out of interest is there a way to say to zfs you want to access the copy despite it being corrupt?
Sometimes having a copy with some corruption is better than not having a copy at all, particularlly with formats like mpeg that are designed for streaming.
I think the article offers a number of good ideas but it would be better to do most of them at the filesystem and perhaps some at the storage layer.
Also if we can present the same logical file when read to the application even if every 9th byte is parity on the disk that is a plus because it means legacy apps can get the enhanced protection as well. The downside of this approach is that the checksums are not end to end. Every time the file is transfered from one location to another there is potential for corruption.
For years I've wondered why we still have phone numbers. The same reason we still have IPV4, transitioning a huge network to a new identification system is an immense PITA. Furthermore unlike IPV4 addresses phone numbers are variable length and while there is a max length set most countries are some way off it so running out of phone numbers is unlikely to happen anytime soon though some countries may need to have somewhat painful (but still less painful than moving to a non-numeric system) restructurings/lengthenings as thier user count grows.
well a reasonablly fast easy to remember public dns server is a boon for those of us who want to get a machine online quickly and don't know offhand what dns servers are availible on the network, yeah there was opendns but they do some weird stuff and the 4.2.2.x servers while functional are not really meant to be public afaict and are often very slow.
It's also useful for those whose ISPs dns servers suck (either doing stupid shit or simply being slow.
Also they are doing some clever stuff related to caching which should hopefully reduce cache misses (dns cache misses can be very time consuming depending on where the authoritive servers are and how long the chain is).
I strongly suspect that even if the infrastructure behind the phone system completely changes (as it has once before with the transition from analog to digital) the end user interfaces and therefore the numbering system will stay the same. Anything else would require massive forklift upgrades for all phone network customers and I can't see that being popular.
I setup my own DNS but I guess it is a little overkill for the common every day user. Setting your own DNS means you have to go to the network (e.g. internet) less often because your locally hosted DNS caches the already visited sites for a TTL period of time. OTOH if your server is a full resolver (rather than a cache using someone elses resolves) your machines has to work down the tree of servers to resolve a name. That means potentially a lot of round trips to resolve a single name (not good if your latency is poor)
Oh, and what the fuck would you call a hard drive or optical drive, huh? It's an electro-mechanical device but I bet you do work on those! I doubt they do any work on hard drives and optical drives beyond swapping them out.
But I agree the fact it's an electromechanical device isn't what is relavent. The real problem is that a low end printer without ink is pretty much worthless since the ink often costs as much as a new printer. Further with many printers removing and refitting cartridges wastes quite a lot of ink in loading cycles making testing printers relatively expensive.
So if you're a very low volume printer, then lasers are probably not worth the investments. The trouble with inkjets is if you are a very low volume user or you need to store printers for a while (e.g. your circumstances change) you tend to lose cartridges (and often printheads too) not to them running out but them to them getting clogged up. This is particularlly bad with epsons since afaict epson printheads are not econonmically replacable. I don't think i've ever had this issue with a laser.
If you don't need color I would definately reccomend a mono laser. I can't comment on color lasers as last time I looked the prices were still too high at least if you wanted niceties like networking.
One thing to bear in mind is that not all inkjets are equal, my parents bought an officejet a while ago. It was quite a bit pricier than your basic inkjet (about £100 iirc) but a lot cheaper and smaller than a networkable color laser (I much preffering having printers networked directly, windows print sharing doesnt seem to get on with all printers and having to turn on an extra computer before you can print is a PITA). The cartriges are comparable in price to those for previous printers we have owned but FAR larger capacity.
While things do vary in general cheap printers are expensive to run.
Despite the use of the term market share in the/. summary these figures are not based on sales (yeah/. editors suck). They are based on the user agents
Of course those aren't brilliant either since they won't count systems that are never used to access the web at all and will disproportionately count systems that are used to access the web more often.
If the figures were actually market share numbers they would count XP far lower since afaict the only ways to get XP nowadays are either to buy it with a netbook/nettop (still a fairly small part of the market afaict), buy old stock (which may or may not be counted depending on where in the supply chain they count) or buy vista and use downgrade rights (which would count as a vista sale not an XP one).
hear this a lot, but the queen is much stronger than the pawn But both players have one queen eight pawns and so on. So the players are still balanced. and the selection of peices are fixed so you don't get any peices left unused.
