"An image from the SEVIRI instrument aboard our Meteosat-10 geostationary satellite. The vapour trail left by the meteor that was seen near Chelyabinsk in Russia on 15th February 2013 is visible in the centre of the image."
1.3. Filesystem barriers enabled by default in Ext3 Hard disks have a memory buffer were they temporally store the instructions and data issued from the OS while the disk processes it. The internal software of modern disks changes the order of the instructions to improve performance, which means that instructions may or may not be committed to the disk in the same order the OS issued them. This breaks many of the assumptions that filesystems need to reliably implement things like journaling or COW, so disks provide a "cache flush" instruction that the OS uses when it needs it. In the Linux world, when a filesystem issues that instruction, it is called a "barrier". Filesystems such as XFS, Btrfs and Ext4 already use and enable barriers by default; Ext3 supports them but until this release it did not enable them by default: while the data safety guarantees are higher, their performance impact in Ext3 is noticeable in many common workloads, and it considered that it was an unnaceptable performance regression to enable them by default. However, Linux distros like Red Hat have enabled barriers by default in Ext3 for a long time, and now the default for mainline has been changed aswell.
In other words: if you use Ext3 and you note performance regressions with this release, try disabling barriers ("barriers=0" mount option).
Yes, you can actually. I got the apple earphones(needed to replace old ones) & mic set from my local mac store and I hooked them up to an ipod touch with the skype app and was able to make calls easily. This was using only 802.11b/g connections that were open where ever I was located. The biggest problem was spotty wifi connectivity and coverage. Also since I ride a motorcycle I was more worried about having access to emergency services, so I didn't go with it as a solution to totally replace my cellphone.
I could see that if it were economical, you could have all calls go to skype & skype-voicemail and talk when you're close to a wifi connection. While also having a prepaid cell phone for emergency calls. I was very close to doing this but since I'm on a family plan and my cell phone is only $10 extra it wouldn't really save me anything to go that route.
We have deep freeze as well here where I work. We have it turn off the pc's at 11pm. It turns them all on at 2:55am unfrozen, windows update runs at 3am (with the auto-install) also symantec anti-virus runs, and at 4am it refreezes the machines and shuts them back down. Wake-on-Lan will need to be setup on the PC's but this system works very well for patching & updating the machines while also keeping them frozen from mal-ware.
Let your IT guys know, it should be that simple... at least as far as freezing & updates.
yeah I was ignoring their printing business and just thinking of their unixes... I had forgotten about the Itanics though... like most of the world !zing!
How does it work for searching though? If I just have my "freespace" file and my pointers to records, does a search for some piece of user requested data have to hit every record or is there a hash somewhere for the data contained in the record? You don't mention it in your description.
It seems that the biggest advantage to a relational DB is that the syntax for accessing it is well known, SQL. It has a human read-able interface and while sometimes whonky to work with for complex operations, it provides the simplest cross-platform way to access data. I don't need to know which data blocks hold the data, I just ask the database for them "SELECT slashdotid, name FROM users where slashdotid 20000"... and I get rows of data.
Could I just read it from a file? Yes. Would it be simpler? Maybe. But what if I have 200001 records, then I have to do some magic sorting in my program, and I have to manage memory for them, and disk space, etc. It is simpler to let the DB handle that mess and I just ask for the data I need.
It breaks up the process of programming into data storage and data manipulation/presentation. DB's for storage, my bad python for manipulation and presentation.
First Black President, that's why this is important. I plan to watch it. This is how far we as a nation have come in the 60 years since the civil rights movement and the Jim Crow laws that held black people down for so long. More than just another president being inaugurated this is a statement that anyone can achieve anything they push for. Yes, I'm a flag waving optimist about this but having grown up in an inner city and having seen the devastation of being poor in America, It makes me hopeful that things can change for the better.
This is the kind of thing that can give an inner city kid a shred of hope that he can get out of the slums and into something better.
I'm starting to get all preachy now, but that's why this is something kids should watch.
I'm going to second that. Wrath is very nicely done. The graphics are visually arresting. The quests aren't just kill six snow moose, it's go kill 10 crazed dwarfs and crack open their skulls to see if their brains are rotten... and I'm all for the skull cracking.
Blizz learned a lot from the BC expansion and definitely made this one better. I am a fan of WoW and have been playing for three years now. I often take breaks from it to play steam games, but no other MMO has offered anything remotely like it in terms of ease of use, that is, it doesn't act like it hates the player. But this is an AoC article so I'll stop being a slavering fan-boy now.
Is Lynn Minmay dead? Please? I hated her and never saw what Rick liked about her. She was trash. Lisa was the hot one, something about a woman in uniform... oh uh yeah, umm I'm not a fanboy...
