That was true over 3Gbit/s SATA perhaps, but hasn't been true for a while now.
A single PCIe SSD in a 2.5" form factor can move sequential data at 2.5GB/s or better (Gen3 x4). Modern rotating drives cap out somewhere around 200MB/s if I remember correctly, even on 6Gbit/s SATA or SAS links. That means that for sequential IO, you need 12 rotating drives to match the performance of one SSD. For random reads (700K/s on the latest samsung) you need 5800 rotating drives (assuming 120 IOPS from the rotating disk). Note that would require a queue depth of almost 700,000 which is impossible from an application standpoint. In reality, your pool of 5800 rotating drives will be MUCH slower.
At the largest of the large sizes, hard drives will likely stay behind rotation for another decade when only considering cost.
However, if you don't need terabytes of fast storage, we've already crossed the threshold where SSDs are cheaper.
Smallest hard drives you can buy these days are $60 new and store 500GB. That same $60 gets you a 128GB SSD from a "Tier 1" manufacturer (Samsung, Intel, Micron/Crucial, Sandisk, Toshiba)
For just about any storage application that fits in ~100GB or less, SSDs are both cheaper and more reliable TODAY than rotating drives.
That 100GB crossover threshold with the cheapest rotating drives will double every year or so, since today's rotating drive prices are almost completely based on the cost of the electronics and a single head/single platter mechanical system. You can't make a rotation drive significantly cheaper than today, but with each generation of SSD they can halve the number of NAND packages, shrink the PCBA, build controllers with fewer channels, etc.
If they're following industry standards, the typical guarantee on client drives is that your data will be available for 1 year of 60C bake assuming you've already cycled it to the endurance limit.
If your temperature is cooler or you haven't used up all your cycles yet, then retention will be longer than the guarantee.
Enterprise drives trade retention for endurance, thus allowing them to support more write cycles within their warranty periods. The trade-off is that the endurance limit at 60C becomes 3 months instead of 12 months, which for typical enterprise applications is more than enough. Note that when powered up but idle, the drive is performing management of the NAND, so the retention numbers are all assuming that the drive is powered off and in storage.
Intel's X25-M was introduced in late 2008 at $1000 for 80GB ($12.50/GB), and was hard to get demand was so high.
You can currently buy enterprise-grade SSDs from multiple vendors for about $0.65/GB, with failure rates that are a fraction of 1%, and they're ten times faster (random IO) than the X25-M was.
Anyone who cares about their own safety doesn't carry a firearm without a chambered round. If you think that in a real incident you'll have time to draw and rack the slide to chamber a round, you're mistaken.
I'm guessing it was ineffective because most people don't realize how much sugar has been added to the foods they buy, and even relatively small amounts of added sugar break the premise of "slow carb" diets.
In fairness, the author didn't specify the "class" of drive. He simply said 100 GBP or less, and storage didn't matter to him because his application needed less than 10GB per month of data collection.
My guess is you take a bunch of timelapse frames of the same sky.
Then you overlay them at offsets in different directions which would keep any moving objects in the same place.
Picture doing 36000 sequences of overlays: 360 degree variation in 0.1 degree increments at 10 different radial velocities
Most of those sequences will just show blurred gray washout, but if you happened to hit the right direction as a moving object at the right speed, your overlaid image sequence will effectively keep the moving object in the same spot of the frame, which will result in the average brightness for that pixel or pixles to be higher than the surrounding blurs.
The presence of guns generally signals belligerence, except in very narrowly defined circumstances - e.g. at a shooting range, in a police station or military training facility.
As a general rule - if you are in a country with generally free emigration laws and people make a habit of carrying guns, then something is terribly amiss and you need to get out of there. Two possibilities:
1. The people carrying guns have drastically overestimated the danger, in which case, you need to move away - people with bad judgement and no ability to accurately assess personal risk pose a danger to those around them.
2. The people have accurately assessed the danger and so you are in danger as well, from whatever threat they are facing. You have no good basis for staying in such a place, unless you are a war correspondent or in the military. The sensible thing to do is to leave.
Your first assertion is false. People who conceal carry do not do so because of the risk (probability of an event). They recognize the risk is incredibly small. It's the consequences of that risk (their death or the death of a member of their family) which is why they carry a gun, because that gun may save their life if used properly. The odds are tiny, but non zero.
Every concealed carry class teaches you that avoiding a confrontation is your #1 priority, and that your firearm is only for when faced with the threat of imminent bodily harm.
Yup. "I have been asked by a medium-sized business to help them come to grips with why their IT group is ineffective, loathed by all other departments, and runs at roughly twice the budget of what the CFO has deemed appropriate for the company's size and industry."
If the manager is routinely at 2x the budget and that's acceptable, the entire company is out of control. Any of the above reasons should be sufficient on their own for management to replace them, if they're actually beliefs held by executive management.
Slashdot Mirror
Dual-E5 Xeon systems will get you 80 lanes of Gen3 PCIe.
NVMe was invented to work around controller bandwidth and latency issues that you mention, thus getting you full "link" speed into your database
That was true over 3Gbit/s SATA perhaps, but hasn't been true for a while now.
A single PCIe SSD in a 2.5" form factor can move sequential data at 2.5GB/s or better (Gen3 x4). Modern rotating drives cap out somewhere around 200MB/s if I remember correctly, even on 6Gbit/s SATA or SAS links. That means that for sequential IO, you need 12 rotating drives to match the performance of one SSD. For random reads (700K/s on the latest samsung) you need 5800 rotating drives (assuming 120 IOPS from the rotating disk). Note that would require a queue depth of almost 700,000 which is impossible from an application standpoint. In reality, your pool of 5800 rotating drives will be MUCH slower.
At the largest of the large sizes, hard drives will likely stay behind rotation for another decade when only considering cost.
