The best option is a 8 up to 64 MB PC card or Compact Flash. All intitutions PCs should have a PC card slot so students can bring their own flash memory card. 16 to 32 MB is enough for carrying practices and source code. It is very reliable, fast and readable by most OSes.
This is the problem of a company (not only AOL) that provides conectivity and contents. This has to be goverment controlled or at least avoided my _smart_ users.
Content companies DO NOT and NEVER WILL want you to access other content pages. Internet is basically free and wide access to content. An ISP has to enable users to access that content. If your ISP provides content too, you will be fooled, sooner or later.
The problem with AOL users is that they think that this the only way to obtain valuable content.
What I don't understand is the trillion of dollars spent in expensive notebooks, with short live batteries (due to the high speed processors) only for word processing.
I also own an Inspiron (7500, PIII 500 Mhz, 256 MB of RAM), but this is used as desktop due to small size and it's cheaper that most of medium notebooks in the market. For the airplane, I still use my old Toshiba (P-MMX, 200 MHz) with a new battery, which gives me 5 to 6 hours without any problem.
I am convinced that Intel can produce new processor with the same capacity as old Pentiums and Celerons with a very low battery consumption, the problem is that the braindamaged "market" is eager for faster processor...
For this you don't need even a PII, an old 233 Mhz P MMX or Celeron 300 MHz with 64 MB for Linux or 128 MB if you run Windows (or StarOffice), it's more then enough. Even those processors used in the news PDAs, especially iPaq (a 206Mhz RISC) would fulfill all your requirements.
I still don't understand this rush for ultra faster processors in notebooks, while more than 90% of the people use them only for text processing and power point presentations. I've never seen a hacker compiling a kernel in a plane. Humm... may be Eric Raymond?
I am terribly sorry I won't be able to speak in your conference. (Alan Cox)
Not a chance in hell. (Linus)
Not a problem at all. It's a LUG, so I will speak for free. Be sure of taking car of everything, I don't bring money, I don't use credit cards. Buy a business class ticket, the travel is long, you know, and I need to plug my RedHat/VA Linux notebook, I don't have time to sleep, evangelism is so hard. (Eric Raymond)
I hope not to find any commercial ads in the conference room. Don't invite ESR to speak in the same day. KDE sucks. Qt is evil. I know nothing about linux, I can talk about GNU/Linux. (Richard Stallman)
Do I have to talk about 3Com drivers? (Donald Becker)
Mamma mia, I won't be able, I am still implementing triple elevator algorithm with a single pointer buffer cache and page colouring. The I will spend my whole holidays correcting the bigs in my code and then a couple of week until I finish uploading them with my stupid 56Kmodem. Porca miseria, la madonna. (Andrea Arcangeli)
TCP congestion algorithms measures the roundtrip time of a packet and its ACK, and ACKs are are sharing uplink with other users downloading files from your machine.
The real effect is that TCP assumes you have a very long delay due to network latencies, it increases its sliding windows and this finnally brings to a situation were most of the ACK are "timeouted", the window is reduced to a half and packets are retransmitted. More bandwidth congestion and you go to thrashing.
In few words, even for one way traffic, you need some spare bandwidth for ACKs, otherwise you get timeouts and packet retransmissions. So, it's not a myth.
Re:Europe does the effort. USA?
on
Air-Powered Cars
·
· Score: 1
they consume about 40% of
Uhmm... I underestimated it, it seems to be 60% instead.
Americans!!! Be in a hurry, park your big car for a while and go to buy the ticket to Europe. Check the airplane is an Airbus, they consume less that Boeings (although 767 and 777 are very close:-).
European citizens, companies and government are doing a big effort to reduce CO2 emissions and to reduce the green house effect: high taxes to fuel, promoting the use of public transport, small cars, low consumption diesel engines, restrictive rules for car manufacturers, R&D projects to build cars to consume just 1 litre for 100 kms, etc. etc.
But USA is the _highest_ CO2 producer all around the world, they consume about 40% of the destilled petroleum, they like big cars and hate small cars, they enjoy the cheapest gasoline of the world (about 1/4 - 1/3 than the European average), their laws are less restrictive than european laws...
The best policy to reduce CO2 emission to a half in short period of time is to move all Americans to an European country.
Indeed, it's a good idea for them also, because the Euro is very cheap against the dollar.
COME HERE, so we can forget air-pumped cars for a while.
According to the ads in Spain, UPS provides all services you want. Even they have olimpics in their staff, so I think its a good crew.
Altough I am not sure the provide remote shell, their tracking system is unbeatable by any SMTP system, nevertheless you could get something similar with traceroute.
Also, I like very much their black cabs, their are cool, much more than a TCP packet and pine in a text console.
