1. if you're using ZFS on both systems, you're *much* better off using 'zfs send' and 'zfs recv' than rsync.
do the initial full copy, and from then you can just send the incremental snapshot differences from then on.
one advantage of zfs send over rsync is that rsync has to check each file for changes (either file timestamp or block checksum or both) every time you rsync a filesystem or directory tree. With and incremental 'zfs send', it only sends the incremental difference between the last snapshot sent and the current snapshot.
you've also got the full zfs snapshot history on the remote copy as well as on the local copy.
(and, like rsync, you can still run the copy over ssh so that the transfer is encrypted over the network)
2. your price estimates seem very expensive. with just a little smart shopping, it wouldn't be hard to do what you're suggesting for less than half your estimate.
3. if you've got a choice between hardware raid and ZFS then choose ZFS. Even if you've already spent the money on an expensive hardware raid controller, just use it as JBOD and let ZFS handle the raid function.
> Just don't let ZFS know that there's more than 1 drive.
That is *precisely* the wrong thing to do. As in, the exact opposite of how you should do it.
Instead, configure the RAID card to be JBOD and let ZFS handle the multiple-drive redundancy (raidz and/or mirroring), as well as the error detection and correction.
Otherwise, there is little or no benefit in using ZFS. ZFS can't correct many problems if it doesn't have direct control over the individual disks, and RAID simply can't do the things that ZFS can do.
Of course, this means that you're actually better off with a cheap dumb non-raid HBA card (or even just the SATA ports on your motherboard if there's enough of them) than an expensive HW RAID card. This is another advantage of ZFS.
(a good option is to use an LSI SAS2008 card or similar, and make sure it's re-flashed to "IT" mode firmware if you're using consumer-grade SATA drives with it to avoid TLER issues. readily available brand new for under $100 for 8 SAS/SATA ports)
> You can't have them both trying to manage the redundant storage.
yes. and it's ZFS that should be managing it, not the raid card.
true, but you do need multiple disks (mirrored or raidz) to protect against drive failure.
two or more copies of your data on the one disk won't help at all if that disk dies.
fortunately, zfs can give you both raid-like multiple disk storage (mirroring and/or raidz) as well as errror detection and correction.
That ZFS_data_integrity link in the post you were replying to gives a pretty good summary of how it works.
The paragraphs immediately above that (titled 'Data integrity', 'Error rates in hard disks', and 'Silent data corruption') also give a good summary of why error-correcting filesystems like ZFS (and btrfs) are necessary, especially with the huge sizes of modern drives.
In fact, anyone interested should read the entire wikipedia article.
ps: neither raid nor ZFS is a substitute for backups. you still need backups of your data (preferably with off-site copies) to protect against accidental deletion or overwrite (snapshots can help with this if used intelligently prior to the event) or burglary or catastrophic damage like fire or flood.
expect to see a lot more of these "See, privacy invasion is good for you" articles. Their purpose is to "prove" that all this spying and data collection helps catch some very naughty people in icky foreign countries. some of them with really bad accents or even terrible mustaches (aka "proof of evil").
and the MBA mind thinks of GPL software like so: "we got it for free, so we should be able to mark it up and sell it for a squillion dollars...and lock it up so we've got a monopoly".
that's why they love the BSD license, and why there's so much corporate propaganda promoting BSD.
(there's nothing wrong with the BSD license. it's just easily exploitable - by design - by MBA arsehole types)
The BSD license is perfect for MBA types who think that externalising expenses (like software developer salaries) is a great thing...the goal is to, as ever, privatise the profit, while socialising expenses.
In civilised countries (including most European countries, the UK, Australia, and even places like Cuba), the government always picks up the bill for hospital and other medical care anyway. Hospice or palliative care is no different.
Because that's what governments are for. looking after the welfare of the people is the *only* thing that justifies their existence, the only thing that makes government tolerable or acceptable to the people.
if your government won't do that, then what the fuck do you put up with it for? you happily accept it paying trillions in corporate welfare but not billions for health care for citizens? you people are just fucked in the head.
