Hum, I would disagree. I personally think that IBM's GPFS is the least likely to lose data. Heck it is the *ONLY* file system I have seen that keeps trucking when loosing a disk making it up. Sure the files on that disk are no longer available but all the rest are.
That's special relativity. General Relativity extended this to *ALL* frames of reference.
Of course, looking at all possible frames of reference, the earth goes around the sun in a much much higher percentage than the other way around. Therefore one can still argue that the earth does indeed go around the sun.
A ARM Cortex A9 dual core clocked at 1GHz, that is a top of the line ARM, would run rings around any Atom while consuming a fraction of the power.
The trick is that the ARM instruction set is *WAY* more efficient than the x86. The fact that the current ARM's are basically in order units is less important due to the design of the instruction set.
You are right about the power though. The ARM needs to be coupled to a low power chipset, but guess what these also exist as well.
It also needs a low power display. Now if I could just get a netbook with an Cortex A9 a GB of RAM, with 8-16GB of flash and a LCD from a OLPC XO-1 for 200 USD I would be well chuffed. I would expect such a netbook to have around 10-12 hours battery life.
Remember Motif/OpenLook wars? Probably not. These young ones today...
For many years Sun resisted Motif tooth and nail with their OpenLook/XView stuff. The Sun desktop of old looked nothing like CDE. That was along with Motif an Open Software Foundation product.
So please explain to me what you do when you want to migrate that 50TB file system to new disks (because the old ones are out of support say) with no or minimal downtime?
Just explain how you remove a disk from a ZFS filesystem?
Or perhaps how you set a quota?
Or perhaps how you do HSM?
Or perhaps how you run it in a cluster environment?
You see the thing is it does none of the above. ZFS seems to have a lot of fan boys who just don't do the real world high availability file serving if you ask me. ZFS currently lacks a lot or required real world features that I professionally use on a near daily basis.
ZFS is production ready my ass. ZFS will be production ready when I can take a disk out the filesystem, when I can set quota's when it supports HSM and when it supports clustering.
Finally it will be production ready when it has a decade of hardening in the real world.
In the meantime both JFS and XFS offer better alternatives, and for me only GPFS (which admittedly is closed source but does run under Linux) ticks all the boxes.
The crazy thing is that ext4 offers nothing that we don't get with XFS or JFS, and if RedHat would stop pussy footing about, and support either one (and I don't care which) the whole ext? could die.
The ext2/3 line had a place and a time, and that place and time has long gone. It needs to die...
Do you trust your data to a >15 year old file system with a proven track record or some new kid on the block with none?
Also get back to me when ZFS does clustering, quotas and HSM. In the mean time I will stick to GPFS, which beats the shit out of ZFS without breaking sweat.
A top of the line ARM i.e. a Cortex A9 (thats a dual core 1GHz ARM) would whip the pants of *ANY* Intel Atom, while consuming a fraction of the power.
The big mistake in the design on the XO-1 is that they used an power hungry AMD Geode. Had they used an ARM the battery life would have been remarkable, the laptop would have had more CPU grunt and it would have had no impact on their software platform as it is all open source anyway.
Perhaps you might like to take a trip to Cragside, the home of Lord Armstrong in Northumberland. To quote from the Wikipedia article
In 1870, water from one of the estate's lakes was used to drive a Siemens dynamo in what was the world's first hydroelectric power station. The resultant electricity was used to power an arc lamp installed in the Gallery in 1878. The arc lamp was replaced in 1880 by Joseph Swan's incandescent lamps in what Swan considered 'the first proper installation' of electric lighting.
Never heard of the Russian angle but Swan in the U.K. invented one at the same time as Edison. Big patent battle, ended up joining forces and cornering the market.
How the hell do you copyright tide tables? All I need to do is turn up one day, wait till high tide, note the time and date. After that it is a simple matter to calculated the tide times in advance. Heck you can by clocks for it.
But this is codified law. The information is Crown Copyright. It's the same here in the United Kingdom where the Crown Copyright originates. The name is something of a giveaway, Crown Copyright means that the copyright is held by the Crown, which is the legally the state. Remember that parliament sits at the invitation of the Crown aka our (thats yours and mine) Queen.
As for you head of state, yours comes almost free, cause we get to pay for it back in old Blighty. You only have to pay if she decides to pay you a visit, which is not that often. Why anyone would want to get rid of such a free meal ticket always amazes me.
Well I have. Three years ago I caught a whole series (well four to be precise) of trains from Zurich Airport to Andermatt. They where all within one minute of the scheduled arrival and departure time, and the spoke German.