Problems are round-trip times and QoS pricing.
I and a friend of mine tested their round trip time few weeks ago. I've sent a 24 hs. letter to California and he returned it to me inmediately. It took 72.34 hours, which much more than a 145 ms via TCP, and more expensive (and slower) than the similar content in a e-mail message. But at least I am sure no sysadmin read my letter...
Are you crazy? Star Office a good application? It's slow, bloated, it hangs, dry RAM, not fully compatible with Word2000, etc. etc, and even has its own desktop!!!
I hate MS, but don't tell me StarOffice is better than Word or Excell 2000. Stick to SO if you like it and have enough memory, but I recommend it so easily, specially to my mother.
Forbidden
You don't have permission to access/features/savedotcoms/sally.shtml on this server.
Yes, I am eager to put money in a company with well configured servers as yours...
Hire a good sysadm, then we will talk.
--ricardo
He is a lawyer, not a geek
on
Is UNIX An OS?
·
· Score: 1
...for example, it created the Network Filing System (NFS)...
More lawyers? Oh my god...
Many people consider a Web browser, media player (like QuickTime), e-mail, file manager (like the Finder or Windows Explorer)..
Yes, he's a lawyer, a Microsoft lawyer!!!
While a browser is not integral to the code of the OS (as Microsoft tried to stupidly argue in court), it is quickly becoming an integral part of the user experience (which it should have argued).
Don't cheat, it's clear...
In the future (if not the present), many programs will be written to communicate with the browsers, e-mail packages and other parts of the operating system that interface with the Internet.
Yea, yea, the.NET computer...
This is where OS X comes in. Here, Apple is creating an entire operating system..
Might be they finally decided to build an OS, but it's notorious they injected 150 Mdollars.
He's been playing with and programming Macs since 1984
Poor guy, forgive him.
He doesn't know how fork() works. He has no idea of unfragmented memory. He thinks UNIX still uses variable partitions. He is convinced the GNOME or KDE (or even Motif) are unithreaded desktops. He believes UNIX takes 18 minutes for starting up.
IDENTIFICATION DIVISION.
POST-AUTHOR. ANDY GHERNA.
I see you are older than 35, and you are partially guilty of the forgotten Y2K. But I rememember you...
In Linux, each application still has its own heap and that can still be fragmented.
Wrong, there isn't exist fragmentation in pages/paging systems (pages != paging, although both are normally present). When you talk about fragmentation you must clarify if you mean "external fragmentation" (memory chunks that are not assigned to any process) or internal (assigned but unused).
More precisely, the external fragmentation in page systems is _zero_, the internal fragmentation is equal to the n*s*p/2, where n is the number of active process, p is page size and s is the number of segments of every process. For pure paged systems, s=1. Nevertheless, the internal fragmentation is residual.
UNIX in general uses pages, that's logical addresses are mapped to physical ones _during_ the execution of the program (by mean of page tables and hardware support that convert page numbers to frame numbers).
Frames have the same size as pages. Pages and frames have sizes of 2^n bytes, for example 4096 in i386 world, 512 in VMS.
If pages are of 4096 bytes (2^12), that means that the first twelve bits of the logical address are used as an index to the page table of the process. The value of the entry is the physical address of the frame, represented in 12 (or more... ) bits.
Processors and UNIXes (and Windows) also uses a combination of segmentation and pages, mainly for avoiding problems of huge page tables and to allow mapping of logical address to higher physical addresses, for example to overcome the 4GB limit in i386 architecture (IA32), where the "theoric" maximum is 2^32=4GB of physical memory.
Because pages of the same process don't need to be consecutive (the logical space does not match the physical one), you never need to reallocate memory for getting bigger chunks.
OTH, ELF is a _file_ format for storing compiled programs, libraries, shared lib references, and so on. The program is always executed in memory, not in the ELF world, althougth ELF helps a lot for "paging on demand", cacheing and shared libraries, it's not the "core image" of a process.
Ku-Band Communications System. The Ku-band system is the primary return link for International Space Station (ISS) video and payload data transmitted in digital format to the ground. The space-to-ground antenna (SGANT) will be relocated and attached to the single-beam boom of the current Ku-band antenna on EVA1.
I am not convinced that digital links in the space station is a real challenge, while a stationary satellite is 36.000 km away from ground, the ISS is only about 400 km. So, it must be much easier than uplinking to a satellite, which is a very well known technology.
OTH, I am not sure of the usefulness of the links for video-conferencing with relatives and space control. But it might be very useful if the allow p0rn video there. It's normally cheap for their budget, only $20 to $90 for a year subscritpion and they will be able to research:
Behaviour of floating sperm under microgravity conditions and 3 degrees of freedom.