You, too can be an owner of capital, of course. Right now, you can own one share of Amazon for just $375.91,
and at the US minimum wage of $7.25/hour, you'd only have to work 51.84 hours in order to own that one share (not including brokerage fees, or any survival requirements like food, shelter, transport to/from work, paying bills etc. also ignoring the fact that you likely couldn't buy a single share of amazon or anything else).
see, *anyone* can benefit from capitalism!!!! yay! the system works!!!
you too can own an insignificantly tiny chunk of a mega-corporation and start identifying with the capitalist owner classes. don't forget to vote for pollies promising to lower taxes and eliminate regulation (as if there's any other choice on offer, haha) while slashing social programs that might help you survive.
woops! last quarter's profits were less than expected, so your $375 share is now worth only $350. And Amazon's management have decided to earn their multi-million dollar bonuses by artificially boosting the next quarter's figures by sacking you and thousands of other peons. But look on the bright side, you have a a whole share of amazon all to yourself, that's now worth only slightly less than you paid for it, and it'll probably recover to $370 or even more soon. hooray!
or maybe their protests and hand-wringing and emphatically blogged thoughts are just business as usual - corporations routinely pay spin doctors to advise them on what to do and how to manipulate opinion whenever they get caught doing stuff they're not supposed to.
to their way of thinking reality is nothing, perception is everything.
too bad the site doesn't work properly - for example, click on an article, you'll get the article page and a dozen or so comments plus a "load more comments" button. clicking that button returns you to the index page.
the current slashdot site works just fine with noscript. beta.slashdot does not. fuck that shit, slashdot's stories and comments just aren't worth the risk of letting them and their corportate parents and their advertisers and whoever else run arbitrary code on my computer.
if slashdot becomes just another site that requires javascript for basic functionality then it'll be just another site that I ignore.
saying that government is inherently inefficient is as monstrously nonsensical as saying that all women are illogical and think only of shoes and shopping.
i.e. it's a stupid lie that only prejudiced fuckwits believe.
that's an incredibly lame pseudo-linguistic argument. did they teach you that one in sunday school when you were 5?
to be anti-christ, you first have to believe in him. atheists don't.
atheists don't believe in Christ or your god any more than they (or you) believe in Odin or Zeus or Vishnu or any of the millions of other gods and goddesses that humans have created.
atheists just beleive in one (or a few, depending on your take on the christian trinity) less god than you.
He succeeds over his rivals and predecessors because his humanity made him a better leader.
Should I make some joke here about Jesus and his humanity and self-sacrifice?
it wouldn't be a joke. Ender is, and was obviously intended to be, a Christ figure.
but the kind of Christ that bad-tempered, vengeful old testament "christians" would have preferred him to be, without any of that turning the other cheek nonsense. jesus merged with action-man rambo, the wrath of god in person.
which shouldn't be surprising to anyone. apart from Ender's nature being blindlingly obvious, OSC did it again later. Card's second major series - Alvin Maker - was a thinly-veiled pseudo-fantasy/pseudo-bibliography of Mormon founder Joseph Smith.
It's also a peculiarly christian kind of double-think - a "loving god" that loves you so much he'll send you to burn in hell for eternity for breaking some (mostly arbitrary and silly, but some sensible) rules with the free will that he gave you.
No sane person could think that made any kind of sense, but it's a popular viewpoint with some kinds of christians - particularly those who want to still call themselves christians while ignoring the message (things like turn the other cheek, not casting the first stone) and devoting themselves to the vengeful and sadistic version of god described in the old testament, with a choice selection of arbitrary rules from leviticus (e.g. homosexuality is still bad, but eating shellfish or milk & meat together - cheeseburgers are baal-worship - is no longer an abomination).
I always thought that Enders Game was over-rated crap, anyway from the time i first read it back in the 80s. Never could understand why it was so popular.
It's just a little boy's anti-bully revenge fantasy - "i'm gonna be meaner and smarter than you and them you'll be sorry for beating me up. and i'll justify whatever i do to you - even murder - by classifying you as sub-human coz you were mean to me. so there!"
actually, that's probably exactly why it was so popular.
and the rest of the series was just dreary rubbish.
yep. the presence of a rebate offer is, to me, a huge negative. it's a con-job, and an insult (with the implication that i'm stupid enough to fall for it).
i'm far more likely to buy a product without one because i just couldn't be fucked jumping through stupid hoops for a rebate.
if they really want to discount their product, then just fucking discount the product at the point of sale. or allow the retailer to claim the rebate for themselves and pre-emptively pass it on to the customer when they buy the product.
and, just as importantly, i really don't want to give the fuckers my name, address, or other personal details. applying for a rebate is asking for spam.