I'll take your idea and expand it a bit further, why not have people enter books they've read into a DB and rate them. Then you could see books which were "close" to ones you liked but not on your all ready read list. Amazon has this in their "People who liked this book also liked..." but it tends to miss the good books that only a few people have read. Add a feature which reduces rating by age, so that massively popular books, "Enders Game" which aren't "new" don't always show up at the top of the list.
They have dealt with this in ISCs BIND. You can add:
zone "COM" {type delegation-only; }; zone "NET" {type delegation-only; };
to your named.conf file to allow only the "correct" servers to respond.
As far as copyright/patent/trademarking that is the what the Free Software Foundation and the GNU project try to do. MS does this to, AD is part of their process of "embracing and extending" "core internet protocols" (see the Halloween docments). DNS is tightly integrated in AD and it's a pain to untie it... but that's another rant.
Part of the issue with DNS is that it is a centralized system. You have to get your upstream DNS servers from somewhere. In most cases your ISP, as a centralized point for jumping off to the internet, works best for this. The ISP caches all DNS queries and everyone benefits from the cached information. This is repeated backwards at the top level of the DNS system(not really but it works for this explanation) where the DNS servers just tell your DNS server where to find the correct information. For DNS queries this system works best b/c it ensures that even if your system/upstream-DNS/cache doesn't have the answer it can travel up the DNS tree to find out who does have the right answer for a DNS query. In our case here the ISP isn't letting the failed query return to the user, it's sticking it's own ip addresses in as valid responses to the query. Which really means the even with a standard they are intercepting/breaking the normal chain of events. Other than either using your own or others' DNS servers there is not a lot you can do about it unless it is "fixed" by the offending ISP.
Now Just thinking out loud... I'm not convinced we can replace the centralized DNS system, it works well and responds well to failures. Decentralizing it would just return us back to the hosts file problems of the early days of the internet( http://en.wikipedia.org/wiki/Hosts_file ) What would be interesting would be a decentralized DNS cache system. Or a system of shared DNS caches either local or upstream of a user. The problem with this would be rotating through the resolvers designated DNS servers (usually provided by DHCP or hard-coded in/etc/resolv.conf on *nix systems) in case one failed or wasn't responding "fast".
For WoW they have multiple 'realms' running on a single server. That is one of the facilities that has let them make cross-realm battlegrounds. The clients aren't jumping servers, just realms on the same server.
If a client performs an action, that action is sent to the server, the server makes sure it's a valid action, and then sends the result of the action back to the client and to other clients that are "Close" (within X radius, or same zone, continent, whatever). That seems to be the way WoW works. Someone did hack a WoW server together a while ago, but I think it doesn't work with newer clients. So most of the work is done sending messages back and forth to the server, not in actual processing on the server side.
Because the servers are a single point of contact for clients, it makes the process of programming very simple and robust (mostly... ok if you have enough servers and bandwidth) The content on the servers is the same. Moving a character between servers is an out-of-game process b/c the characters only exist on one server at a time.
Hope this answers some of your questions, and yes it is a good idea.
You are forgetting that while iPod/iTunes can play MP3's, AAC, and it's associated DRM, will be required and MP3's will be phased out. Then it will be a fight between your favorite DRM'ed format.
Usefullness/Feature Request...
on
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Hi Slashdot Editors & Mods, I like the idea that tags give a way to codify information based on small words with commonly accepted meanings. My Feature request would be that clicking on a tag didn't edit the tag, but brought up a list of global bookmarks or articles with that tag. So let me click on the 'anime' tag and get a list of people's 'anime' tagged bookmarks. I want the tags to be a search feature. I think this would make the tags even more usefull.
Also, how are "Popular" bookmarks figured out? By the number of people bookmarking the same site, or by the number of people following the link?
It sounds like adrenalin. The adrenalin rush from playing fighting and sports games serves to deaden pain. This is just what it's supposed to do as part of the built-in "Fight or Flight" response. It keeps us going when were dead tired, but still needing to run from lions.
Slashdot Mirror
Nope, that's actually the "Gates of Hell" in Turkmenistan. http://www.atlasobscura.com/places/the-gates-of-hell
http://www.flickr.com/photos/eumetsat/8474853633/
"An image from the SEVIRI instrument aboard our Meteosat-10 geostationary satellite. The vapour trail left by the meteor that was seen near Chelyabinsk in Russia on 15th February 2013 is visible in the centre of the image."
From the Changelog linked to in the article...