A game where there are multiple races and where players can select thier starting force up to some value limit and/or where people can build units during the game is much harder to get balanced. If you don't balance it well then you will be left with huge sections of the game unused because players who use them can't be competitive.
what about.co,.om? assigned to colombia and oman respectively but don't allow registrations directly under the tld so not useful for cybersquatters..con doesn't exist.
I also wonder whether slashdot.og is infested with viruses..og doesn't exist either
IIRC upgrade copies of 7 are valid for upgrding from XP even though you have to do a clean install, I dunno what if any methods they use to check you have a legitmiate copy of XP when doing so.
The feed they got from the hotel at Penguicon a few years back was a 220V 50A and I remember them having an ammeter on the line to make sure they didn't exceed the rating and trip the circuit. So about the same as an electric shower, maybe a little higher.
In other words expensive to run continuously but not too bad for occasional use.
I'm lost. Doesn't Dell take a standard Intel/AMD CPU and pair it with a standard Intel/VIA/SIS/Nvidia chipset? What is there to go wrong? At these speeds routing a board is far from a simple matter. Lengths, widths and proximity of tracks starts to matter a lot and is easy to get wrong. Worse change the laminate thicknesses slightly and the characteristics are going to change a bit, possiblly pushing you from just about in spec to out of spec just enough to make things unreliable (but not so bad that it fails outright).
A big problem is once someone decides that adverts are a problem and have to be blocked they are most likely to just download something like "adblock plus" and configure it with one of the default filter sets, these are setup to block all adverts not just the especially bad ones.
Rotating these screens to portrait, you'd get dual 600x1024 = 1200x1024. There's your vertical pixels back! Two screens next to each other are not equivalent to one wide one. While technically you can drag a window across if you do then you are going to end up with a horrible line right in the middle of your window.
Not that I think multimonitor is bad but I think having at least one screen with decent resoloution (not less than 1024 pixels wide, not less than 768 pixels high) is more important.
Dual screens are a nice convenience. Dual screens are indeed nice to have but IMO there are two big problems with this machine
1: The individual screens are 1024x600 which is just too low for many apps to be used comfortablly. 2: When unfolded this machine will be very wide, how often will you really have space to fully unfold it while on the go.
A big issue is that even if racism both conscious and subconscious was somehow eliminated (not going to happen) it would still probably take generations for things to even out. In general rich and/or powerful parents have rich and/or powerful kids.
I have read up on the different options when looking to buy a mobile broadband dongle and the answer seems to be that all the networks do it differently.
On O2 you buy access in blocks, there are three types of block each block has both a data ammount limit (500MB/1GB/3GB)and a time limit (1 day/1week/1motnh). One annoyance is that these blocks can only be bought with a credit/debit card.
IIRC one of the other networks had a long expiry pay as you go mobile broadband package but the price per unit traffic is much higher.
Afaict fakes tend to get in under two main scenarios
1: the customer is looking to do things on the cheap and goes to whoever is cheapest regardless of reputation 2: the customer is desperate for a particular (often discontinued) part and cannot get it from any of thier regular supplies, so they are forced to deal with whatever suppliers happen to claim stock of that part.
UK is 230V semi-true, the voltage at the consumers intake is supposed to be 230V+10%-6%
also a voltage drop of 5% of the nominal voltage is allowed in the design of the customers wiring.
So the voltage at the socket could be anywhere from 204.7V to 253V.
Every time i've actually measured it my measurements have been between 240V and 250V.
At one time it was 240V, but voltage rates have been harmonized. This is what I reffer to as fake harmonisation, the nominal voltage is harmonised but the tolerance bands are so wide that everyone can go on as before (and the tolerance bands are not harmonised either afaict)
A lot of the "adapters" you get to change European current to our 115 Volt tell you straight-up that they shouldn't be used for electronics. They aren't kidding. mmm, i've heard of such crappy transformerless adaptors before though i've never seen one in person.
Mostly though modern electronics come with universal input switched mode power supplies. If you have these then you don't have to worry about voltage conversion at all and can just use passive adaptors.
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out of interest is there a way to say to zfs you want to access the copy despite it being corrupt?
Sometimes having a copy with some corruption is better than not having a copy at all, particularlly with formats like mpeg that are designed for streaming.
