Jump to content

Mihle

Member
  • Posts

    3,717
  • Joined

  • Last visited

Reputation Activity

  1. Informative
    Mihle reacted to leadeater in Toyota’s Japanese production was halted due to insufficient disk space   
    That's actually what makes it so crucial not to lose any of the transactions. Even if only a few hours that could be a hell of a lot of parts Toyota would no longer know where they are and all the information is now inaccurate to reality. Super bad news.
     
    Of course I could say should be easily mitigated by having a synchronous database copy as well as a asynchronous DR copy but that depends if it was just the database volume only that ran out of space or the entire underlying storage aggregate/array, and also what else that may have been sharing that. We don't share our SSD trays and aggregates with workload types so our VMs run on dedicated SSDs and  SQL/DBs run on their own, no everyone does then. While we have A LOT of SSDs and there is no performance concerns sharing and spreading the workloads across them all we choose not to to limit failure domains and outage impacts. This isn't a cost factor either since it wouldn't really change it much or at all, just design architecture decisions.
  2. Informative
    Mihle reacted to leadeater in Toyota’s Japanese production was halted due to insufficient disk space   
    When you delete data from a database it is written in to a transaction log which consumes disk space, you then usually clear the space out by running a database backup with truncate transaction log flag set. If you run out of disk space while deleting data and an open transaction is running bad things happen, really bad sometimes.
     
    Data loss for Toyota might be unacceptable due to the ongoing problems that would cause so they likely waited for extra capacity to be added to the storage array, something that took 2 days is entirely reasonable time frame. After that you can expand the storage space and attempt to recover the database and all it's transactions that wouldn't be present in the latest backup.
     
    Not an uncommon situation, I am however surprise the database didn't have an synchronous DR copy they could failover to that had up to the last successful transaction.
     
    There are other scenarios and database server architectures they could be using which changes how the failure could have happened but either way not an uncommon issue to happen and easy to get in to if not careful. Fundamentally the same just minor detail differences.
     
    Sounds like either inadequate storage utilization reporting and alerts or something made a large mistake and deleted or modified far too much data resulting in an extremely large transaction log.
  3. Informative
    Mihle reacted to brwainer in Toyota’s Japanese production was halted due to insufficient disk space   
    I don’t have insight into their system. But I do have insight into a system that is probably similar complexity, age, and annoying-ness.
     
    $dayjob has a custom-built application that was originally developed in the early 1980’s. It exclusively runs on Unix mainframes, currently HP-UX mainframes with Intel Itanium processors since the early 2000’s. We were one of the companies that bought into the hype of Itanium, but it was already a Unix Mainframe application so the porting from whatever it ran before to Itanium wasn’t hard, and HP themselves helped with the porting because we were an early customer. Two decades later and we are trying to port it to Linux/x64 but day to day production still relies on 8 HP-UX systems that take up 1/2 of a rack each. An entire datacenter is built around supporting them.
     
    Anyway, relevant to this story, for us the issue isn’t “disk space”. The HP-UX OS is capable of mounting iSCSI shares of any arbitrary size (I believe its been patched with ext4 support). The issue is that the system uses files with specially laid out metadata structures as databases. Technically all databases are files at the end of the day - have to structure the data on disk somehow. The difference is that this is some special type of database written in the early 2000’s that is tuned for fast processing by the Itanium CPUs and to be read directly between disk and RAM, and the data structure has to be written out in advance. Its like formatting a drive before you can use it, or if you’re old enough to know these things its like writing the sectors onto a HDD or FDD directly. Every time the system is down for maintenance, in addition to their other tasks, the Unix Admins run scripts to expand the database files as fast as the system can handle it - literally just writing out empty areas at the end of the existing database files for it to fill in with data later. If the system ever caught up with the prepared database area, it would crash and require emergency expansion. I suspect it is something like this when they say they ran out of disk space - and it sounds like their application didn’t just halt immediately but instead tried to keep running and they lost a bunch of data either that was trying to be added, or already stored on disk. The two days was probably the time it took to restore the most recent backup, and replay/rebuild as much data as they could.
     
    The decisions around making the system this way made sense at the time - there’s no use in complaining about decisions made two decades ago. But its hard to swap a diesel engine for the steam locomotive while the train is in motion.
     
    Edit: Went and read the actual article. This sounds like a more mundane issue than I thought - it literally ran out of disk space when they tried to update it, but when it did so it deleted some data. And they resolved it by recovering to a new server with more space. That’s just bad administration.
  4. Informative
    Mihle got a reaction from ebprince the computer nerd in Have you found any native 8K YouTube videos?   
    Reason why 4k YouTube can look better than 1080p YouTube on a 1080p monitor is not anything to do with the extra resolution, that gets lost. The reason is the higher bitrate.
  5. Agree
    Mihle reacted to Spotty in Why is 2160p 4K   
    You go off the horizontal resolution not vertical.
    3840x2160 = (almost) 4k horizontal pixels.
     