Cease and Desist orders for violating the terms of service would be more effective than just naming and shaming - although that's useful/satisfying too.
also, accessing computer systems without proper authorisation is a criminal offense, not just a civil liability - so evidence can be handed over to the police for prosecution.
A local newspaper owner runs ads for prostitutes in his magazine.
it might be sleazy, but prostituion is a legal service - there's no reason why it shouldn't be advertised (with restrictions on appropriate style and location of advertising, of course).
presumably, his magazine is for adults and the readers know what it's about?
He also has a site (backpage.com) that has been accused by a local DA of being a conduit for child prostitution.
being accused of child prostitution is not the same thing as being guilty of it. if he's arrested, charged, and found guilty in court, then he should be sent to jail. if not, the accusation shouldn't be used as a stick to beat him with.
the gamer or power-user bought the system, including the SSD, from you. it's up to you to remedy any problem with the system you sold them, not to pass the buck to your supplier.
i.e. YOU swap the dead component out of your stock and deal with the supplier's RMA process yourself.
this is not only the right thing to do ethically (and legally in some countries with decent trade practices / consumer protection legislation, australia for example), it's also good business - your customers will come back because they know you wont screw them around.
otherwise, if they're going to get shafted by your buck-passing, they may as well go to the cheapest retailer - support will be no better or worse.
> [...obamacare....] > And since there's an insurance company in the middle taking out > profit, society as a whole pays more.
well, there's the source of the problem. remove the profit, remove the problem.
socialised health insurance should be not-for-profit.
but obama had a hard enough time getting this abomination of a pseudo-socialised health care system through congresss, even leaving room for the parasites to keep their snouts in the trough. if he had tried cutting them out of the loop, he would have had no hope - and if it ever looked like there was the remotest chance of success, he would have been assassinated.
Slashdot Mirror
good post, except for three details:
1. if you're using ZFS on both systems, you're *much* better off using 'zfs send' and 'zfs recv' than rsync.
do the initial full copy, and from then you can just send the incremental snapshot differences from then on.
one advantage of zfs send over rsync is that rsync has to check each file for changes (either file timestamp or block checksum or both) every time you rsync a filesystem or directory tree. With and incremental 'zfs send', it only sends the incremental difference between the last snapshot sent and the current snapshot.
you've also got the full zfs snapshot history on the remote copy as well as on the local copy.
(and, like rsync, you can still run the copy over ssh so that the transfer is encrypted over the network)
2. your price estimates seem very expensive. with just a little smart shopping, it wouldn't be hard to do what you're suggesting for less than half your estimate.
3. if you've got a choice between hardware raid and ZFS then choose ZFS. Even if you've already spent the money on an expensive hardware raid controller, just use it as JBOD and let ZFS handle the raid function.
> Just don't let ZFS know that there's more than 1 drive.
That is *precisely* the wrong thing to do. As in, the exact opposite of how you should do it.
Instead, configure the RAID card to be JBOD and let ZFS handle the multiple-drive redundancy (raidz and/or mirroring), as well as the error detection and correction.
Otherwise, there is little or no benefit in using ZFS. ZFS can't correct many problems if it doesn't have direct control over the individual disks, and RAID simply can't do the things that ZFS can do.
Of course, this means that you're actually better off with a cheap dumb non-raid HBA card (or even just the SATA ports on your motherboard if there's enough of them) than an expensive HW RAID card. This is another advantage of ZFS.
(a good option is to use an LSI SAS2008 card or similar, and make sure it's re-flashed to "IT" mode firmware if you're using consumer-grade SATA drives with it to avoid TLER issues. readily available brand new for under $100 for 8 SAS/SATA ports)
> You can't have them both trying to manage the redundant storage.
yes. and it's ZFS that should be managing it, not the raid card.
> ZFS certainly isn't necessary though, if you've got hardware raid.
wrong. RAID does not provide error detection or correction. RAID protects against drive failures only, not silent corruption.
true, but you do need multiple disks (mirrored or raidz) to protect against drive failure.
two or more copies of your data on the one disk won't help at all if that disk dies.
fortunately, zfs can give you both raid-like multiple disk storage (mirroring and/or raidz) as well as errror detection and correction.