I think the article offers a number of good ideas but it would be better to do most of them at the filesystem and perhaps some at the storage layer.
Also if we can present the same logical file when read to the application even if every 9th byte is parity on the disk that is a plus because it means legacy apps can get the enhanced protection as well.
The downside of this approach is that the checksums are not end to end. Every time the file is transfered from one location to another there is potential for corruption.
For years I've wondered why we still have phone numbers.
The same reason we still have IPV4, transitioning a huge network to a new identification system is an immense PITA. Furthermore unlike IPV4 addresses phone numbers are variable length and while there is a max length set most countries are some way off it so running out of phone numbers is unlikely to happen anytime soon though some countries may need to have somewhat painful (but still less painful than moving to a non-numeric system) restructurings/lengthenings as thier user count grows.
well a reasonablly fast easy to remember public dns server is a boon for those of us who want to get a machine online quickly and don't know offhand what dns servers are availible on the network, yeah there was opendns but they do some weird stuff and the 4.2.2.x servers while functional are not really meant to be public afaict and are often very slow.
It's also useful for those whose ISPs dns servers suck (either doing stupid shit or simply being slow.
Also they are doing some clever stuff related to caching which should hopefully reduce cache misses (dns cache misses can be very time consuming depending on where the authoritive servers are and how long the chain is).
I strongly suspect that even if the infrastructure behind the phone system completely changes (as it has once before with the transition from analog to digital) the end user interfaces and therefore the numbering system will stay the same. Anything else would require massive forklift upgrades for all phone network customers and I can't see that being popular.
I setup my own DNS but I guess it is a little overkill for the common every day user. Setting your own DNS means you have to go to the network (e.g. internet) less often because your locally hosted DNS caches the already visited sites for a TTL period of time.
OTOH if your server is a full resolver (rather than a cache using someone elses resolves) your machines has to work down the tree of servers to resolve a name. That means potentially a lot of round trips to resolve a single name (not good if your latency is poor)
Oh, and what the fuck would you call a hard drive or optical drive, huh? It's an electro-mechanical device but I bet you do work on those!
I doubt they do any work on hard drives and optical drives beyond swapping them out.
But I agree the fact it's an electromechanical device isn't what is relavent. The real problem is that a low end printer without ink is pretty much worthless since the ink often costs as much as a new printer. Further with many printers removing and refitting cartridges wastes quite a lot of ink in loading cycles making testing printers relatively expensive.
So if you're a very low volume printer, then lasers are probably not worth the investments.
The trouble with inkjets is if you are a very low volume user or you need to store printers for a while (e.g. your circumstances change) you tend to lose cartridges (and often printheads too) not to them running out but them to them getting clogged up. This is particularlly bad with epsons since afaict epson printheads are not econonmically replacable. I don't think i've ever had this issue with a laser.
If you don't need color I would definately reccomend a mono laser. I can't comment on color lasers as last time I looked the prices were still too high at least if you wanted niceties like networking.
One thing to bear in mind is that not all inkjets are equal, my parents bought an officejet a while ago. It was quite a bit pricier than your basic inkjet (about £100 iirc) but a lot cheaper and smaller than a networkable color laser (I much preffering having printers networked directly, windows print sharing doesnt seem to get on with all printers and having to turn on an extra computer before you can print is a PITA). The cartriges are comparable in price to those for previous printers we have owned but FAR larger capacity.
While things do vary in general cheap printers are expensive to run.
Despite the use of the term market share in the /. summary these figures are not based on sales (yeah /. editors suck). They are based on the user agents
Of course those aren't brilliant either since they won't count systems that are never used to access the web at all and will disproportionately count systems that are used to access the web more often.
If the figures were actually market share numbers they would count XP far lower since afaict the only ways to get XP nowadays are either to buy it with a netbook/nettop (still a fairly small part of the market afaict), buy old stock (which may or may not be counted depending on where in the supply chain they count) or buy vista and use downgrade rights (which would count as a vista sale not an XP one).
hear this a lot, but the queen is much stronger than the pawn
But both players have one queen eight pawns and so on. So the players are still balanced. and the selection of peices are fixed so you don't get any peices left unused.