1.3. Filesystem barriers enabled by default in Ext3
Hard disks have a memory buffer were they temporally store the instructions and data issued from the OS while the disk processes it. The internal software of modern disks changes the order of the instructions to improve performance, which means that instructions may or may not be committed to the disk in the same order the OS issued them. This breaks many of the assumptions that filesystems need to reliably implement things like journaling or COW, so disks provide a "cache flush" instruction that the OS uses when it needs it. In the Linux world, when a filesystem issues that instruction, it is called a "barrier". Filesystems such as XFS, Btrfs and Ext4 already use and enable barriers by default; Ext3 supports them but until this release it did not enable them by default: while the data safety guarantees are higher, their performance impact in Ext3 is noticeable in many common workloads, and it considered that it was an unnaceptable performance regression to enable them by default. However, Linux distros like Red Hat have enabled barriers by default in Ext3 for a long time, and now the default for mainline has been changed aswell.
In other words: if you use Ext3 and you note performance regressions with this release, try disabling barriers ("barriers=0" mount option).
The ip command is slowly replacing the functionality of the ifconfig command for networking. I recommend it instead.
Yes, you can actually. I got the apple earphones(needed to replace old ones) & mic set from my local mac store and I hooked them up to an ipod touch with the skype app and was able to make calls easily. This was using only 802.11b/g connections that were open where ever I was located. The biggest problem was spotty wifi connectivity and coverage. Also since I ride a motorcycle I was more worried about having access to emergency services, so I didn't go with it as a solution to totally replace my cellphone.
I could see that if it were economical, you could have all calls go to skype & skype-voicemail and talk when you're close to a wifi connection. While also having a prepaid cell phone for emergency calls. I was very close to doing this but since I'm on a family plan and my cell phone is only $10 extra it wouldn't really save me anything to go that route.
We have deep freeze as well here where I work. We have it turn off the pc's at 11pm. It turns them all on at 2:55am unfrozen, windows update runs at 3am (with the auto-install) also symantec anti-virus runs, and at 4am it refreezes the machines and shuts them back down. Wake-on-Lan will need to be setup on the PC's but this system works very well for patching & updating the machines while also keeping them frozen from mal-ware.
Let your IT guys know, it should be that simple... at least as far as freezing & updates.
I might have to turn in my slashdot id for this but, I have never seen Wrath of Kahn in any form... just never got around to it.
And I'm totally jealous of those that got to see the new movie!
yeah I was ignoring their printing business and just thinking of their unixes... I had forgotten about the Itanics though... like most of the world !zing!
Sun not so much, rumors are that IBM may buy them... HP is only alive b/c people are still using HP/UX and Tru64 for things.
IBM learned long ago the money is in selling support contracts. None of the other vendors ever seemed to really grasp that idea.
In Re: to my Re:, I like sqlite for simple DB applications, I get DB functionality with a very low overhead. Otherwise I use postgresql.
I have used Oracle and some others before now, but those are my two current DB's (sql-engines?) of choice.
How does it work for searching though? If I just have my "freespace" file and my pointers to records, does a search for some piece of user requested data have to hit every record or is there a hash somewhere for the data contained in the record? You don't mention it in your description.
It seems that the biggest advantage to a relational DB is that the syntax for accessing it is well known, SQL. It has a human read-able interface and while sometimes whonky to work with for complex operations, it provides the simplest cross-platform way to access data. I don't need to know which data blocks hold the data, I just ask the database for them "SELECT slashdotid, name FROM users where slashdotid 20000"... and I get rows of data.
Could I just read it from a file? Yes. Would it be simpler? Maybe. But what if I have 200001 records, then I have to do some magic sorting in my program, and I have to manage memory for them, and disk space, etc. It is simpler to let the DB handle that mess and I just ask for the data I need.
It breaks up the process of programming into data storage and data manipulation/presentation. DB's for storage, my bad python for manipulation and presentation.
--Donald
First Black President, that's why this is important. I plan to watch it. This is how far we as a nation have come in the 60 years since the civil rights movement and the Jim Crow laws that held black people down for so long. More than just another president being inaugurated this is a statement that anyone can achieve anything they push for. Yes, I'm a flag waving optimist about this but having grown up in an inner city and having seen the devastation of being poor in America, It makes me hopeful that things can change for the better.
This is the kind of thing that can give an inner city kid a shred of hope that he can get out of the slums and into something better.
I'm starting to get all preachy now, but that's why this is something kids should watch.
I'm going to second that. Wrath is very nicely done. The graphics are visually arresting. The quests aren't just kill six snow moose, it's go kill 10 crazed dwarfs and crack open their skulls to see if their brains are rotten... and I'm all for the skull cracking.
Blizz learned a lot from the BC expansion and definitely made this one better. I am a fan of WoW and have been playing for three years now. I often take breaks from it to play steam games, but no other MMO has offered anything remotely like it in terms of ease of use, that is, it doesn't act like it hates the player. But this is an AoC article so I'll stop being a slavering fan-boy now.
It's early voting time in FL! I voted, and I play WoW. As a 35 yro though, I probably don't fit in the normal WoW demographic...