That ZFS_data_integrity link in the post you were replying to gives a pretty good summary of how it works.
The paragraphs immediately above that (titled 'Data integrity', 'Error rates in hard disks', and 'Silent data corruption') also give a good summary of why error-correcting filesystems like ZFS (and btrfs) are necessary, especially with the huge sizes of modern drives.
In fact, anyone interested should read the entire wikipedia article.
ps: neither raid nor ZFS is a substitute for backups. you still need backups of your data (preferably with off-site copies) to protect against accidental deletion or overwrite (snapshots can help with this if used intelligently prior to the event) or burglary or catastrophic damage like fire or flood.
expect to see a lot more of these "See, privacy invasion is good for you" articles. Their purpose is to "prove" that all this spying and data collection helps catch some very naughty people in icky foreign countries. some of them with really bad accents or even terrible mustaches (aka "proof of evil").
of course.
and the MBA mind thinks of GPL software like so: "we got it for free, so we should be able to mark it up and sell it for a squillion dollars...and lock it up so we've got a monopoly".
that's why they love the BSD license, and why there's so much corporate propaganda promoting BSD.
(there's nothing wrong with the BSD license. it's just easily exploitable - by design - by MBA arsehole types)
The BSD license is perfect for MBA types who think that externalising expenses (like software developer salaries) is a great thing...the goal is to, as ever, privatise the profit, while socialising expenses.
In civilised countries (including most European countries, the UK, Australia, and even places like Cuba), the government always picks up the bill for hospital and other medical care anyway. Hospice or palliative care is no different.
Because that's what governments are for. looking after the welfare of the people is the *only* thing that justifies their existence, the only thing that makes government tolerable or acceptable to the people.
if your government won't do that, then what the fuck do you put up with it for? you happily accept it paying trillions in corporate welfare but not billions for health care for citizens? you people are just fucked in the head.
and at the US minimum wage of $7.25/hour, you'd only have to work 51.84 hours in order to own that one share (not including brokerage fees, or any survival requirements like food, shelter, transport to/from work, paying bills etc. also ignoring the fact that you likely couldn't buy a single share of amazon or anything else).
see, *anyone* can benefit from capitalism!!!! yay! the system works!!!
you too can own an insignificantly tiny chunk of a mega-corporation and start identifying with the capitalist owner classes. don't forget to vote for pollies promising to lower taxes and eliminate regulation (as if there's any other choice on offer, haha) while slashing social programs that might help you survive.
woops! last quarter's profits were less than expected, so your $375 share is now worth only $350. And Amazon's management have decided to earn their multi-million dollar bonuses by artificially boosting the next quarter's figures by sacking you and thousands of other peons. But look on the bright side, you have a a whole share of amazon all to yourself, that's now worth only slightly less than you paid for it, and it'll probably recover to $370 or even more soon. hooray!
or maybe their protests and hand-wringing and emphatically blogged thoughts are just business as usual - corporations routinely pay spin doctors to advise them on what to do and how to manipulate opinion whenever they get caught doing stuff they're not supposed to.
to their way of thinking reality is nothing, perception is everything.
too bad the site doesn't work properly - for example, click on an article, you'll get the article page and a dozen or so comments plus a "load more comments" button. clicking that button returns you to the index page.
the current slashdot site works just fine with noscript. beta.slashdot does not. fuck that shit, slashdot's stories and comments just aren't worth the risk of letting them and their corportate parents and their advertisers and whoever else run arbitrary code on my computer.
if slashdot becomes just another site that requires javascript for basic functionality then it'll be just another site that I ignore.
saying that government is inherently inefficient is as monstrously nonsensical as saying that all women are illogical and think only of shoes and shopping.
i.e. it's a stupid lie that only prejudiced fuckwits believe.
you fool! don't let facts get in the way of your enjoyment of a good crypto-racist joke.
that's an incredibly lame pseudo-linguistic argument. did they teach you that one in sunday school when you were 5?
to be anti-christ, you first have to believe in him. atheists don't.
atheists don't believe in Christ or your god any more than they (or you) believe in Odin or Zeus or Vishnu or any of the millions of other gods and goddesses that humans have created.
atheists just beleive in one (or a few, depending on your take on the christian trinity) less god than you.
it wouldn't be a joke. Ender is, and was obviously intended to be, a Christ figure.
but the kind of Christ that bad-tempered, vengeful old testament "christians" would have preferred him to be, without any of that turning the other cheek nonsense. jesus merged with action-man rambo, the wrath of god in person.
which shouldn't be surprising to anyone. apart from Ender's nature being blindlingly obvious, OSC did it again later. Card's second major series - Alvin Maker - was a thinly-veiled pseudo-fantasy/pseudo-bibliography of Mormon founder Joseph Smith.
