It might give the OpenSolaris^W Illumos community a chance to succeed, being actually open.
Their efforts would be _vastly_ better spent helping to port and/or maintain the handful of genuinely interesting features (ZFS, DTrace, etc) in OpenSolaris, to FreeBSD.
Now what will happen, is they'll waste their time spinning their wheels for a few years fighting against Oracle's disinterest (if not outright hostility) before the plug is finally pulled for good.
OpenSolaris was a dead platform the day Oracle bought Sun. It amazes me it's taken some people so long to come to that realisation, and utterly blows my mind that there are people who still haven't.
One of the problems with western style democracies is they tend to focus power into urban centers and drain rural areas of resources... so the cities (small percentage of the population) are getting wealthier but the countryside (most of the population) is getting poorer.
There's nothing specific about "western sytle democracies" with regards to this. It's happened with all forms of government throughout known history, and probably before then as well.
This is likely do to the same reason, he's electing to dislike vegetables, and some are simply electing to be hawkish about quality.
Not sure I agree completely with your logic there. I also hate most vegetables, but I can stand them so long as they're well disguised. The flavour and texture of "a big pile of veggies" on a slice of pizza (mixed with sauce, cheese, crust, etc) is vastly different to eating them on their own (not to mention a lot less healthy).
Obviously your boy was putting on a show, but that doesn't mean he is when it comes to not liking a simple plate of mixed plants.
Why do we see this meme so often? Solar and wind energy is used to produce electricity. Electricity isn't significantly produced by oil, it's mostly coal, followed by nuclear, hydro, and natural gas...
Because sufficient electricity can significantly replace oil use in vehicles, especially in countries where it's unusual to drive long distances.
We usually advise against it if possible, but some of that is consulting CYA; when clients are new to virtualization they are often very sensitive to perceived performance differences between physical and virtual systems. A new virtual environment where someone decided they wanted 8 Windows machines with 8 GB RAM running in 32 GB physical RAM usually gets too far oversubscribed, swaps hard (on a SAN) and the customer complains mightily.
Well, that (swapping) should only happen if the VMs really do need and use all 8GB of RAM at the same time - in which case it's the host that is improperly sized, not the VMs.
The point and benefit of being able to oversubscribe RAM is that your VMs won't all use all of their RAM at the same time, thus allowing you to make better utilisation of your hardware. Probably the second most important benefit is to circumvent having to convince people that their Domain Controller doesn't really need 2GB of RAM to run effectively, even if it's currently on a physical box with that much (or something similar).
I must admit I'm kind of surprised whenever I see (non-trivial) VM environments that don't oversubscribe RAM (assuming the Hypervisor is capable). It's kind of defeating one of the main purposes for virtualising.
Usually we find that a little tuning of VMs makes sense, since you don't have to robotically give every x32 system 4 GB RAM or every x64 system 8 or 16 GB RAM. "Detuning" the RAM from individual VMs is almost always possible and allows you to keep your VMs RAM sum running within the total physical RAM and avoid the possibility of swapping.
The problem there is you can end up spending a LOT of time babysitting VMs, trying to find their optimal RAM allocation.
Which is not to say that you should just go out and give VMs $LOTS_OF_RAM just because you can, as you note, but more that you don't need to do the VM babysitting I mention earlier and, more important, your VMs are more capable of handling varying workloads throughout the day.
In many ways it's less of an issue than it was, say, a few years ago, too. The CPUs have gotten so powerful that it actually makes sense to buy less CPU per node but buy more nodes (and hence more RAM). The bonus generally being overall more RAM, generally better performance (since I/O is distributed) and greater HA capacity.
The problem then becomes that more nodes == more licensing costs. You are right that RAM is generally the first bottleneck, however, which is why you should get hosts with as much RAM as possible.
Point in case, there is a school (i.e. 30 km/h for about 50 meters) directly after a normal out-of-city street (i.e. 100 km/h).
German road engineering is typically very good. I'm a bit sceptical that they have a 30km/h school zone in the middle of an otherwise 100km/h open road, that doesn't at least step down through an 80km/h zone first.