    I've never heard anybody refer to those as 1k or 1.5k. 1280x720 is typically referred to as HD while 1920x1080 is Full HD. 
  6. Agree
    Mihle got a reaction from Andrewtst in Suggestions for a work monitor for large spreadsheets that isn't too expensive?   
    I would personally not get 1440p 31,5", pixel density is too low. Either go 1440p 27" maximum or 4k 31/32"
    (If you aren't going for ultrawide)
  7. Agree
    Mihle got a reaction from Andrewtst in Display 1080p vs 1440p vs Ultra wide vs super ultra wide   
    Some people love ultrawide, but personally I prefer 16:9. It's a taste thing do you really need to see them physically and decode for yourselves.
     
    That said, all games work well on 16:9 because it's the standard, but there are games that don't work that well with ultrawide. They can for example have black bars on the sides.
  8. Agree
    Mihle reacted to Andrewtst in Display 1080p vs 1440p vs Ultra wide vs super ultra wide   
    Most common will be wide screen. 16:9 aspect ratio. 
     
    But which is better, is user preferable, suggest you go check out at shop before decide.
     
    Aspect Ratio
    Wide - 16:9 aspect ratio Ultrawide - 21:9 aspect ratio Super Ultrawide - 32:9 aspect ratio (2 units of 16:9 wide display) Recommended Wide resolution 
    24" - 1920 x 1080 27" - 2560 x 1440 32" and above - 3840 x 2160 (4K) Recommended Ultrawide resolution 
    29" - 2560 x 1080 34" - 3440 x 1440 Recommended Super Ultrawide resolution 
    49" - 5120 x 1440 Not Recommended Super Ultrawide resolution 
    57" - 7680 x 2160 (This is 2 units of 32" 4K resolution display, and basically no GPU is very capable yet for gaming) Recommended HDR display 
    Any WOLED for Wide Any QD-OLED for Ultrawide and Super Ultrawide  DisplayHDR 1000 with 1000+ Local Dimming Zone mini-LED Important noted for OLED display 
    Text fringing issue. Not Recommended Acer brand as Acer did not provide way to turn off ABL. May happen burn-in if you are very long hours user with same static image.
  9. Like
    Mihle reacted to LAwLz in OCBC Bank app starts flagging users for apps installed through third-party app stores   
    That wouldn't prevent what they are trying to prevent though.
    The catalyst for this change seems to have been people getting scammed. It wasn't directly related to the banking or banking app itself. It's just that they are using their own banking app as a vehicle to introduce some rather primitive anti-virus to peoples' phones.
     
     
    This is how we do it in Sweden too.
    All the big banks got together and created their own "digital ID", which is used for a lot of 2FA duties, as well as some other stuff.
    I think it's a great system, but I'd prefer if it wasn't run by for-profit banks. Especially not since it's grown to be so massive that basically everyone depends on it.
  10. Agree
    Mihle reacted to Arika in Did LTT "KILL" True 7.1 Surround Headsets?   
    you are putting waaaaaaaaaaaaaaaaaaaay to much faith in LTT's power. a single video changing the entire direction of a whole industry?
  11. Agree
    Mihle reacted to OhioYJ in win-rar.com vs rarlab?   
    7zip unpacks rar files, it's free and opensource.
  12. Like
    Mihle got a reaction from Fire_Burns_22 in From what you've seen on videos, who are your favourite LMG on-camera people? (Can't choose Linus or Yvonne)   
    Alex, Luke and Brandon(if he had still worked there) is people I would like to see more of.
  13. Like
    Mihle got a reaction from Eigenvektor in NVIDIA DLSS 3.5 announced: Beyond denoising   
    I know they do that in games settings, but that's not what I talked about. I said the marketing. If you look up lot of the marketing for DLSS, a lot of it just day "DLSS 3 On" and off, not "DLSS Frame Generation on" and off.
  14. Like
    Mihle reacted to William Payne in Where did this "Linux is only free if you don't value your time" propaganda came from?   
    I’d love to know what the people who have such massive problems with windows are doing. In my younger days my pc’s were built by my dad using whatever cheap parts and pirated windows versions he could find. So obviously there were problems now and then. But not many. Then I had an HP laptop for many years who’s only problem was it got ridiculously slow.
     
    I left windows and went to Mac for a few years then built my current pc two years ago with a fresh windows 10 pro install on it and it has been the most pain free user experience ever. Currently running 11 pro and it’s fine. If I have issues it’s because I did something dumb. 
     
    Though I do think the generic windows home versions in store brought systems may come with extra crap that has problems.
     
    But fresh installs are great. 
     
    I think the big thing is the people who get hacked and get viruses and all kinds of stuff can’t leave a good thing alone. They click on things they shouldn’t and download things they shouldn’t. 
     
    I have no issues with Linux but windows has no problems for me. 
     
