transactions for a key keep aborting each other without getting any work done. The same can happen if you run a single node RDBMS in serializable isolatio
284.
by grogers 10y ago
1. Most likely the UBI would only go to legal permanent residents. 2. It's at least no worse than today for those people. Support groups will still exist. If you distribute money frequently (e.g. weekly) it might help a little in preve
285.
by grogers 11y ago
How important for redundancy/quality of service is the feature of advertising each region's IP blocks from multiple points in Google's network? It seems like region isolation is the most important quality that Google's n
286.
by grogers 11y ago
Think of the canary as the last line of defense, not the first. You always aspire to deploy zero bugs into production, through good testing and other QA. But if a problem happens, you want to limit the impact as much as possible. Affecting
287.
by grogers 11y ago
My power steering went out once. The car was drivable, but just barely. Likewise if you've ever pumped the brakes while the engine is off, you know that braking power drops to almost nothing. If that happened suddenly on the road &#x27
288.
by grogers 11y ago
Interesting, thanks for the info. Do reads execute through raft? If not, how do you guarantee that behavior - relying on leader leases? If so, does the lease period guarantee disjointness in the timestamps a leader can process, or do you re
289.
by grogers 11y ago
One common reason is that binding to small ports requires root. If you are using a nonstandard port you would typically front that with a load balancer on the standard port. But if you are trying to debug the server itself, you might need t
290.
by grogers 11y ago
When executing a transaction with a given timestamp on some node, doesn't the node have to guarantee that it will no longer accept commits with a smaller timestamp? Without that commitment, you could read a piece of data that is later
291.
by grogers 11y ago
Sonofusion was also fraudulent: http://www.nature.com/news/2009/091123/full/news.2009.1103.h...
292.
by grogers 11y ago
FWIW the best theory we have now is that since the earth was very hot for a while after the moon formed, the radiating heat kept the near side of the moon molten for longer. That means thinner crust on the near side which makes it more like
293.
by grogers 11y ago
CA means you are giving up both consistency and availability if a partition happens (otherwise you'd be CP or AP). How is that at all useful in a distributed system?
294.
by grogers 11y ago
I'll be interested to see the further details discussed in the isolation post, which might answer some questions. This is basically the same how the DynamoDB client transaction library works. The two major problems with that library ar
295.
by grogers 11y ago
Most filesystems default to saving only metadata in the journal. Writing all file data through the journal is much more expensive (unless you are log-structured).
296.
by grogers 11y ago
Human mistakes probably led to the lightning strike not being grounded properly or the earthquake causing structural damage.
297.
by grogers 11y ago
I heard a talk by a group that is doing exactly this. They built their own language to model crypto primitives, and machine check that a java or c implementation satisfies the specification. It is neat stuff, but unfortunately their system
298.
by grogers 11y ago
Here is a link to the same content in a typeface that has more reasonable kerning and is easier to read. http://www.berkshirehathaway.com/letters/growing.pdf
299.
by grogers 11y ago
For another perspective, 10^24 voyagers is about 100 times the mass of earth. That isn't even including the propellant and rockets needed to launch them all.
300.
by grogers 11y ago
Font size can definitely be annoying, although it hasn't bitten me very often - usually you can pinch to get a decent enough size. Far more frequently for me is the header bar that stays pinned to the top or bottom of the page while sc

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