During the last school holidays, they left the limit signs up. Was it wrong to go through those 50 meters at 50 km/h, which is the normal inner city speed? Especially since they removed the signs during this holiday season and in the ones before?
Yes. This is especially true if the school is the one responsible for putting the signs up and down, because they might know something about what's happening there that you don't, and hence have had a good reason for putting the signs up.
There are times and places to drive fast. Urban areas are most definitely not one of them.
Average VM working set * number of VMs - a few hundred MB for Hypervisor and overheads.
Generally speaking, IME, you don't even need to _begin_ worrying until your RAM is oversubscribed above 2:1 (obviously YMMV depending on what your VMs are doing).
Oversubscription only works when the individual VMs aren't doing much. If you have a pile of VMs oversubscribed to the degree TFA is talking about, it means the VM overhead is exceeding the useful computation. There are cases where that can't be helped, such as each VM is a different customer, but in an enterprise environment, it suggests that you should be running more than one service per instance and have less instances.
No, you ideally want as few services per instance as possible, to reduce dependencies and simplify architectures.
A dozen small VMs running a single service each, is generally easier to look after than a single server running a dozen different services, especially if your environment involves customers and/or services with differing availability requirements.
I swear, some in the trade rags seem to honestly think there is a benefit to splitting a server into 16 VMs and then combining those into a virtual beowulf cluster for production work (it makes perfect sense for development and testing, of course).
There are numerous examples where multiple clustered VMs will perform better than a single OS image, on the same hardware.
VMware has allowed RAM oversubscription for years. Indeed, it's one of the killer features of that platform over the alternatives. Who out there using VMware in non-trivial environments _isn't_ oversubscribing RAM ?
Keep them as cool as Dells? That's not hard. Dell's drive bays are notoriously bad. Some of the ones from 4 and 5 years ago are much more poorly designed than the Supermicro cage.
I'm not quite sure I understand your argument. Both Dell's servers and the Supermicro cage are quite capable of keeping drives cool enough to fit into the low failure temperature bracket and you've already noted that keeping them too cool can produce negative affects.
Once you've hit "cool enough", any more is mostly pointless and at worst damaging.
The thermaltake bay converters with the 120cm fan, on the other hand, do a great job keeping the drives nice and cool.
Assuming you're talking about this, they'd damn well want to with only 3/5ths the density. Hell, it'd be a challenge to design the thing badly enough _not_ to keep the drives "nice and cool".
Generally the Mac will have less ports, but has as compensation the large multi-touch track pad, [...]
While I like the large trackpads MacBooks have, the new "just a great big button" design in the current Macs is absolutely awful to use for anything involving clicking and dragging.
Correction: Note that the average person is generally prepared to say that they'll pay "high taxes" when they do actually get good services for them.
The quintessential example is the Nordic countries, with their relatively high tax rates, excellent social services, and very happy people because of it.
I've used your supermicro 5-drive cages before. They're the best of the bunch. The front air intakes are quite respectable compared to most 5-drive cages. But even they are crammed too close and there aren't enough holes in the backplane to let the fan drag enough air through the cage.
If your objective is to keep the drives as cool as possible, not to make as little noise as possible while keeping them just cool enough, a much higher airflow fan will easily do so, assuming the ambient temperature is adequately low (like, say, in a DC or server closet).
I've used these cages in machines in data centres, and they keep the drives just as cool as the hotswap bays in Dell 2950s and the like, and certainly cool enough to fit into that "least failures" temperature bracket.
The MS way usually is to pretend that it's easy. The docs consist of a leaflet that explains how to open your cd drive and place the cd the right side up, and how to handle the mouse to make the cursor move to the "Ok" button.
The five-drive cases suck rocks when it comes to cooling. There isn't enough space between drives to move the air. Thermaltake's 4-drive converter actually keeps the drives cool, improving their life span.
