In other words, what you learn in CS is fundamental to all technology forever. I recently read that technological knowledge usefulness has a half-life of about 5 years and shrinking. Learning technology is almost useless with the increasingly fast paced evolution of technology. Best to focus on the fundamentals which are eternally true.
In my personal experience, high latency for user interactive IO, like opening a file, can be jarring and dramatically reduce my work throughput. I can lose my train of thought if the interactivity is not fluid. It really depends on the context.
90% of what we do is sub-conscious and our prefrontal cortexes will make up a rational story for what we do.
That only applies when you blindly do what you feel like. When I reflect on what I have done, if I did something I didn't like, I analyze why I did something. Once I've locked down on the rational, I can change it, and I won't do it again next time. I used to be easily agitated, but the only thing more annoying that someone bothering me is letting myself be bothered by someone. Once I figure out why something or someone bothers me, I can make the issue not bother me.
The first time I observe a given annoyance, I seemingly have little control over it, it's only once I've reflected on it that I can control myself. An example of this is when I was younger, the sound of a crying baby drove me up the wall. After getting flustered many times, I thought about why I felt that way. I eventually realized that it's because I had no control over them crying, but I wanted to help them to make them stop, but many times trying to help was futile. Once I realized that it was my failing attempts that bothered me and not so much the crying, the next day I was suddenly unbothered by children crying. Assuming it's not a hunger or pain cry.
90% of what I do may be my subconscious, but I can control my subconscious, just not in real-time. I need time to reflect and a sleep-cycle.
It is very possible that what we see as random, the Universe sees as deterministic at a higher dimension that we might possibly never be able to find. And quantum is not truly random. It has biases that cause emergent properties in stuff all around us. It's only random when we try to measure it.
The Moon has something like 6x the rare Earth metal concentration of the Earth. That's almost a magnitude better, and no environmental issues to worry about.
BSD Jails do not use anything like chroot. "chroot" is being used as a verb that described the intention, but not the implementation.
This is how the FreeBSD kernel devs describe BSD Jails. Each jail get's it's own kernel network stack, kernel memory allocator, and almost every other kernel datastructure. They said this is nearly identical to paravirtualization. Breaking out of a jail requires a kernel flaw in both a system call and the paravirtualization layer.
Think KVM+QEMU, with most of the benefit and virtually no overhead from a performance standpoint. Of course you can't run just any kernel, only the host kernel, but that's why it's so low overhead. If you do need another kernel, they have some basic Linux kernel emulation that can wrap BSD system calls in a jail to mimic Linux. Not perfect, but 80/20. If you need a full on VM, you can use the 1,300 LOC large(this is small. fewer lines, fewer bugs) hybrid type 1+2 VM, bhyve.
A cool thing you can do with jails+ZFS is create a snapshot that you clone for your compilation. Some company that does a lot of compiling, integration tests, and other things, has a basic ZFS snapshot that they clone, then spin up a jail, clone their target source code, feed that ZFS clone into the jail, then compile, test, etc. Once everything is done, they have the jail write out the binaries to a shared location, shutdown the jail, and delete the ZFS volume. During a large compilation, they are creating and destroying about 10,000 jails+snapshots per second, and at 95% the speed of compiling and testing directly on the host, but a lot easier to manage.
The way PC-BSD 11 upgrades your system is it snapshots your boot volume, loads a jail, boots PC-BSD within the jail, runs the upgrade, then points your next reboot at the upgraded volume. And yes, you can not only snapshot your entire FreeBSD system and boot it in a jail, but you can actually boot your host system from a jail's volume. This also means you can keep around old snapshots of your host OS, and "boot them" in a jail. This doesn't entirely apply to kernel updates. Because jails are just copies of the host kernel, you only have one kernel running at a time. But ZFS is bootable, so your snapshots do include the old kernels. If you need to boot an old kernel snapshot, you can just as easily boot that volume in bhyve.
The difference is BSD Jails are entirely separate environments with their own unshared kernel datastructures, and the jail communicates with the host via an API. Linux namespaces is just metadata added to shared environments. Not only is it reduced isolation, allowing for some annoying "leaking", but is more bug prone from increased complexity, and the shared datastructures are naturally more prone to major issues then they arise.
Security can't be bolted on after the fact, it must be baked into the design.
ZFS too resource heavy? Yeah, don't run it on a cell phone. BTRFS balancing seems to have some major issues. I'm not sure if it's fundamental or not, but they're old issues and haven't been fixed for many years.
The difference between rsync and ZFS is O(N) and O(1). That is the worst case, but ZFS can instantly find the difference between datasets of any size, while rsync has to scan them first. Try rsyncing petabytes of files where many files are constantly being touched, but few changes being made.
Depends on what you're calling "containers". BSD Jails have been around for a long time, but what Linux calls "containers" are crappy attempts to containerize. The Linux community has this unhealthy "not invented here" syndrome that results in a lot of square wheels.