A game where there are multiple races and where players can select thier starting force up to some value limit and/or where people can build units during the game is much harder to get balanced. If you don't balance it well then you will be left with huge sections of the game unused because players who use them can't be competitive.
what about .co, .om? .con
assigned to colombia and oman respectively but don't allow registrations directly under the tld so not useful for cybersquatters.
doesn't exist.
I also wonder whether slashdot.og is infested with viruses. .og doesn't exist either
IIRC upgrade copies of 7 are valid for upgrding from XP even though you have to do a clean install, I dunno what if any methods they use to check you have a legitmiate copy of XP when doing so.
The feed they got from the hotel at Penguicon a few years back was a 220V 50A and I remember them having an ammeter on the line to make sure they didn't exceed the rating and trip the circuit.
So about the same as an electric shower, maybe a little higher.
In other words expensive to run continuously but not too bad for occasional use.
I'm lost. Doesn't Dell take a standard Intel/AMD CPU and pair it with a standard Intel/VIA/SIS/Nvidia chipset? What is there to go wrong?
At these speeds routing a board is far from a simple matter. Lengths, widths and proximity of tracks starts to matter a lot and is easy to get wrong. Worse change the laminate thicknesses slightly and the characteristics are going to change a bit, possiblly pushing you from just about in spec to out of spec just enough to make things unreliable (but not so bad that it fails outright).
A big problem is once someone decides that adverts are a problem and have to be blocked they are most likely to just download something like "adblock plus" and configure it with one of the default filter sets, these are setup to block all adverts not just the especially bad ones.
http://en.wikipedia.org/wiki/Black_Friday_(shopping)
Rotating these screens to portrait, you'd get dual 600x1024 = 1200x1024. There's your vertical pixels back!
Two screens next to each other are not equivalent to one wide one. While technically you can drag a window across if you do then you are going to end up with a horrible line right in the middle of your window.
Not that I think multimonitor is bad but I think having at least one screen with decent resoloution (not less than 1024 pixels wide, not less than 768 pixels high) is more important.
Dual screens are a nice convenience.
Dual screens are indeed nice to have but IMO there are two big problems with this machine
1: The individual screens are 1024x600 which is just too low for many apps to be used comfortablly.
2: When unfolded this machine will be very wide, how often will you really have space to fully unfold it while on the go.
A big issue is that even if racism both conscious and subconscious was somehow eliminated (not going to happen) it would still probably take generations for things to even out. In general rich and/or powerful parents have rich and/or powerful kids.
I have read up on the different options when looking to buy a mobile broadband dongle and the answer seems to be that all the networks do it differently.
On O2 you buy access in blocks, there are three types of block each block has both a data ammount limit (500MB/1GB/3GB)and a time limit (1 day/1week/1motnh). One annoyance is that these blocks can only be bought with a credit/debit card.
IIRC one of the other networks had a long expiry pay as you go mobile broadband package but the price per unit traffic is much higher.
Afaict fakes tend to get in under two main scenarios
1: the customer is looking to do things on the cheap and goes to whoever is cheapest regardless of reputation
2: the customer is desperate for a particular (often discontinued) part and cannot get it from any of thier regular supplies, so they are forced to deal with whatever suppliers happen to claim stock of that part.
UK is 230V
semi-true, the voltage at the consumers intake is supposed to be 230V+10%-6%
also a voltage drop of 5% of the nominal voltage is allowed in the design of the customers wiring.
So the voltage at the socket could be anywhere from 204.7V to 253V.
Every time i've actually measured it my measurements have been between 240V and 250V.
At one time it was 240V, but voltage rates have been harmonized.
This is what I reffer to as fake harmonisation, the nominal voltage is harmonised but the tolerance bands are so wide that everyone can go on as before (and the tolerance bands are not harmonised either afaict)
A lot of the "adapters" you get to change European current to our 115 Volt tell you straight-up that they shouldn't be used for electronics. They aren't kidding.
mmm, i've heard of such crappy transformerless adaptors before though i've never seen one in person.
Mostly though modern electronics come with universal input switched mode power supplies. If you have these then you don't have to worry about voltage conversion at all and can just use passive adaptors.
and I expect you can find it at the local Tandy shop.
Tandy shut down years ago.
There is another chain called Maplin that fills roughly the niche that tandy used to. You can probablly also get the cables in most computer stores.