However, if you don't need terabytes of fast storage, we've already crossed the threshold where SSDs are cheaper.
Smallest hard drives you can buy these days are $60 new and store 500GB. That same $60 gets you a 128GB SSD from a "Tier 1" manufacturer (Samsung, Intel, Micron/Crucial, Sandisk, Toshiba)
For just about any storage application that fits in ~100GB or less, SSDs are both cheaper and more reliable TODAY than rotating drives.
That 100GB crossover threshold with the cheapest rotating drives will double every year or so, since today's rotating drive prices are almost completely based on the cost of the electronics and a single head/single platter mechanical system. You can't make a rotation drive significantly cheaper than today, but with each generation of SSD they can halve the number of NAND packages, shrink the PCBA, build controllers with fewer channels, etc.
If they're following industry standards, the typical guarantee on client drives is that your data will be available for 1 year of 60C bake assuming you've already cycled it to the endurance limit.
If your temperature is cooler or you haven't used up all your cycles yet, then retention will be longer than the guarantee.
Enterprise drives trade retention for endurance, thus allowing them to support more write cycles within their warranty periods. The trade-off is that the endurance limit at 60C becomes 3 months instead of 12 months, which for typical enterprise applications is more than enough. Note that when powered up but idle, the drive is performing management of the NAND, so the retention numbers are all assuming that the drive is powered off and in storage.
I'd mod you up if I had points.
Intel's X25-M was introduced in late 2008 at $1000 for 80GB ($12.50/GB), and was hard to get demand was so high.
You can currently buy enterprise-grade SSDs from multiple vendors for about $0.65/GB, with failure rates that are a fraction of 1%, and they're ten times faster (random IO) than the X25-M was.
The Numonyx venture was specifically for NOR flash manufacturing.
IMFT (Intel Micron Flash Technologies) is the NAND partnership between Intel and Micron.
3rd party barrel/chamber? Hard to blame glock for that one.
I have another problem with it.
Anyone who cares about their own safety doesn't carry a firearm without a chambered round. If you think that in a real incident you'll have time to draw and rack the slide to chamber a round, you're mistaken.
Yea. The obesity epidemic in the US correlates strongly to the publication of our food pyramid recommendations by the USDA.
Prior to that, obesity affected a very small number of people in the US.
I'm guessing it was ineffective because most people don't realize how much sugar has been added to the foods they buy, and even relatively small amounts of added sugar break the premise of "slow carb" diets.
That doesn't matter. The power supply surrounding the socket/pads will account for whatever Vcc needs to be.
In the US it's legal to age discriminate against anyone under 40.
Hard for any SATA drive to distinguish itself on sequential transfers, given that SATA is capped around 550MB/s
It's Proverbs 17:28
In fairness, the author didn't specify the "class" of drive. He simply said 100 GBP or less, and storage didn't matter to him because his application needed less than 10GB per month of data collection.
The above is for laptop users. In data centers, sure, get the fastest IOPS... which depending on the interface, may be Intel.
So you'd rather have a 10W brick doing 300 IOPS, than a nice quiet reliable SSD pulling under 2 watts and doing 20,000 IOPS?
Intel may not be the fastest, but once you're above about 10-20k IOPS, all that matters is reliability.
In fairness, most vendors have this option.
You can either choose a 3/5 year warranty, and the drive will slow itself down to guarantee it lasts.
Or, you can choose to go by the "gas gauge" and your warranty may expire after 8 months or whatever of full-speed IO.
When you buy server-grade drives, they usually sell you a gas gauge model.
Article doesn't have a good description.
My guess is you take a bunch of timelapse frames of the same sky.
Then you overlay them at offsets in different directions which would keep any moving objects in the same place.
Picture doing 36000 sequences of overlays:
360 degree variation in 0.1 degree increments at 10 different radial velocities
Most of those sequences will just show blurred gray washout, but if you happened to hit the right direction as a moving object at the right speed, your overlaid image sequence will effectively keep the moving object in the same spot of the frame, which will result in the average brightness for that pixel or pixles to be higher than the surrounding blurs.
Just a guess...
A holstered weapon is a safe weapon.
Don't fingerfuck your carry piece and you'll be fine.
The presence of guns generally signals belligerence, except in very narrowly defined circumstances - e.g. at a shooting range, in a police station or military training facility.
As a general rule - if you are in a country with generally free emigration laws and people make a habit of carrying guns, then something is terribly amiss and you need to get out of there. Two possibilities:
1. The people carrying guns have drastically overestimated the danger, in which case, you need to move away - people with bad judgement and no ability to accurately assess personal risk pose a danger to those around them.
2. The people have accurately assessed the danger and so you are in danger as well, from whatever threat they are facing. You have no good basis for staying in such a place, unless you are a war correspondent or in the military. The sensible thing to do is to leave.
Your first assertion is false. People who conceal carry do not do so because of the risk (probability of an event). They recognize the risk is incredibly small. It's the consequences of that risk (their death or the death of a member of their family) which is why they carry a gun, because that gun may save their life if used properly. The odds are tiny, but non zero.
Every concealed carry class teaches you that avoiding a confrontation is your #1 priority, and that your firearm is only for when faced with the threat of imminent bodily harm.
And... you got trolled, hard.
Yup. "I have been asked by a medium-sized business to help them come to grips with why their IT group is ineffective, loathed by all other departments, and runs at roughly twice the budget of what the CFO has deemed appropriate for the company's size and industry."
If the manager is routinely at 2x the budget and that's acceptable, the entire company is out of control. Any of the above reasons should be sufficient on their own for management to replace them, if they're actually beliefs held by executive management.
Until you get charged sales tax by the state in which the internet retailer exists.
2.5" rotating enterprise drives (both SATA and SAS) are a standard form factor.