I have 4 of these in an Antec 1200, and with the stock fans replaced with Noctua NF-B9 fans, it's not only nearly silent it keeps the drives under about 38 C (100 F). Since Google's research showed no appreciable correlation between drive temperature and failures rates until ~45+ C, that's good enough for me.
Indeed. Only a few months ago I was searching long and hard to find a case that had enough 5.25 bays (10+) to build a decent fileserver with, using these. Eventually I managed to find an Antec 1200 at about 50% off list and went with that, but damn it was difficult find _any_ cases with that many bays, that a) weren't rackmount or b) weren't stupidly expensive.
Re:Don't f* with the IT guy like at restaurant you
on
Child Porn As a Weapon
·
· Score: 1
Those questions can be answered once the pedo apologists can provide a legitimate case of a child completely on their own seeking out to have a sexual relationship with an adult (cases of a 14 year old having sex with say a 16 or 17 year old don't count).
How about an 18, 19 or 20 year old ? Not exactly an uncommon scenario, especially if the younger party lies about their age.
I don't think I've met anyone who says "OS Ten" instead of "OS Ex" for half a decade or more. Even the oldtimers, for whom "OS Ten" is actually meaningful, all say "OS Ex" now.
I'd be quite willing to lay down a hundred bucks betting that the next version of MacOS after 10.9, will be either MacOS X 11.0, or MacOS X 10.10, and not MacOS XI.
(And since we're not going to find out until 2020 or so, even if I'm wrong that hundred bucks will probably only be as much as I pay for lunch each day.)
Slashdot Mirror
It might give the OpenSolaris^W Illumos community a chance to succeed, being actually open.
Their efforts would be _vastly_ better spent helping to port and/or maintain the handful of genuinely interesting features (ZFS, DTrace, etc) in OpenSolaris, to FreeBSD.
Now what will happen, is they'll waste their time spinning their wheels for a few years fighting against Oracle's disinterest (if not outright hostility) before the plug is finally pulled for good.
OpenSolaris was a dead platform the day Oracle bought Sun. It amazes me it's taken some people so long to come to that realisation, and utterly blows my mind that there are people who still haven't.
But OpenSolaris only supports a miniscule amount of the x86 hardware that Linux does [...]
It has excellent hardware support where it matters - brand-name x86 servers (largely because they're all using the same components anyway).
Specific to western democracies no, but it is a common characteristic that they share which is not universal to all governmental forms.
Which ones don't result in it ?
One of the problems with western style democracies is they tend to focus power into urban centers and drain rural areas of resources... so the cities (small percentage of the population) are getting wealthier but the countryside (most of the population) is getting poorer.
There's nothing specific about "western sytle democracies" with regards to this. It's happened with all forms of government throughout known history, and probably before then as well.
This is likely do to the same reason, he's electing to dislike vegetables, and some are simply electing to be hawkish about quality.
Not sure I agree completely with your logic there. I also hate most vegetables, but I can stand them so long as they're well disguised. The flavour and texture of "a big pile of veggies" on a slice of pizza (mixed with sauce, cheese, crust, etc) is vastly different to eating them on their own (not to mention a lot less healthy).
Obviously your boy was putting on a show, but that doesn't mean he is when it comes to not liking a simple plate of mixed plants.
Gaming devices? Who would put an Xbox, Wii, etc. in a car?
People with kids ? DVD players and headrest LCDs are pretty common, throwing in a PS3 or XBox360 as well isn't much of a stretch.
Why do we see this meme so often? Solar and wind energy is used to produce electricity. Electricity isn't significantly produced by oil, it's mostly coal, followed by nuclear, hydro, and natural gas...
Because sufficient electricity can significantly replace oil use in vehicles, especially in countries where it's unusual to drive long distances.
We usually advise against it if possible, but some of that is consulting CYA; when clients are new to virtualization they are often very sensitive to perceived performance differences between physical and virtual systems. A new virtual environment where someone decided they wanted 8 Windows machines with 8 GB RAM running in 32 GB physical RAM usually gets too far oversubscribed, swaps hard (on a SAN) and the customer complains mightily.