Since something like 99.99% of bacteria is harmless to humans and this bacteria predates humans, he just wanted to see how quickly his immune system would destroy it.
Low population growth typically indicates an educated populace, low infant mortality, and a high cost to rear children because of a high cost of living caused by a luxury economy.
That's not the point. The point is your ISP and their peering links should NEVER be the bottleneck. Heck, my ISP guarantees a congestion free experience and they use Level 3, which also guarantees congestion free. I get my full speed to every datacenter in the world, at least of the ones I've cared to test in nearly every major city.
What kind of uptime do you have on FF? Whenever I use FF, with no addons, and never close it, after a month, it uses more memory than Chrome. At least Chrome frees up its memory as your close the windows./myexperience
A bootable OS is an entire package. Whomever made the OS inherently trusts and takes responsibility. If the Linux community at large uses GRUB2, then the Linux community is responsible. I hate the whole "shift the blame game". If my code uses a 3rd-party library, if my code breaks because of the 3rd-party lib, who is to blame? ME! I chose to use the lib, so I am responsible to make sure the lib works, because my code depends on it working.
The boot information should be encrypted with the password. That way if the password is wrong and there's a bug in the validation, the attacker will won't be able to read the current information.
I have a dedicated 100/100 fiber connection for $90/m, and my ISP uses Level 3 directly to Chicago for all of their traffic. I asked my ISP about getting a Netflix CDN and they said they have plenty of bandwidth and refuse to co-lo Netflix' CDN service because it would be unfair to favor Netflix over others. 0.0001% monthly packet loss(which includes the random 2am maintenance downtimes) and 1ms stddev of jitter to 8.8.8.8 and 8.8.4.4. Even looking at my PFSense quality graph, the pings to my ISP never go above 2ms+-0.1ms. Freenet and Torrent running 24/7. About 6TiB/month. Wife lets Hulu run all day on auto-play. We fall asleep to Netflix at night.
I was on IRC when I was about 9 years old. The internet was so new, my parents didn't know anything about it. Even at the young age, I knew not to give out any personal information.
Slashdot Mirror
Even of the decent programmers, how many can actually teach? Many people good at their job are not good at teaching.
In other words, what you learn in CS is fundamental to all technology forever. I recently read that technological knowledge usefulness has a half-life of about 5 years and shrinking. Learning technology is almost useless with the increasingly fast paced evolution of technology. Best to focus on the fundamentals which are eternally true.
In my personal experience, high latency for user interactive IO, like opening a file, can be jarring and dramatically reduce my work throughput. I can lose my train of thought if the interactivity is not fluid. It really depends on the context.
HAMMER fs on a HAMR HD. Now it's HAMR time!
90% of what we do is sub-conscious and our prefrontal cortexes will make up a rational story for what we do.
That only applies when you blindly do what you feel like. When I reflect on what I have done, if I did something I didn't like, I analyze why I did something. Once I've locked down on the rational, I can change it, and I won't do it again next time. I used to be easily agitated, but the only thing more annoying that someone bothering me is letting myself be bothered by someone. Once I figure out why something or someone bothers me, I can make the issue not bother me.
The first time I observe a given annoyance, I seemingly have little control over it, it's only once I've reflected on it that I can control myself. An example of this is when I was younger, the sound of a crying baby drove me up the wall. After getting flustered many times, I thought about why I felt that way. I eventually realized that it's because I had no control over them crying, but I wanted to help them to make them stop, but many times trying to help was futile. Once I realized that it was my failing attempts that bothered me and not so much the crying, the next day I was suddenly unbothered by children crying. Assuming it's not a hunger or pain cry.
90% of what I do may be my subconscious, but I can control my subconscious, just not in real-time. I need time to reflect and a sleep-cycle.
It is very possible that what we see as random, the Universe sees as deterministic at a higher dimension that we might possibly never be able to find. And quantum is not truly random. It has biases that cause emergent properties in stuff all around us. It's only random when we try to measure it.
The Moon has something like 6x the rare Earth metal concentration of the Earth. That's almost a magnitude better, and no environmental issues to worry about.
BSD Jails do not use anything like chroot. "chroot" is being used as a verb that described the intention, but not the implementation.
This is how the FreeBSD kernel devs describe BSD Jails. Each jail get's it's own kernel network stack, kernel memory allocator, and almost every other kernel datastructure. They said this is nearly identical to paravirtualization. Breaking out of a jail requires a kernel flaw in both a system call and the paravirtualization layer.
Think KVM+QEMU, with most of the benefit and virtually no overhead from a performance standpoint. Of course you can't run just any kernel, only the host kernel, but that's why it's so low overhead. If you do need another kernel, they have some basic Linux kernel emulation that can wrap BSD system calls in a jail to mimic Linux. Not perfect, but 80/20. If you need a full on VM, you can use the 1,300 LOC large(this is small. fewer lines, fewer bugs) hybrid type 1+2 VM, bhyve.