Is Lynn Minmay dead? Please? I hated her and never saw what Rick liked about her. She was trash. Lisa was the hot one, something about a woman in uniform... oh uh yeah, umm I'm not a fanboy...
I'll take your idea and expand it a bit further, why not have people enter books they've read into a DB and rate them. Then you could see books which were "close" to ones you liked but not on your all ready read list. Amazon has this in their "People who liked this book also liked..." but it tends to miss the good books that only a few people have read. Add a feature which reduces rating by age, so that massively popular books, "Enders Game" which aren't "new" don't always show up at the top of the list.
Just an idea... scifi book social network...
Gabe has the details at:
http://www.penny-arcade.com/2007/08/29
"For example I had no idea that e for all had hired guerrilla marketers to wander the streets..."
Read below that for the story about the drunk vgXpo guy.
Burning my chance to mod but....
/etc/resolv.conf on *nix systems) in case one failed or wasn't responding "fast".
They have dealt with this in ISCs BIND. You can add:
zone "COM" {type delegation-only; };
zone "NET" {type delegation-only; };
to your named.conf file to allow only the "correct" servers to respond.
As far as copyright/patent/trademarking that is the what the Free Software Foundation and the GNU project try to do. MS does this to, AD is part of their process of "embracing and extending" "core internet protocols" (see the Halloween docments). DNS is tightly integrated in AD and it's a pain to untie it... but that's another rant.
Part of the issue with DNS is that it is a centralized system. You have to get your upstream DNS servers from somewhere. In most cases your ISP, as a centralized point for jumping off to the internet, works best for this. The ISP caches all DNS queries and everyone benefits from the cached information. This is repeated backwards at the top level of the DNS system(not really but it works for this explanation) where the DNS servers just tell your DNS server where to find the correct information. For DNS queries this system works best b/c it ensures that even if your system/upstream-DNS/cache doesn't have the answer it can travel up the DNS tree to find out who does have the right answer for a DNS query. In our case here the ISP isn't letting the failed query return to the user, it's sticking it's own ip addresses in as valid responses to the query. Which really means the even with a standard they are intercepting/breaking the normal chain of events. Other than either using your own or others' DNS servers there is not a lot you can do about it unless it is "fixed" by the offending ISP.
Now Just thinking out loud... I'm not convinced we can replace the centralized DNS system, it works well and responds well to failures. Decentralizing it would just return us back to the hosts file problems of the early days of the internet( http://en.wikipedia.org/wiki/Hosts_file ) What would be interesting would be a decentralized DNS cache system. Or a system of shared DNS caches either local or upstream of a user. The problem with this would be rotating through the resolvers designated DNS servers (usually provided by DHCP or hard-coded in
For WoW they have multiple 'realms' running on a single server. That is one of the facilities that has let them make cross-realm battlegrounds. The clients aren't jumping servers, just realms on the same server.
;-)
If a client performs an action, that action is sent to the server, the server makes sure it's a valid action, and then sends the result of the action back to the client and to other clients that are "Close" (within X radius, or same zone, continent, whatever). That seems to be the way WoW works. Someone did hack a WoW server together a while ago, but I think it doesn't work with newer clients. So most of the work is done sending messages back and forth to the server, not in actual processing on the server side.
Because the servers are a single point of contact for clients, it makes the process of programming very simple and robust (mostly... ok if you have enough servers and bandwidth) The content on the servers is the same. Moving a character between servers is an out-of-game process b/c the characters only exist on one server at a time.
Hope this answers some of your questions, and yes it is a good idea.
I wonder if nethack can be coded to an MMORPG
You are forgetting that while iPod/iTunes can play MP3's, AAC, and it's associated DRM, will be required and MP3's will be phased out. Then it will be a fight between your favorite DRM'ed format.
Hi Slashdot Editors & Mods, I like the idea that tags give a way to codify information based on small words with commonly accepted meanings. My Feature request would be that clicking on a tag didn't edit the tag, but brought up a list of global bookmarks or articles with that tag. So let me click on the 'anime' tag and get a list of people's 'anime' tagged bookmarks. I want the tags to be a search feature. I think this would make the tags even more usefull.
Also, how are "Popular" bookmarks figured out? By the number of people bookmarking the same site, or by the number of people following the link?
--Donald
Of course the question is, Can I get it? http://www22.verizon.com/FiosForHome/channels/Fios /HighSpeedInternetForHome.asp :-(
I'm not in their database (and I don't have verizon phone number) so no high-speed access for me.
It sounds like adrenalin. The adrenalin rush from playing fighting and sports games serves to deaden pain. This is just what it's supposed to do as part of the built-in "Fight or Flight" response. It keeps us going when were dead tired, but still needing to run from lions.
I get 'em to trail me and then shoot them with the machine gun. Shotgun for everything else.
Hehehehe Headcrabs, sounds like an STD to me..