Well, that (swapping) should only happen if the VMs really do need and use all 8GB of RAM at the same time - in which case it's the host that is improperly sized, not the VMs.
The point and benefit of being able to oversubscribe RAM is that your VMs won't all use all of their RAM at the same time, thus allowing you to make better utilisation of your hardware. Probably the second most important benefit is to circumvent having to convince people that their Domain Controller doesn't really need 2GB of RAM to run effectively, even if it's currently on a physical box with that much (or something similar).
I must admit I'm kind of surprised whenever I see (non-trivial) VM environments that don't oversubscribe RAM (assuming the Hypervisor is capable). It's kind of defeating one of the main purposes for virtualising.
Usually we find that a little tuning of VMs makes sense, since you don't have to robotically give every x32 system 4 GB RAM or every x64 system 8 or 16 GB RAM. "Detuning" the RAM from individual VMs is almost always possible and allows you to keep your VMs RAM sum running within the total physical RAM and avoid the possibility of swapping.
The problem there is you can end up spending a LOT of time babysitting VMs, trying to find their optimal RAM allocation.
Which is not to say that you should just go out and give VMs $LOTS_OF_RAM just because you can, as you note, but more that you don't need to do the VM babysitting I mention earlier and, more important, your VMs are more capable of handling varying workloads throughout the day.
In many ways it's less of an issue than it was, say, a few years ago, too. The CPUs have gotten so powerful that it actually makes sense to buy less CPU per node but buy more nodes (and hence more RAM). The bonus generally being overall more RAM, generally better performance (since I/O is distributed) and greater HA capacity.
The problem then becomes that more nodes == more licensing costs. You are right that RAM is generally the first bottleneck, however, which is why you should get hosts with as much RAM as possible.
Point in case, there is a school (i.e. 30 km/h for about 50 meters) directly after a normal out-of-city street (i.e. 100 km/h).
German road engineering is typically very good. I'm a bit sceptical that they have a 30km/h school zone in the middle of an otherwise 100km/h open road, that doesn't at least step down through an 80km/h zone first.
During the last school holidays, they left the limit signs up. Was it wrong to go through those 50 meters at 50 km/h, which is the normal inner city speed? Especially since they removed the signs during this holiday season and in the ones before?
Yes. This is especially true if the school is the one responsible for putting the signs up and down, because they might know something about what's happening there that you don't, and hence have had a good reason for putting the signs up.
There are times and places to drive fast. Urban areas are most definitely not one of them.
What's the limit?
Average VM working set * number of VMs - a few hundred MB for Hypervisor and overheads.
Generally speaking, IME, you don't even need to _begin_ worrying until your RAM is oversubscribed above 2:1 (obviously YMMV depending on what your VMs are doing).
Oversubscription only works when the individual VMs aren't doing much. If you have a pile of VMs oversubscribed to the degree TFA is talking about, it means the VM overhead is exceeding the useful computation. There are cases where that can't be helped, such as each VM is a different customer, but in an enterprise environment, it suggests that you should be running more than one service per instance and have less instances.
No, you ideally want as few services per instance as possible, to reduce dependencies and simplify architectures.
A dozen small VMs running a single service each, is generally easier to look after than a single server running a dozen different services, especially if your environment involves customers and/or services with differing availability requirements.
I swear, some in the trade rags seem to honestly think there is a benefit to splitting a server into 16 VMs and then combining those into a virtual beowulf cluster for production work (it makes perfect sense for development and testing, of course).
There are numerous examples where multiple clustered VMs will perform better than a single OS image, on the same hardware.
VMware has allowed RAM oversubscription for years. Indeed, it's one of the killer features of that platform over the alternatives. Who out there using VMware in non-trivial environments _isn't_ oversubscribing RAM ?
Nobody ever got rich by spending more money than they have.
Lots of bankers would disagree.
Keep them as cool as Dells? That's not hard. Dell's drive bays are notoriously bad. Some of the ones from 4 and 5 years ago are much more poorly designed than the Supermicro cage.
