postgresql has short term transactional record locks as well as long term advisory locks. It has the ability to do paradox style locking if you are so inclined...
that's not fair at all..comparing the low end corolla with the volt...the volt's got better torque and much sportier times. to be fair, you need to start with the corolla xrs, which is 20k base price. the point still holds, but its even closer now.
That's a very fair point. I'll say this though: most libertarian economists warn about the dangers of governments using policy to direct economic matters. This criticism is very well founded; generally things start out well, but inevitably things go wrong and the perpetrators end up blaming the free market for all the problems. There are of course examples and counter examples on both sides, so things are completely black/white, but as a general trend it rings true. While libertarian economists (to use a stereotype) are political in the sense that they look at the economic problems resulting from political issues, they tend to think that economic policy should be apolitical...that is, get politicians of all striped out of the money business. Krugman is the nemesis of that line of thinking.
The problem with Krugman is that he is relentlessly political and that is a bad trait for an economist. He tireless argues for greater and greater interventions in the marketplace (that is, he's a statist) without taking into account the secondary effects of those interventions because that would contradict his world view. He's also very popular in Washington:-).
Interesting...I wonder what accounts for the difference in the numbers...aging, or just being conservative? Or maybe the 10k figure is not accurate...using it, an 80gb drive should be in theory able to write 800tb, not 35. Probably, all of the above.
It should be longer than that actually -- using the 10k write lifepsan and a 80gb drive, your life span would be:
(10k * (80gb/20gb)) * Q
where Q is the efficiency of wear leveling and defending against write amplification (as Intel calls it).
using Q of 0.5, we get 20000 days, or 54.8 years.
I think it will be less than that though...10k writes makes a lot of assumptions, and I think is only guaranteed for a particular period of time....the flash cells 'age', and the age interacts with write lifespan.
This is a bigger deal at the datacenter -- many datacenters are power limited and are trying very hard to get people to reduce power consumption. 15k drives draw 10-15 watts usually, and if you have to by 200 of them to get the 50k iops your database needs, we are talking serious power now.
The x-25e is great, and I use it in a few situations, but at 8x the cost per GB of 15k FC I'm not moving to it wholesale. It's true that for $10K I could get as many IOPS as my $200K EVA, but it would only have the storage of a single drive in the array.
...for 5% of the price, and trivially built without proprietary protocols, hardware, or software support. Let's compare apples to apples, and spend 200k on some sas sata enclosures. good raid cards, and intel x25-e, and see who is kicking whose ass. many, many databases are iops bound, not storage bound (or they would be stuffed with dense sata drives). Now, I can't blame you for not doing that _today_, but it should be patently clear that flash is the future of enterprise databases (as a bonus, you get a huge reduction in power consumption!).
While hard drives will continue to live on for a good while yet where $/GB considerations are paramount (especially archival type applications), the performance advantages of flash drives will soon trump the decreasing cost advantage both for workstation (x25-m) and server (x25-e) environments. The case for flash in servers is even more compelling, where we measure drives in terms of IOPS and a single Intel flash drive performs 10 or 20 times better than the best hard drives on the market for a fraction of the power consumption. Understandably, many IT managers are cautious about adopting new technologies, especially when the failure characteristics are not completely known, but I suspect the advantages are so great that minds are going to start changing, quickly.
lame...a much better way of handling this is what datacenters are already doing: simply sell you power circuits, say 20 amps each for a set price. if they want to discourage power use, they simply have to raise the price. low tech, and works perfectly well. you can always get a good power strip with a ammeter on it if you want to know what your servers are drawing.
That's not quite fair. mysql doesn't really have them either. mysql cross database joins are simply working around there lack of support for schemas. Schemas are better in virtually every way...
if you need x database joins in postgres, you can always use dblink of course.
I wish them the best, but their project is doomed. The EV market is clearly going towards batteries, the comments in the article about the scarcity of lithium (11th most numerous element in the ocean) are laughable. In current battery costs, only a small percentage goes towards the lithium raw material purchase. At least EVs more or less piggyback off the current electric grid, which obviously couldn't handle transportation demands, but its a start. The problems with fuel cells are numerous. Where do you buy your fuel cells? How do you get your hydrogen from point A to point B? The problem with these guys is that their project was initiated when fuel cells were 'hot' to those without common sense (government) before they went on to the next brainless strategy...ethanol (oops). Not only that, commercially recoverable hydrogen comes from natural gas...
no. There are tons of lithium everywhere (lithium is the 11th most common element in the ocean) in recoverable amounts (including the u.s.). As the price goes up, more and more supplies come on line. Not only that, lithium is not the primary cost of li-x batteries.