I then caught some trains later in the week from Andermatt to Disentis, and that is over a high alpine pass with *lots* of snow, well over two metres fell that week. They where also on time.
The 3D is licensed from PowerVR, aka Imagination Technologies which used to be called Videologic for those with long memories.
It has nothing to do with Intel (other than that they licensed it), and historically Videologic, when they where in the PC graphics card business where tight lipped about their stuff, rather like nVidia are.
Which all sorts of sucks because the chipset does pretty good 3D for virtually no power. Which should finally mean some netbooks with decent battery lives.
Wrong, the person taking the recording owns the copyright on the recording they do not own the copyright on the contents of that recording. That still belongs to the teacher/professor/school/college etc.
You clearly have a poor understanding of copyright law.
Think of it like talking books. If I make a talking book of Great Expectations, then I own the copyright in the recording, but I own no copyright in the contents of the recording, and someone could write it all down and disseminate it to who ever they pleased, and I could do nothing about it. In the meantime I can control who does what with my recording.
On the other hand if I make a talking book of Harry Potter, while I own the copyright in the recording, I do *NOT* own the copyright in the contents. That still belongs to JK Rowling, and she can dictate that I do not disseminate my recording, because doing so would break her copyright in the contents of the recording.
A recording of a lecture is like a talking book of a book that is still in copyright.
Take LVM snapshots and do periodic background fsck's, if they pass reset the last check time. If they fail set it to some time in the distance past and raise an alert.
However I have to agree, my biggest beef with Redhat is their boneheaded sticking with ext3, and the utter waste of effort that is ext4. It would be far more sensible to have picked either JFS or XFS (I don't care which) and used that instead.
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Hum, I would disagree. I personally think that IBM's GPFS is the least likely to lose data. Heck it is the *ONLY* file system I have seen that keeps trucking when loosing a disk making it up. Sure the files on that disk are no longer available but all the rest are.
That's special relativity. General Relativity extended this to *ALL* frames of reference.
Of course, looking at all possible frames of reference, the earth goes around the sun in a much much higher percentage than the other way around. Therefore one can still argue that the earth does indeed go around the sun.
A ARM Cortex A9 dual core clocked at 1GHz, that is a top of the line ARM, would run rings around any Atom while consuming a fraction of the power.
The trick is that the ARM instruction set is *WAY* more efficient than the x86. The fact that the current ARM's are basically in order units is less important due to the design of the instruction set.
You are right about the power though. The ARM needs to be coupled to a low power chipset, but guess what these also exist as well.
It also needs a low power display. Now if I could just get a netbook with an Cortex A9 a GB of RAM, with 8-16GB of flash and a LCD from a OLPC XO-1 for 200 USD I would be well chuffed. I would expect such a netbook to have around 10-12 hours battery life.
None what so ever.
Remember Motif/OpenLook wars? Probably not. These young ones today...
For many years Sun resisted Motif tooth and nail with their OpenLook/XView stuff. The Sun desktop of old looked nothing like CDE. That was along with Motif an Open Software Foundation product.
See the wikipedia page for infoOpenLook
But you can't remove a disk from a file system.
So please explain to me what you do when you want to migrate that 50TB file system to new disks (because the old ones are out of support say) with no or minimal downtime?
Just explain how you remove a disk from a ZFS filesystem?
Or perhaps how you set a quota?
Or perhaps how you do HSM?
Or perhaps how you run it in a cluster environment?
You see the thing is it does none of the above. ZFS seems to have a lot of fan boys who just don't do the real world high availability file serving if you ask me. ZFS currently lacks a lot or required real world features that I professionally use on a near daily basis.
ZFS is production ready my ass. ZFS will be production ready when I can take a disk out the filesystem, when I can set quota's when it supports HSM and when it supports clustering.
Finally it will be production ready when it has a decade of hardening in the real world.
In the meantime both JFS and XFS offer better alternatives, and for me only GPFS (which admittedly is closed source but does run under Linux) ticks all the boxes.
The crazy thing is that ext4 offers nothing that we don't get with XFS or JFS, and if RedHat would stop pussy footing about, and support either one (and I don't care which) the whole ext? could die.
The ext2/3 line had a place and a time, and that place and time has long gone. It needs to die...
And IBM's GPFS pisses over both GFS and OCFS from orbit.
Add to that, IBM has GPFS which does all of the above, plus clustering, and HSM and why would you bother with ZFS.