I'm not quite sure I understand your argument. Both Dell's servers and the Supermicro cage are quite capable of keeping drives cool enough to fit into the low failure temperature bracket and you've already noted that keeping them too cool can produce negative affects.
Once you've hit "cool enough", any more is mostly pointless and at worst damaging.
The thermaltake bay converters with the 120cm fan, on the other hand, do a great job keeping the drives nice and cool.
Assuming you're talking about this, they'd damn well want to with only 3/5ths the density. Hell, it'd be a challenge to design the thing badly enough _not_ to keep the drives "nice and cool".
Generally the Mac will have less ports, but has as compensation the large multi-touch track pad, [...]
While I like the large trackpads MacBooks have, the new "just a great big button" design in the current Macs is absolutely awful to use for anything involving clicking and dragging.
Why run Windows at all if you don't need "crutches"?
Because it's fast, featureful, runs all the software I want better than the alternatives, and doesn't require me to overpay for the hardware I want.
In what world is Windows considered sophisticated or modern?
What features is it lacking that can be found in other "sophisticated or modern" OSes ?
Correction: Note that the average person is generally prepared to say that they'll pay "high taxes" when they do actually get good services for them.
The quintessential example is the Nordic countries, with their relatively high tax rates, excellent social services, and very happy people because of it.
I've used your supermicro 5-drive cages before. They're the best of the bunch. The front air intakes are quite respectable compared to most 5-drive cages. But even they are crammed too close and there aren't enough holes in the backplane to let the fan drag enough air through the cage.
If your objective is to keep the drives as cool as possible, not to make as little noise as possible while keeping them just cool enough, a much higher airflow fan will easily do so, assuming the ambient temperature is adequately low (like, say, in a DC or server closet).
I've used these cages in machines in data centres, and they keep the drives just as cool as the hotswap bays in Dell 2950s and the like, and certainly cool enough to fit into that "least failures" temperature bracket.
2) Low taxes
Note that the average person is generally prepared to pay "high taxes" when they do actually get good services for them.
There's nothing specific to government about this, it happens just as much in private enterprise.
The MS way usually is to pretend that it's easy. The docs consist of a leaflet that explains how to open your cd drive and place the cd the right side up, and how to handle the mouse to make the cursor move to the "Ok" button.
Can you link to an example of this ?
The five-drive cases suck rocks when it comes to cooling. There isn't enough space between drives to move the air. Thermaltake's 4-drive converter actually keeps the drives cool, improving their life span.
I have 4 of these in an Antec 1200, and with the stock fans replaced with Noctua NF-B9 fans, it's not only nearly silent it keeps the drives under about 38 C (100 F). Since Google's research showed no appreciable correlation between drive temperature and failures rates until ~45+ C, that's good enough for me.
It even uses the power.
Indeed. Only a few months ago I was searching long and hard to find a case that had enough 5.25 bays (10+) to build a decent fileserver with, using these. Eventually I managed to find an Antec 1200 at about 50% off list and went with that, but damn it was difficult find _any_ cases with that many bays, that a) weren't rackmount or b) weren't stupidly expensive.
Those questions can be answered once the pedo apologists can provide a legitimate case of a child completely on their own seeking out to have a sexual relationship with an adult (cases of a 14 year old having sex with say a 16 or 17 year old don't count).
How about an 18, 19 or 20 year old ? Not exactly an uncommon scenario, especially if the younger party lies about their age.
"Mac Oh Ess Ex Ten point six".
I don't think I've met anyone who says "OS Ten" instead of "OS Ex" for half a decade or more. Even the oldtimers, for whom "OS Ten" is actually meaningful, all say "OS Ex" now.
I'd be quite willing to lay down a hundred bucks betting that the next version of MacOS after 10.9, will be either MacOS X 11.0, or MacOS X 10.10, and not MacOS XI.
(And since we're not going to find out until 2020 or so, even if I'm wrong that hundred bucks will probably only be as much as I pay for lunch each day.)