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User: Alan+Cox

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  1. Performance Tips on Experiences w/ Software RAID 5 Under Linux? · · Score: 4, Informative

    There are a few things that really help in some cases, but RAM isn't always one of them.

    If you've got a lot of data that is read/re-read or written/re-read by clients then RAM really helps, streaming stuff which doesn't get many repeat accesses (eg running a movie editing suite) it might not help at all

    For performance its often worth sacrificing a bit of space and going RAID 1. Again depends if you need the space first or performance first.

    Obviously don't put two drives of a raid set on the same IDE controller as master/slave or it'll suck. Also if you can find a mainboard with multiple PCI busses that helps.

    Finally be aware that if you put more than a couple of add on IDE controllers on the same PCI bus it'll suck - thats one of the big problems with software raid 5 versus hardware which is less of a problem with raid 1 - you are doing a lot of repeated PCI bus copies and that hurts the speed of drives today.

    I use raid1 everywhere, disks may be cheap but you have to treat them as unreliable nowdays.

  2. *DO* go with 3ware on Experiences w/ Software RAID 5 Under Linux? · · Score: 2, Informative

    Except for the early 7000 series they are good cards and have decent performance too. I'm very very happy with the 3ware I have even though its one of the quite early designs.

  3. Avoid cheap raid controllers on Experiences w/ Software RAID 5 Under Linux? · · Score: 3, Insightful

    The cheap raid controllers are almost always software raid and not worth it. If performance is critical some of the higher end SATA and SCSI raid stuff is worth it, but a lot of that sucks too so do benches, take recommendations and don't believe in brand names...

  4. Re:What the hell? on SuSE Linux 9.2 Professional Released · · Score: 1

    You can download all the source rpms for the Red Hat RHEL packages if you want to. (or save yourself the hassle and grab Whitebox who've already rebuilt it).

  5. Re:Doesn't fedora have the new Gnome KDE and Kerne on SuSE Linux 9.2 Professional Released · · Score: 1

    Fedora Core 2 has had Gnome 2.6 for a good while now (and kernel 2.6). Ubuntu has 2.8, Fedora Core 3 release candidate has 2.8.

  6. Low end machines try EBay on How Cheap Can A PC Be? · · Score: 1

    A PII/233 system generally comes in about about UKP30 inc postage over here. Buy two stick both disks/ram in the one box and keep the other bits as spares.

  7. Re:Postmodern(Apple) != Postmodern(Orange) on The Extinction of the Programming Species · · Score: 1

    I hope the traditional blacksmith will always be there somewhere too. The guy who can fix something there isn't a machine for or make a part the *first time* it is needed.

    It's already becoming a problem for people restoring old equipment and devices because there are many things we used to make that we no longer have the facilities for. Want a boiler tube flanged for example and the nearest option for the UK is probably eastern Germany... if you hurry.

  8. Re:Why KEEP records? on UK High Court Orders ISPs to Identify File-sharers · · Score: 1

    One reason to keep records is so that when a court reviews a request and considers it reasonable you have the data be it music piracy, card fraud or even spamming.

    I'm glad to see the music industry taking this path, this is the right approach. Show the courts the evidence, get an order and then pursuse the actual people commiting the crime not the manufacturers and distributors of multi-purpose tools.

    Music piracy in the uk is an offence, the way to change that if you don't like it is to convince government and to show a sane alternative if one actually exists.

    Alan

  9. Re:Qua?? on Virgin's New iPod Rival · · Score: 1

    The irony is the next story down is about the iRiver products - and those _do_ support OGG !

    Alan

  10. Re:Rio Car was amazing in its day.. on iRiver to Build In-Dash Digital HD Players · · Score: 1

    True but you can buy mini-itx PC cases in card stereo form factor now and roll your own with added support for video, gps ....

  11. Re:Hmm... on Novell to Defend Open Source Using Patents · · Score: 3, Insightful

    Its a start. It would be nice to see some kind of statement about use of Novell's patents by open source software to go with it.

    In answer to your other question some folks do use patents and open source together. It isn't an ideal world and it cuts out anyone with under about 10 million US to play the game. In the Red Hat case we've published a patent promise which we hope would be a model for others to follow (or improve upon!)

    IBM have also provided various patented technologies for free GPL use including key scaling technologies like RCU.

  12. UK Culture and the TV License on New Fee For Internet-Capable PCs In Germany · · Score: 2, Insightful

    There are two problems with your rant. The first is that part of the cost goes towards things like ensuring you get good reception and the second is that surveys show most UK people *like* and consider the TV license funding the BBC to be a good thing. In the UK a TV capture card requires a TV license (the license covers several things so its not one per device). The arrangement we have now (which goes back about 70 years) is reviewed regularly to see if it is still the right model.

    Secondly the US does precisely the same thing with other services. The UK places most taxes for funding roads on fuel, so those who use it pay for it. The US near enough arbitarily charges all its citizens for road use however much they use it and however much damage they do. And I'm sure US folks are happy with that side of it.

    Not to say we don't have a current problem case - if you want commercial satellite TV but not digital/analogue broadcast and the BBC you can't opt out as you can't opt out by not having a TV.