From the article: "(Random access was a jaw-dropping 7ms.)" 7ms random access time is not "jaw dropping"...in computer terms it's an aeon. This fascination with sequential read and write speeds has got to stop. A ssd with 40 mb/sec read and write but 0.1ms random access time will fell faster than a 200mb/sec hard drive for a large number of applications.
In the enterprise world, random access time is even more important. Performance critical databases run on giant storgage systems with dozens of disks not for storage reasons, but because of limitations of the spinning platter. SSDs stand poised to revolutionize computing by drastically raising the slowest (and most important) component in the computer a couple of orders in magnitude of performance.
Unless you type like The Flash, even MLC SSDs from the better vendors (Intel) should be fine for anything outside of server applications. Simple math should back this up (how many GB total the drive can write over its lifetime vs how much you produce each day).
merlin
My personal feeling is that one of her kids probably installed kazaa and maybe downloaded a few songs or traded some with friends...pretty harmless, and most of us have done worse. It's pretty clear that this woman had some pretty serious issues about how that turned around into trouble for her and had the grapefruits to fight the system.
The judge/jury verdict in this case is just one more example of how the decline of our social and political fabric is affecting ordinary americans. We are losing our country, and it's time to start taking it back.
The solar constant is about 1300 watts per square meter (in space). On earth the best you can hope for is about 1000 watts peak. So on average we will look at about say 50% of 50% and less on a cold winter day when we need both heating and more lighting. In fact on a winer day at about 51 degrees latitude we get about 8 hours of light and even then its less than 250 watts per square meter.
umm, ever hear of tilting? your calculations are assuming horizontal tilting and are completely invalid. Cloud cover is actually more important than latitude.
the days of the spinning platter hard drive are almost over. while it will take a long time for the SSD to completely displace all uses of traditional hard drives (especially in industrial storage -- where hard drives are now displacing tape), be prepared for an avelanche of new products in the 1-2 year time frame.
Google's founders heavily invested in a company called Nanosolar, which uses a known process called CIGS for making solar cells. Such cells do not rely as much on expensive, supply constrained polysilicon and can be mass produced for a fraction of the cost of current methods. If current solar power costs 5$/watt, it is not unreasonable to see.5$/watt when ecomomies of scale ramp up. This will displace traditional power generation in many places. go to the website and watch the video, its pretty amazing.
Slashdot Mirror
postgresql has short term transactional record locks as well as long term advisory locks. It has the ability to do paradox style locking if you are so inclined...
so...it's legal and acceptable to have copies, you just can't make them...
that's not fair at all..comparing the low end corolla with the volt...the volt's got better torque and much sportier times. to be fair, you need to start with the corolla xrs, which is 20k base price. the point still holds, but its even closer now.
That's a very fair point. I'll say this though: most libertarian economists warn about the dangers of governments using policy to direct economic matters. This criticism is very well founded; generally things start out well, but inevitably things go wrong and the perpetrators end up blaming the free market for all the problems. There are of course examples and counter examples on both sides, so things are completely black/white, but as a general trend it rings true. While libertarian economists (to use a stereotype) are political in the sense that they look at the economic problems resulting from political issues, they tend to think that economic policy should be apolitical...that is, get politicians of all striped out of the money business. Krugman is the nemesis of that line of thinking.
The problem with Krugman is that he is relentlessly political and that is a bad trait for an economist. He tireless argues for greater and greater interventions in the marketplace (that is, he's a statist) without taking into account the secondary effects of those interventions because that would contradict his world view. He's also very popular in Washington :-).
Interesting...I wonder what accounts for the difference in the numbers...aging, or just being conservative? Or maybe the 10k figure is not accurate...using it, an 80gb drive should be in theory able to write 800tb, not 35. Probably, all of the above.
It should be longer than that actually -- using the 10k write lifepsan and a 80gb drive, your life span would be:
(10k * (80gb/20gb)) * Q
where Q is the efficiency of wear leveling and defending against write amplification (as Intel calls it).
using Q of 0.5, we get 20000 days, or 54.8 years.
I think it will be less than that though...10k writes makes a lot of assumptions, and I think is only guaranteed for a particular period of time....the flash cells 'age', and the age interacts with write lifespan.
This is a bigger deal at the datacenter -- many datacenters are power limited and are trying very hard to get people to reduce power consumption. 15k drives draw 10-15 watts usually, and if you have to by 200 of them to get the 50k iops your database needs, we are talking serious power now.