It's also a peculiarly christian kind of double-think - a "loving god" that loves you so much he'll send you to burn in hell for eternity for breaking some (mostly arbitrary and silly, but some sensible) rules with the free will that he gave you.
No sane person could think that made any kind of sense, but it's a popular viewpoint with some kinds of christians - particularly those who want to still call themselves christians while ignoring the message (things like turn the other cheek, not casting the first stone) and devoting themselves to the vengeful and sadistic version of god described in the old testament, with a choice selection of arbitrary rules from leviticus (e.g. homosexuality is still bad, but eating shellfish or milk & meat together - cheeseburgers are baal-worship - is no longer an abomination).
I always thought that Enders Game was over-rated crap, anyway from the time i first read it back in the 80s. Never could understand why it was so popular.
It's just a little boy's anti-bully revenge fantasy - "i'm gonna be meaner and smarter than you and them you'll be sorry for beating me up. and i'll justify whatever i do to you - even murder - by classifying you as sub-human coz you were mean to me. so there!"
actually, that's probably exactly why it was so popular.
and the rest of the series was just dreary rubbish.
yep. the presence of a rebate offer is, to me, a huge negative. it's a con-job, and an insult (with the implication that i'm stupid enough to fall for it).
i'm far more likely to buy a product without one because i just couldn't be fucked jumping through stupid hoops for a rebate.
if they really want to discount their product, then just fucking discount the product at the point of sale. or allow the retailer to claim the rebate for themselves and pre-emptively pass it on to the customer when they buy the product.
and, just as importantly, i really don't want to give the fuckers my name, address, or other personal details. applying for a rebate is asking for spam.
Cease and Desist orders for violating the terms of service would be more effective than just naming and shaming - although that's useful/satisfying too.
also, accessing computer systems without proper authorisation is a criminal offense, not just a civil liability - so evidence can be handed over to the police for prosecution.
it might be sleazy, but prostituion is a legal service - there's no reason why it shouldn't be advertised (with restrictions on appropriate style and location of advertising, of course).
presumably, his magazine is for adults and the readers know what it's about?
being accused of child prostitution is not the same thing as being guilty of it. if he's arrested, charged, and found guilty in court, then he should be sent to jail. if not, the accusation shouldn't be used as a stick to beat him with.
gnome also now depends on systemd.
that's reason enough for me to finally purge gnome from my systems.
> all the major desktops are going wayland.
that's true - if you consider gnome to be the only major desktop. therefore 100% of "major desktops" are switching to wayland.
the gamer or power-user bought the system, including the SSD, from you. it's up to you to remedy any problem with the system you sold them, not to pass the buck to your supplier.
i.e. YOU swap the dead component out of your stock and deal with the supplier's RMA process yourself.
this is not only the right thing to do ethically (and legally in some countries with decent trade practices / consumer protection legislation, australia for example), it's also good business - your customers will come back because they know you wont screw them around.
otherwise, if they're going to get shafted by your buck-passing, they may as well go to the cheapest retailer - support will be no better or worse.
> [...obamacare....]
> And since there's an insurance company in the middle taking out
> profit, society as a whole pays more.
well, there's the source of the problem. remove the profit, remove the problem.
socialised health insurance should be not-for-profit.
but obama had a hard enough time getting this abomination of a pseudo-socialised health care system through congresss, even leaving room for the parasites to keep their snouts in the trough. if he had tried cutting them out of the loop, he would have had no hope - and if it ever looked like there was the remotest chance of success, he would have been assassinated.
they just have no idea.
only vegetarians know the excitement and accomplishment of hunting the wily pumpkin.
1. get back in to Fortran - especially if you'll be working with other researchers on existing code.
2. python, with the scipy and numpy libraries.
yeah, the first half of them were advertising and self-serving propaganda too.
whistleblowing is not the same thing as hacking into a dead girl's phone.