    I can see the UK eventually extending TV licensing but not to PC's rather to broadband connections - which makes a lot more sense.

    PS: One amusing side story is that 90% of TV license offences are not the result of their magic vans (most of which are fake and empty) but neighbours reporting people they don't like.

  13. Re:Google has to do it, not make it work on Breaking Google's DRM · · Score: 1

    To do business with the US government you have to meet S.508 accessiblity in your products. You don't think everyone would take up disability as "enhancing shareholder value" otherwise do you 8(

  14. Re:Original ideas are highly overrated on Alan Cox on Writing Better Software · · Score: 2, Interesting

    If you are giving a talk to people in small businesses do you want to give them a list of things they can do or have an esoteric discussion over the relative reliability data for C++ and Java exception models ?

    I'm glad you don't think the content is original - that means you are one of the people who actually has some idea of how to write good code and automate/enhance the testing side. Unfortunately to a lot of people out there actually writing code in business the concepts are new.

    This was Alan's morning talk to local businesses. I'm suprised it was even worthy of slashdot, when things like Indymedia disks being seized by the FBI and rackspace are apparently not even noticed by the slashdo crowd

    Oh wait .. Rackspace are advertisers
    8)

    Alan

  15. Re:Goodbye SNMP? Hardly. on Goodbye SNMP? Hello, WS-Management · · Score: 4, Insightful

    Also on the folks churning out billions of tiny little devices. If you've only got 16K of RAM TCP is hard work let along management services while UDP is doable properly on a microcontroller.

  16. Re:Google has to do it, not make it work on Breaking Google's DRM · · Score: 2, Insightful

    Unfortunately it fails accessibility rather badly. Since Google has an EU office I guess that means any DMCA threats can be met with counter accessibility law threats. Plus I guess google just blew its ability to do deals with US government 8)

  17. Re:Code review and pair programming on Alan Cox on Writing Better Software · · Score: 3, Insightful

    If you are bug hunting then the code review needs to be an explanation of what the code does. "We get a foo, we have to decide if its in US or UK format so we compute both checksums and .. oh umm.. I'll come back later'

    It's very different to things like design reviews. They have their place too. A lot of things Linus rejects are really design review things. Its not uncommon to get a "Yes this needs fixing but do it this way instead". It works well providing the person saying that has good judgement.

    Bad code review, bad tools, bad compilers and bad managers are _all_ useless

  18. Re:Cyanide? on Via Will Join The 64-Bit Fray · · Score: 4, Funny

    Well one of their previous processors was codenamed C4, and the story has it this was changed because "C4" is a high explosive and they feared confusion when shipping large numbers of small packages labelled C4 around

  19. Re:WTF? Kodak?! The camera people? on Kodak Wins $1 Billion Java Lawsuit · · Score: 4, Informative

    People forget but Kodak _were_ a Unix company at one point. Kodak interactive systems corporation. In fact if I remember rightly and ironically they sold that business to Sun to help Solaris x86 off the ground.

    Another dying US corporation harms the efficiency of US businesa and harms other US businesses. Its no wonder the Chinese are winning in the technology battles.

    Alan

  20. Why not ? on Syllable 0.5.4 Released · · Score: 4, Insightful

    Its easy to look at it and pick holes (and I can see a lot of holes to pick from the comments about tar and attributes onwards) but it is still a great way to learn to program and to do stuff.

    What would have happened if everyone told Linus "there's already Windows, Minix, Hurd, OMU.. why bother' ?

    Alan

  21. Re:open Virtual machine (for java, C# python perl) on Red Hat Acquires Netscape Server Products · · Score: 2

    There are a lot of patent questions around mono, mostly when you go beyond the core language spec. There are lot of patents around java too but at least IBM owns most of them.

    For the moment Red Hat has been extensively involved in things like the GNU java compiler. That has an additional advantage over a virtual machine - it can generate native code so you can program in java and get sane memory consumption and performance, while jits generally only achive one of the two (or neither usually)

  22. Re:Its called a trademark silly on Open Source And Closed Standards? · · Score: 1

    Actually the way Open Source has generally approach the OpenGL mark licensing and testing is not to call itself OpenGL, but to use names like Mesa.

    Ditto Linux is not Unix.

    Ditto a collection of Red Hat Enterprise Linux sources rebuilt by someone else is not RHEL but Tao/Whitebox/etc.

    This is a solved problem and the trademark like approach works. Vendors will certify to the 'real thing' unless there is some very strong variant in the market.

  23. It isn't the monitor on Does Your LCD Play Catch-Up To Your Mouse? · · Score: 1

    I have a Dell 2001FP. Its nice and sharp at 1600x1200 and while its not the best TFT on the planet it is cheap and I see no lag running bzflag at 1600x1200.

  24. Flightgear ? on NASA Releases World Viewer · · Score: 1

    Its truely stunning. Now has anyone figured out how to plug these data sets into flightgear ?

  25. Re:Credit card ? on Verisign Develops Token for Age Verification · · Score: 1

    If its been done right its a single token, once. All it has to encode is year of birth plus a crypto handshake. Verisign is in the crypto business so I'd hope its a proper crypto key