A cool thing you can do with jails+ZFS is create a snapshot that you clone for your compilation. Some company that does a lot of compiling, integration tests, and other things, has a basic ZFS snapshot that they clone, then spin up a jail, clone their target source code, feed that ZFS clone into the jail, then compile, test, etc. Once everything is done, they have the jail write out the binaries to a shared location, shutdown the jail, and delete the ZFS volume. During a large compilation, they are creating and destroying about 10,000 jails+snapshots per second, and at 95% the speed of compiling and testing directly on the host, but a lot easier to manage.
The way PC-BSD 11 upgrades your system is it snapshots your boot volume, loads a jail, boots PC-BSD within the jail, runs the upgrade, then points your next reboot at the upgraded volume. And yes, you can not only snapshot your entire FreeBSD system and boot it in a jail, but you can actually boot your host system from a jail's volume. This also means you can keep around old snapshots of your host OS, and "boot them" in a jail. This doesn't entirely apply to kernel updates. Because jails are just copies of the host kernel, you only have one kernel running at a time. But ZFS is bootable, so your snapshots do include the old kernels. If you need to boot an old kernel snapshot, you can just as easily boot that volume in bhyve.
The difference is BSD Jails are entirely separate environments with their own unshared kernel datastructures, and the jail communicates with the host via an API. Linux namespaces is just metadata added to shared environments. Not only is it reduced isolation, allowing for some annoying "leaking", but is more bug prone from increased complexity, and the shared datastructures are naturally more prone to major issues then they arise.
Security can't be bolted on after the fact, it must be baked into the design.
ZFS is nice .. but it's just not been stable
By your definition of stable, nothing is stable. ZFS is not perfect, but it is closer to perfect than anything else.
ZFS too resource heavy? Yeah, don't run it on a cell phone. BTRFS balancing seems to have some major issues. I'm not sure if it's fundamental or not, but they're old issues and haven't been fixed for many years.
+9001 Funny! I needed that. BTRFS, the FS designed by devs for cool new features!. ZFS, the FS designed by sysadmins for sysadmins.
The difference between rsync and ZFS is O(N) and O(1). That is the worst case, but ZFS can instantly find the difference between datasets of any size, while rsync has to scan them first. Try rsyncing petabytes of files where many files are constantly being touched, but few changes being made.
Depends on what you're calling "containers". BSD Jails have been around for a long time, but what Linux calls "containers" are crappy attempts to containerize. The Linux community has this unhealthy "not invented here" syndrome that results in a lot of square wheels.
Since something like 99.99% of bacteria is harmless to humans and this bacteria predates humans, he just wanted to see how quickly his immune system would destroy it.
Low population growth typically indicates an educated populace, low infant mortality, and a high cost to rear children because of a high cost of living caused by a luxury economy.
That's not the point. The point is your ISP and their peering links should NEVER be the bottleneck. Heck, my ISP guarantees a congestion free experience and they use Level 3, which also guarantees congestion free. I get my full speed to every datacenter in the world, at least of the ones I've cared to test in nearly every major city.
Both of these products require NPAPI to function.
Some applications require IE5 to work. Your point?
What kind of uptime do you have on FF? Whenever I use FF, with no addons, and never close it, after a month, it uses more memory than Chrome. At least Chrome frees up its memory as your close the windows. /myexperience
Chrome has Session Buddy. I only just found it. https://chrome.google.com/webs...
Even better is you may need a Google account just to activate your smart phone, where the primary user is under 16.
A bootable OS is an entire package. Whomever made the OS inherently trusts and takes responsibility. If the Linux community at large uses GRUB2, then the Linux community is responsible. I hate the whole "shift the blame game". If my code uses a 3rd-party library, if my code breaks because of the 3rd-party lib, who is to blame? ME! I chose to use the lib, so I am responsible to make sure the lib works, because my code depends on it working.
The boot information should be encrypted with the password. That way if the password is wrong and there's a bug in the validation, the attacker will won't be able to read the current information.
I have a dedicated 100/100 fiber connection for $90/m, and my ISP uses Level 3 directly to Chicago for all of their traffic. I asked my ISP about getting a Netflix CDN and they said they have plenty of bandwidth and refuse to co-lo Netflix' CDN service because it would be unfair to favor Netflix over others. 0.0001% monthly packet loss(which includes the random 2am maintenance downtimes) and 1ms stddev of jitter to 8.8.8.8 and 8.8.4.4. Even looking at my PFSense quality graph, the pings to my ISP never go above 2ms+-0.1ms. Freenet and Torrent running 24/7. About 6TiB/month. Wife lets Hulu run all day on auto-play. We fall asleep to Netflix at night.
I was on IRC when I was about 9 years old. The internet was so new, my parents didn't know anything about it. Even at the young age, I knew not to give out any personal information.