That's an utterly idiotic means of getting error correction
Agreed.
plus it's still worthless against 2 sequential blocks being damaged
Why? You could wipe out an entire partition and still have data integrity.
Raid5 isn't at all a suited for data recovery on a single drive
Agreed. Though to be pedantic I was suggesting raidz, not RAID5.
a RAID4 without striping would be a slightly less bad idea
I don't think zfs offers anything like RAID4.
Writing a small script that periodically runs a parchive derivative on recently modified files/directories is a far better
I was thinking something like taking snapshots and then running parchive against the snapshot? I haven't put much thought into this - drives are cheap.
but a file systems implementing it would still be far superior.
Yes, but it is kind of an edge case... yeah, you sometimes get some SMART warning about a failing drive, but who wants to image a failing drive and then apply parity tools? At that point you might as well just put in a new drive and restore from backup.
I was proposing this "solution" facetiously - no sane person would live with such a setup.
I wonder if an enterprising developer could make a browser that works like Silk on Kindles or Opera Mini, where it sends a modified version of the page to the device. Then they could enable MTCP on their own server if iOS will let them enable it for their app.
I don't know where you live but it must be something to have 4 inches of snow most of the year!
Where I live, we get snowstorms. I creep to work or stay home. But it's maybe a few days out of the year - less than a few percentage points. If the car could drive me around on all but 5 or 10% of my days, it might still be worth having.
Humans are also willing to go "aw, fuck it" and plow ahead where they think the road should be. No sane company executive is going to approve that in an automatic driving package. Maybe for the military gear.
You can replace a disk any time, but the pool won't use the entire capacity of the disk if it is larger than the others.
I chose a mirror because it wasted the least amount of space: mirror1 - 500GB drive and 750GB drive mirror2 - 2x 2TB drives
So my mirror gives me 2TB + 500GB = 2.5TB with 2-drive redundancy. 250GB of my 750GB drive was not used. Later I swapped both smaller drives for 3TB drives when they went on sale Black Friday for $89. When zfs saw the new space, it increased the pool size to 5GB. So now my array doesn't waste any space with 2-drive redundancy.
Had I chosen to do a zraid originally, I would have wasted a lot of space because each drive would be limited to the smallest individual drive's space. So with 1 drive redundancy I would have had 3x500GB = 1.5TB or with 2-drive redundancy I would have had 2x500GB = 1 TB. That obviously wasn't going to be my strategy:) If I switched to zraid with 1-drive redundancy today, I would get 3x2TB = 6TB. 2-drive redundancy would get me 4TB. My mirrors give me sort-of 2 drive redundancy. Obviously, it depends which drives:) Since this is mostly a backup server with no unique data on it except for TV media center storage, I've judged this an acceptable risk:)
I enjoy driving enough that I built a race car. I hate driving on the road, though, unless there's a clear twisty road - but how often does that happen? I'm probably only an average driver, but it's hard to judge. I haven't caused an accident in probably 20 years, and I haven't gotten a traffic ticket in 15. I've had some people run into the back of me, though.
The BMW will always cost more than the shitbox, that's the problem with threatening the driver of the shitbox.
For the record, I stay right and pass left and left lane slowpokes are just the worst - but it's hilarious to watch aggressive "drivers" in traffic. Around the beltway in DC, I can go 20 miles watching a guy bob and weave while I camp in a lane. He probably gained 60 seconds in 25 minutes of driving.
You might have noticed that most cars on the road are not fun to drive. You can tell the people in fun-to-drive cars, because they seem to believe that the rest of us are mere obstacles on their plaything.
What most NPEs do is sit on the patent and wait for someone to independently come up with the same innovation, and then demand payment. They are just parasites.
Exactly the problem. We need to consider whether patents really encourage innovation, or whether the state of the art is more of an inevitable progression. As a thought experiment, it's easy to look at Einstein and think that maybe the world would be very different without him. But the alternate view - and the one that seems more likely - is that someone else would have discovered special relativity... that he simply came to the natural conclusion that many others working on the same problem would when presented with the same facts.
Some patents probably do deserve to exist. There are probably drugs that would never have been developed without a patent. Not because the science is novel, but because so much money was required to develop it. But a thought experiment costs nothing - an idea by itself is usually worthless. A guy could come up with an idea for a clever gear arrangement that will save 1% of the energy that goes into a drive-train. But until he actually builds and demonstrates the idea, it is not worth anything. We need to refocus patents on the doers and less on the thinkers. When people actually making something can't progress the state of the art because someone else had an idea, we have a problem.
I completely wiffed that one. I thought the MSRP of an iPhone was $449, but it is $549, so the T-Mobile price is actually a discount. IMHO that would leave little reason to pay cash up front (except it prevents you from getting their sweet $30/month for 5GB pre-pay plan).
Back when I set this up, I spent a couple of weeks playing with various solutions in VirtualBox. It is especially easy to play with ZFS, since you can "yank" and add drives so easily inside VirtualBox. You can even simulate corruption by writing to the disk images. FreeNAS was very tempting at the time, but still had some things I couldn't work around. They seem to have put a lot of work into it since then.
Slashdot Mirror
That's an utterly idiotic means of getting error correction
Agreed.
plus it's still worthless against 2 sequential blocks being damaged
Why? You could wipe out an entire partition and still have data integrity.
Raid5 isn't at all a suited for data recovery on a single drive
Agreed. Though to be pedantic I was suggesting raidz, not RAID5.
a RAID4 without striping would be a slightly less bad idea
I don't think zfs offers anything like RAID4.