You need to add Samba to that list. Who do you think is doing all the ctdb work, and who do they work for.
What is it with ZFS fan boys???
Do you trust your data to a >15 year old file system with a proven track record or some new kid on the block with none?
Also get back to me when ZFS does clustering, quotas and HSM. In the mean time I will stick to GPFS, which beats the shit out of ZFS without breaking sweat.
Why would IBM be interested in ZFS when they have GPFS. Is ZFS clustered? Does ZFS support quotas? Does ZFS support HSM?
ZFS is like Apple has a lot of fanboys out there, but in a rational analysis there are much better products available.
Indeed one is a real database, and the other is a toy.
I cannot imagine for one minute that IBM are remotely interested in MySQL, when they have DB2.
As for office suite, they had and let die probably the best word processor on Windows, Ami Pro.
So use NTFS then... There is a perfectly good NTFS read/write driver for Linux these days...
Alternatively just use 8.3 filenames.
A top of the line ARM i.e. a Cortex A9 (thats a dual core 1GHz ARM) would whip the pants of *ANY* Intel Atom, while consuming a fraction of the power.
The big mistake in the design on the XO-1 is that they used an power hungry AMD Geode. Had they used an ARM the battery life would have been remarkable, the laptop would have had more CPU grunt and it would have had no impact on their software platform as it is all open source anyway.
Perhaps you might like to take a trip to Cragside, the home of Lord Armstrong in Northumberland. To quote from the Wikipedia article
In 1870, water from one of the estate's lakes was used to drive a Siemens dynamo in what was the world's first hydroelectric power station. The resultant electricity was used to power an arc lamp installed in the Gallery in 1878. The arc lamp was replaced in 1880 by Joseph Swan's incandescent lamps in what Swan considered 'the first proper installation' of electric lighting.
Never heard of the Russian angle but Swan in the U.K. invented one at the same time as Edison. Big patent battle, ended up joining forces and cornering the market.
How the hell do you copyright tide tables? All I need to do is turn up one day, wait till high tide, note the time and date. After that it is a simple matter to calculated the tide times in advance. Heck you can by clocks for it.
But this is codified law. The information is Crown Copyright. It's the same here in the United Kingdom where the Crown Copyright originates. The name is something of a giveaway, Crown Copyright means that the copyright is held by the Crown, which is the legally the state. Remember that parliament sits at the invitation of the Crown aka our (thats yours and mine) Queen.
As for you head of state, yours comes almost free, cause we get to pay for it back in old Blighty. You only have to pay if she decides to pay you a visit, which is not that often. Why anyone would want to get rid of such a free meal ticket always amazes me.
Well I have. Three years ago I caught a whole series (well four to be precise) of trains from Zurich Airport to Andermatt. They where all within one minute of the scheduled arrival and departure time, and the spoke German.
I then caught some trains later in the week from Andermatt to Disentis, and that is over a high alpine pass with *lots* of snow, well over two metres fell that week. They where also on time.
The 3D is licensed from PowerVR, aka Imagination Technologies which used to be called Videologic for those with long memories.
It has nothing to do with Intel (other than that they licensed it), and historically Videologic, when they where in the PC graphics card business where tight lipped about their stuff, rather like nVidia are.
Which all sorts of sucks because the chipset does pretty good 3D for virtually no power. Which should finally mean some netbooks with decent battery lives.
Sparse files have existing since forever.
Wrong, the person taking the recording owns the copyright on the recording they do not own the copyright on the contents of that recording. That still belongs to the teacher/professor/school/college etc.
You clearly have a poor understanding of copyright law.
Think of it like talking books. If I make a talking book of Great Expectations, then I own the copyright in the recording, but I own no copyright in the contents of the recording, and someone could write it all down and disseminate it to who ever they pleased, and I could do nothing about it. In the meantime I can control who does what with my recording.
On the other hand if I make a talking book of Harry Potter, while I own the copyright in the recording, I do *NOT* own the copyright in the contents. That still belongs to JK Rowling, and she can dictate that I do not disseminate my recording, because doing so would break her copyright in the contents of the recording.
A recording of a lecture is like a talking book of a book that is still in copyright.
Take LVM snapshots and do periodic background fsck's, if they pass reset the last check time. If they fail set it to some time in the distance past and raise an alert.
However I have to agree, my biggest beef with Redhat is their boneheaded sticking with ext3, and the utter waste of effort that is ext4. It would be far more sensible to have picked either JFS or XFS (I don't care which) and used that instead.