Glueing effects of the sperm with zero external-uncontrolled G-forces.
Random-brownian movements of spermatozoids under residual G forces.
Sure they can get funding from the EC or NSF, just ask Bruce Perens to prepare the proposal and exploitation plan.
And did you see the location of the battery PACK? That's a macho.
I'm sure they are going to release Mrs Aibo (or Aiby?). According to some company leaks, the PC card in Aiby will be almost in the same location, may be a little lower. The difference is that will accept double sized cards.
Slashdot Mirror
The best option is a 8 up to 64 MB PC card or Compact Flash. All intitutions PCs should have a PC card slot so students can bring their own flash memory card. 16 to 32 MB is enough for carrying practices and source code. It is very reliable, fast and readable by most OSes.
There are other OSes apart of UNIX. An no UNIX user has an AOL account... An the AOL browser is not exactly Netscape or Mozilla.
Content companies DO NOT and NEVER WILL want you to access other content pages. Internet is basically free and wide access to content. An ISP has to enable users to access that content. If your ISP provides content too, you will be fooled, sooner or later.
The problem with AOL users is that they think that this the only way to obtain valuable content.
I also own an Inspiron (7500, PIII 500 Mhz, 256 MB of RAM), but this is used as desktop due to small size and it's cheaper that most of medium notebooks in the market. For the airplane, I still use my old Toshiba (P-MMX, 200 MHz) with a new battery, which gives me 5 to 6 hours without any problem.
I am convinced that Intel can produce new processor with the same capacity as old Pentiums and Celerons with a very low battery consumption, the problem is that the braindamaged "market" is eager for faster processor...
--ricardo
I still don't understand this rush for ultra faster processors in notebooks, while more than 90% of the people use them only for text processing and power point presentations. I've never seen a hacker compiling a kernel in a plane. Humm... may be Eric Raymond?
--ricardo
Not a chance in hell. (Linus)
Not a problem at all. It's a LUG, so I will speak for free. Be sure of taking car of everything, I don't bring money, I don't use credit cards. Buy a business class ticket, the travel is long, you know, and I need to plug my RedHat/VA Linux notebook, I don't have time to sleep, evangelism is so hard. (Eric Raymond)
I hope not to find any commercial ads in the conference room. Don't invite ESR to speak in the same day. KDE sucks. Qt is evil. I know nothing about linux, I can talk about GNU/Linux. (Richard Stallman)
Do I have to talk about 3Com drivers? (Donald Becker)
Mamma mia, I won't be able, I am still implementing triple elevator algorithm with a single pointer buffer cache and page colouring. The I will spend my whole holidays correcting the bigs in my code and then a couple of week until I finish uploading them with my stupid 56Kmodem. Porca miseria, la madonna. (Andrea Arcangeli)
TCP congestion algorithms measures the roundtrip time of a packet and its ACK, and ACKs are are sharing uplink with other users downloading files from your machine.
The real effect is that TCP assumes you have a very long delay due to network latencies, it increases its sliding windows and this finnally brings to a situation were most of the ACK are "timeouted", the window is reduced to a half and packets are retransmitted. More bandwidth congestion and you go to thrashing.
In few words, even for one way traffic, you need some spare bandwidth for ACKs, otherwise you get timeouts and packet retransmissions. So, it's not a myth.
--ricardo
I dono't wy. D'you?
Uhmm... I underestimated it, it seems to be 60% instead.
Americans!!! Be in a hurry, park your big car for a while and go to buy the ticket to Europe. Check the airplane is an Airbus, they consume less that Boeings (although 767 and 777 are very close :-).
--ricardo
European citizens, companies and government are doing a big effort to reduce CO2 emissions and to reduce the green house effect: high taxes to fuel, promoting the use of public transport, small cars, low consumption diesel engines, restrictive rules for car manufacturers, R&D projects to build cars to consume just 1 litre for 100 kms, etc. etc.
But USA is the _highest_ CO2 producer all around the world, they consume about 40% of the destilled petroleum, they like big cars and hate small cars, they enjoy the cheapest gasoline of the world (about 1/4 - 1/3 than the European average), their laws are less restrictive than european laws...
The best policy to reduce CO2 emission to a half in short period of time is to move all Americans to an European country.
Indeed, it's a good idea for them also, because the Euro is very cheap against the dollar.
COME HERE, so we can forget air-pumped cars for a while.
--ricardo
Nope at all. If I want Office 2K, I run Windows. If I want to be cool because there are students or colleagues coming to my office, I boot Linux :-)
--ricardo
Altough I am not sure the provide remote shell, their tracking system is unbeatable by any SMTP system, nevertheless you could get something similar with traceroute.
Also, I like very much their black cabs, their are cool, much more than a TCP packet and pine in a text console.