Writing a small script that periodically runs a parchive derivative on recently modified files/directories is a far better
I was thinking something like taking snapshots and then running parchive against the snapshot? I haven't put much thought into this - drives are cheap.
but a file systems implementing it would still be far superior.
Yes, but it is kind of an edge case... yeah, you sometimes get some SMART warning about a failing drive, but who wants to image a failing drive and then apply parity tools? At that point you might as well just put in a new drive and restore from backup.
I was proposing this "solution" facetiously - no sane person would live with such a setup.
I'm pretty sure that plants can't concentrate pure O2...
We do!
What's the name of your distribution? I'll be avoiding that one!
I wonder if an enterprising developer could make a browser that works like Silk on Kindles or Opera Mini, where it sends a modified version of the page to the device. Then they could enable MTCP on their own server if iOS will let them enable it for their app.
I don't know where you live but it must be something to have 4 inches of snow most of the year!
Where I live, we get snowstorms. I creep to work or stay home. But it's maybe a few days out of the year - less than a few percentage points. If the car could drive me around on all but 5 or 10% of my days, it might still be worth having.
Think of the additional beating they can give their wife and kids in that time!
Humans are also willing to go "aw, fuck it" and plow ahead where they think the road should be. No sane company executive is going to approve that in an automatic driving package. Maybe for the military gear.
You can replace a disk any time, but the pool won't use the entire capacity of the disk if it is larger than the others.
I chose a mirror because it wasted the least amount of space:
mirror1 - 500GB drive and 750GB drive
mirror2 - 2x 2TB drives
So my mirror gives me 2TB + 500GB = 2.5TB with 2-drive redundancy. 250GB of my 750GB drive was not used. Later I swapped both smaller drives for 3TB drives when they went on sale Black Friday for $89. When zfs saw the new space, it increased the pool size to 5GB. So now my array doesn't waste any space with 2-drive redundancy.
Had I chosen to do a zraid originally, I would have wasted a lot of space because each drive would be limited to the smallest individual drive's space. So with 1 drive redundancy I would have had 3x500GB = 1.5TB or with 2-drive redundancy I would have had 2x500GB = 1 TB. That obviously wasn't going to be my strategy :) If I switched to zraid with 1-drive redundancy today, I would get 3x2TB = 6TB. 2-drive redundancy would get me 4TB. My mirrors give me sort-of 2 drive redundancy. Obviously, it depends which drives :) Since this is mostly a backup server with no unique data on it except for TV media center storage, I've judged this an acceptable risk :)
There are people who love to drive, and then there are the people who do not own a BMW.
Why should I pay for that expensive addition then?
If 4 inches of snow is that common where you live, you shouldn't. But don't project your unique use case on the rest of us :)
I enjoy driving enough that I built a race car. I hate driving on the road, though, unless there's a clear twisty road - but how often does that happen? I'm probably only an average driver, but it's hard to judge. I haven't caused an accident in probably 20 years, and I haven't gotten a traffic ticket in 15. I've had some people run into the back of me, though.
Oh noes, it's ROAD RAGE!
The BMW will always cost more than the shitbox, that's the problem with threatening the driver of the shitbox.
For the record, I stay right and pass left and left lane slowpokes are just the worst - but it's hilarious to watch aggressive "drivers" in traffic. Around the beltway in DC, I can go 20 miles watching a guy bob and weave while I camp in a lane. He probably gained 60 seconds in 25 minutes of driving.
It will always let you drive...
The frustration in your eyes is OUR sport.
I don't think you need to worry - worst case you will be banned from the highway and your insurance rates will suck.
You might have noticed that most cars on the road are not fun to drive. You can tell the people in fun-to-drive cars, because they seem to believe that the rest of us are mere obstacles on their plaything.
ambiguous terrain because of massive snow on the road,
Unlike humans, it will probably do the smart thing and stop.
What most NPEs do is sit on the patent and wait for someone to independently come up with the same innovation, and then demand payment. They are just parasites.
Exactly the problem. We need to consider whether patents really encourage innovation, or whether the state of the art is more of an inevitable progression. As a thought experiment, it's easy to look at Einstein and think that maybe the world would be very different without him. But the alternate view - and the one that seems more likely - is that someone else would have discovered special relativity... that he simply came to the natural conclusion that many others working on the same problem would when presented with the same facts.
Some patents probably do deserve to exist. There are probably drugs that would never have been developed without a patent. Not because the science is novel, but because so much money was required to develop it. But a thought experiment costs nothing - an idea by itself is usually worthless. A guy could come up with an idea for a clever gear arrangement that will save 1% of the energy that goes into a drive-train. But until he actually builds and demonstrates the idea, it is not worth anything. We need to refocus patents on the doers and less on the thinkers. When people actually making something can't progress the state of the art because someone else had an idea, we have a problem.
I completely wiffed that one. I thought the MSRP of an iPhone was $449, but it is $549, so the T-Mobile price is actually a discount. IMHO that would leave little reason to pay cash up front (except it prevents you from getting their sweet $30/month for 5GB pre-pay plan).
It's in line with credit card interest rates. I think you'd be an idiot to buy one, but it's not completely absurd.
Even a Cadillac can be financed for a single-digit interest rate! :)
Behold :)
Back when I set this up, I spent a couple of weeks playing with various solutions in VirtualBox. It is especially easy to play with ZFS, since you can "yank" and add drives so easily inside VirtualBox. You can even simulate corruption by writing to the disk images. FreeNAS was very tempting at the time, but still had some things I couldn't work around. They seem to have put a lot of work into it since then.
Crusty also seems to be on the team.
Some detail about the issue here.
I think they will get it sorted out. Orbital has a lot of launches under their belt.