While hard drives will continue to live on for a good while yet where $/GB considerations are paramount (especially archival type applications), the performance advantages of flash drives will soon trump the decreasing cost advantage both for workstation (x25-m) and server (x25-e) environments. The case for flash in servers is even more compelling, where we measure drives in terms of IOPS and a single Intel flash drive performs 10 or 20 times better than the best hard drives on the market for a fraction of the power consumption. Understandably, many IT managers are cautious about adopting new technologies, especially when the failure characteristics are not completely known, but I suspect the advantages are so great that minds are going to start changing, quickly.
lame...a much better way of handling this is what datacenters are already doing: simply sell you power circuits, say 20 amps each for a set price. if they want to discourage power use, they simply have to raise the price. low tech, and works perfectly well. you can always get a good power strip with a ammeter on it if you want to know what your servers are drawing.
That's not quite fair. mysql doesn't really have them either. mysql cross database joins are simply working around there lack of support for schemas. Schemas are better in virtually every way...
if you need x database joins in postgres, you can always use dblink of course.
I wish them the best, but their project is doomed. The EV market is clearly going towards batteries, the comments in the article about the scarcity of lithium (11th most numerous element in the ocean) are laughable. In current battery costs, only a small percentage goes towards the lithium raw material purchase. At least EVs more or less piggyback off the current electric grid, which obviously couldn't handle transportation demands, but its a start.
The problems with fuel cells are numerous. Where do you buy your fuel cells? How do you get your hydrogen from point A to point B? The problem with these guys is that their project was initiated when fuel cells were 'hot' to those without common sense (government) before they went on to the next brainless strategy...ethanol (oops).
Not only that, commercially recoverable hydrogen comes from natural gas...
no. There are tons of lithium everywhere (lithium is the 11th most common element in the ocean) in recoverable amounts (including the u.s.). As the price goes up, more and more supplies come on line. Not only that, lithium is not the primary cost of li-x batteries.
read: http://gas2.org/2008/10/13/lithium-counterpoint-no-shortage-for-electric-cars/
From the article: "(Random access was a jaw-dropping 7ms.)" 7ms random access time is not "jaw dropping"...in computer terms it's an aeon. This fascination with sequential read and write speeds has got to stop. A ssd with 40 mb/sec read and write but 0.1ms random access time will fell faster than a 200mb/sec hard drive for a large number of applications. In the enterprise world, random access time is even more important. Performance critical databases run on giant storgage systems with dozens of disks not for storage reasons, but because of limitations of the spinning platter. SSDs stand poised to revolutionize computing by drastically raising the slowest (and most important) component in the computer a couple of orders in magnitude of performance.
As a long time florida resident, wont it be alronic when a (ha ha ha) hurricane rolls through...
Unless you type like The Flash, even MLC SSDs from the better vendors (Intel) should be fine for anything outside of server applications. Simple math should back this up (how many GB total the drive can write over its lifetime vs how much you produce each day). merlin
I would pick Ron Paul as my vice president, and resign.
My personal feeling is that one of her kids probably installed kazaa and maybe downloaded a few songs or traded some with friends...pretty harmless, and most of us have done worse. It's pretty clear that this woman had some pretty serious issues about how that turned around into trouble for her and had the grapefruits to fight the system.
The judge/jury verdict in this case is just one more example of how the decline of our social and political fabric is affecting ordinary americans. We are losing our country, and it's time to start taking it back.
merlin
umm, ever hear of tilting? your calculations are assuming horizontal tilting and are completely invalid. Cloud cover is actually more important than latitude.
http://rredc.nrel.gov/solar/old_data/nsrdb/redbook/atlas/
merlin
the days of the spinning platter hard drive are almost over. while it will take a long time for the SSD to completely displace all uses of traditional hard drives (especially in industrial storage -- where hard drives are now displacing tape), be prepared for an avelanche of new products in the 1-2 year time frame.
merlin
give up programming and get a MBA? more work for me :-)
every time a new processor comes out, there is a debate over the usefullness. The the video editing guy comes out and puts the debate to rest. :-)
Google's founders heavily invested in a company called Nanosolar, which uses a known process called CIGS for making solar cells. Such cells do not rely as much on expensive, supply constrained polysilicon and can be mass produced for a fraction of the cost of current methods. If current solar power costs 5$/watt, it is not unreasonable to see .5$/watt when ecomomies of scale ramp up. This will displace traditional power generation in many places. go to the website and watch the video, its pretty amazing.
will it run at 10 Ghz?
tada!