Problems are round-trip times and QoS pricing.
I and a friend of mine tested their round trip time few weeks ago. I've sent a 24 hs. letter to California and he returned it to me inmediately. It took 72.34 hours, which much more than a 145 ms via TCP, and more expensive (and slower) than the similar content in a e-mail message. But at least I am sure no sysadmin read my letter...
--ricardo
I hate MS, but don't tell me StarOffice is better than Word or Excell 2000. Stick to SO if you like it and have enough memory, but I recommend it so easily, specially to my mother.
--ricardo
What's the heck you say? Berner-Lee has presented a paper, he has given a speech. It was in 1989, in a workshop of High Energy Physics.
Read the history...
--ricardo
Yes, I am eager to put money in a company with well configured servers as yours...
Hire a good sysadm, then we will talk.
--ricardo
More lawyers? Oh my god... Many people consider a Web browser, media player (like QuickTime), e-mail, file manager (like the Finder or Windows Explorer) ..
Yes, he's a lawyer, a Microsoft lawyer!!!
While a browser is not integral to the code of the OS (as Microsoft tried to stupidly argue in court), it is quickly becoming an integral part of the user experience (which it should have argued).
Don't cheat, it's clear...
In the future (if not the present), many programs will be written to communicate with the browsers, e-mail packages and other parts of the operating system that interface with the Internet.
Yea, yea, the .NET computer...
This is where OS X comes in. Here, Apple is creating an entire operating system..
Might be they finally decided to build an OS, but it's notorious they injected 150 Mdollars.
He's been playing with and programming Macs since 1984
Poor guy, forgive him.
He doesn't know how fork() works. He has no idea of unfragmented memory. He thinks UNIX still uses variable partitions. He is convinced the GNOME or KDE (or even Motif) are unithreaded desktops. He believes UNIX takes 18 minutes for starting up.
He's still programming in Pascal and Hypercard.
Understandable...
--ricardo
END SECTION.
--ricardo
--ricardo
AppleII used the same technique for "doubling" the resolution of the screen.
I think this was a topic in /. months ago. I don't remember the links.
--ricardo
Wrong, there isn't exist fragmentation in pages/paging systems (pages != paging, although both are normally present). When you talk about fragmentation you must clarify if you mean "external fragmentation" (memory chunks that are not assigned to any process) or internal (assigned but unused).
More precisely, the external fragmentation in page systems is _zero_, the internal fragmentation is equal to the n*s*p/2, where n is the number of active process, p is page size and s is the number of segments of every process. For pure paged systems, s=1. Nevertheless, the internal fragmentation is residual.
--ricardo
Frames have the same size as pages. Pages and frames have sizes of 2^n bytes, for example 4096 in i386 world, 512 in VMS.
If pages are of 4096 bytes (2^12), that means that the first twelve bits of the logical address are used as an index to the page table of the process. The value of the entry is the physical address of the frame, represented in 12 (or more... ) bits.
Processors and UNIXes (and Windows) also uses a combination of segmentation and pages, mainly for avoiding problems of huge page tables and to allow mapping of logical address to higher physical addresses, for example to overcome the 4GB limit in i386 architecture (IA32), where the "theoric" maximum is 2^32=4GB of physical memory.
Because pages of the same process don't need to be consecutive (the logical space does not match the physical one), you never need to reallocate memory for getting bigger chunks.
OTH, ELF is a _file_ format for storing compiled programs, libraries, shared lib references, and so on. The program is always executed in memory, not in the ELF world, althougth ELF helps a lot for "paging on demand", cacheing and shared libraries, it's not the "core image" of a process.
--ricardo
Furthermore there isn't exist any physical devices able to reproduce square signals. Just physics: mass, inertia, acceleration...
--ricardo
I am not convinced that digital links in the space station is a real challenge, while a stationary satellite is 36.000 km away from ground, the ISS is only about 400 km. So, it must be much easier than uplinking to a satellite, which is a very well known technology.
OTH, I am not sure of the usefulness of the links for video-conferencing with relatives and space control. But it might be very useful if the allow p0rn video there. It's normally cheap for their budget, only $20 to $90 for a year subscritpion and they will be able to research:
Sure they can get funding from the EC or NSF, just ask Bruce Perens to prepare the proposal and exploitation plan.
--ricardo
VAIO, AIBO or how to play twice in a row with four letter words with only three vowels in the same order.
Nice for a IQ test, what of the following Sony names follow the sequence?
And, who will post it to /.? Hemos o CmdrTaco?
I'm sure they are going to release Mrs Aibo (or Aiby?). According to some company leaks, the PC card in Aiby will be almost in the same location, may be a little lower. The difference is that will accept double sized cards.
--ricardo