     
     
  15. Agree
    Mihle reacted to Mrpizzaeater145 in Got an old laptop, says not compatible with windows 11. Should I use a workaround, or is linux a better option?   
    I know for a fact that if I installed a Linux distro on my moms laptop I would turn into her 24/hr tech support. If you don't have TPM 2.0 then stick with windows 10. Just Do the classic "fresh" install of windows 10, install drivers and call it a day. Windows 10 is still receiving updates until Oct. 14th 2025. 
  16. Agree
    Mihle reacted to Jackalneck in About WAN Show   
    journalism [ jur-nl-iz-uhm ]
    the occupation of reporting, writing, editing, photographing, or broadcasting news or of conducting any news organization as a business
  17. Agree
    Mihle reacted to Neroon in How are you all choosing to show LTT support?   
    I'm not. It's unhealthy to want to support a massive money making company. If they have something to offer you like, consume it. If not, then don't. 
  18. Agree
    Mihle got a reaction from MaverickZA in Has Anyone Else Unsubscribed From Gamers Nexus?   
    I have never liked Gamer Nexus except one video now and then, I can't point exactly why right now tho.
    I have recently subscribed to Der8bauer tho.
  19. Agree
    Mihle got a reaction from Eventide in Who do you wish would go solo?   
    I don't think Jake would fit with making videos alone, he fits as secondary person. I think Alex is more likely to be able to make funny videos on his own.
  20. Agree
    Mihle reacted to jnmaster in Alternatives to LTT/LMG?   
    GN is probably one of the most boring channels out there.. His voice puts me to sleep. No thank you lol.
  21. Agree
    Mihle reacted to GoodBytes in 27 vs 32 4K - Your opinion pros and Cons   
    Everyone is different. I see a big different between 1440p and 4K on a 27inch. Some say that they look identical.
    Personally, I never cared what other people say, I get what I enjoy and works best for me.
  22. Like
    Mihle reacted to Glenwing in Question about color spaces   
    Color space information is not transmitted, generally speaking.
    It doesn't, you have to tell it what to do manually, through the monitor menu.
    The full color range is determined by your color space settings and is not affect by the color depth. If you set the display to DCI-P3 gamut, then the 8-bit value 255 for red will correspond to the maximum red intensity defined in the P3 gamut. If you set the display to sRGB mode, then red 255 will correspond to the maximum intensity of red defined in sRGB. Lower color depth will result in few steps between 0 and maximum intensity, so less granularity in selecting colors. But the range (minimum and maximum intensity) of each color is not affected by color depth.
    The color space setting in the monitor menu controls how the RGB values 0 to 255 are mapped to what output colors.
  23. Agree
    Mihle reacted to Skiiwee29 in How does it feel going from 27" 1440p display to 32"?   
    at that close of range sitting you will likely see pixel density issue and things being slightly more blurry and not as sharp as a result of stretching the pixels to fix a 32" size over 27". 27" is the recommended size for 1440p monitors for pixel density and sharpness. 
  24. Funny
    Mihle reacted to Electricity Taster in Company X sucks   
    Nice

  25. Informative
    Mihle reacted to GoodBytes in Bios boot time   
    Technically, it should be 5 to 7 sec. However, I believe only Intel ASRock boards (maybe other boards, but I am not certain) and OEMs can achieve this.
    OEMs can do it, because the hardware is fixed, and for AMD based systems, they can do some work in their custom UEFI to make it happen. Intel is able to make it happen, AMD in general, seems to have trouble delivering on that. AMD doesn't have Intel secret sauce yet. Intel based ASRock board can do it, because of the above, and also because it is the only board that actually deliver 0sec POST delay, when you set it to 0sec with the "Ultra fast" option, added to the "Fast Boot" option. Other motherboard manufacture tend not to implement this, because if the user needs to go in the UEFI, they need a physical button on the system, or go through Windows to make it restart in the UEFI. If the board doesn't have a physical button and Windows is broken, then their only choice is to clear CMOS. This increases support call, and probably don't want to deal with that. And a "Go to UEFI" button is apparently too costly. PLEASE NOTE:
    The above boot/startup time is only achievable with Windows Fast Startup (Win8 and up) featured enabled (on by default), and only works when the system is shutdown. Restarts cannot use this feature, and so the startup time will always be slower. And Windows Fast Startup only works when hibernation is enabled.
     
    PLEASE NOTE 2:
    HDD slows boot process. Even if you don't have your boot loader on it, the HDD needs to respond to the UEFI and that takes time. And so, real fast startup can only be achieved by SSDs (faster, the better).
     
    PLEASE NOTE 3:
    UEFI mode needs to be enabled (if you have the option, else assume it is enabled), and CSM must be disabled. Else, the UEFI goes into a BIOS of old emulation mode, and it doesn't support the smartness of the UEFI, making the boot process long and tedious. If this configuration is wrong, you will not be able to boot into your OS once corrected. Your drive format would need to be converted from MBR (only BIOS can interact with it), to GPT (only UEFI can interact with it).
     
    If that is the case, backup all your data first, and you can use Windows 10 (and up) built-in command line utility called mbr2gpt, which helps you convert your drive so that you can change/correct the option in your UEFI at next restart. They are many guides online and this forum too. https://linustechtips.com/topic/1351105-convert-your-boot-drive-from-mbr-to-gpt-for-uefi/
     
     
     
×