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The living room media/gaming machine at home is an 8 terabyte spinning rust. I didn't bother with a separate SSD boot partition.

It's currently been running for 23 days. Booting takes ~15 seconds even on spinning rust for a reasonable linux distro, so I'm not going to stress about those 15 seconds every couple of months.

               total        used        free      shared  buff/cache   available
Mem: 31Gi 4.6Gi 21Gi 158Mi 5.1Gi 25Gi

Swap: 37Gi 617Mi 36Gi

5.1 gigabytes mostly just file cache. As a result, everything opens essentially instantly. For a bit better experience, I did a:

find ~/minecraft/world -type f -exec cat {} > /dev/null \;

to forcibly cache that, but that was all I did.




Hah, if you can fit the whole OS plus running applications easily in RAM, and you don't boot often - fine. But you're basically doing the same thing but with extra steps :P


Well, RAM is significantly faster than even SSD, and now I don't have to muck about w/ a 2nd drive :)

Not to mention the spinning rust is cheaper.


Sure, but that RAM isn't :)

I can get a 60gb ssd for under 20 bucks (I just checked 18.99 on amazon - even I'm a little surprised at how cheap that is)

That 32gb of ram is at least a crisp hundred (which also - fucking mind blowing. First time I ever added a part to a PC, it was to add 256mb of ram, and that was huge deal)


Yes, but the RAM is mostly for the gaming. It means I can easily switch between snappy desktop orrr burning a bunch on minecraft worlds and clients or whatever random game is out there. So. A lot more useful than an SSD ;)

Also I'd be concerned about any SSD you can get for that price.

And, frankly, you don't need that much RAM to have a pleasant desktop experience. Most of that is just for the gaming. Just a gig or two of file cache for the hot stuff. Which is what your OS usually does anyway.

The tower my workplace bought me is also spinning rust, and they for some reason put an enormous amount of RAM in it too. Only 5 gigs are actually being used for caching. The OS can't figure out what to do with the rest after having, I suppose loaded browser (few hundred megs), VMWare, OpenOffice etc. Even if I was running something more bloaty than Mate I doubt I could find a way to burn more than another gigabyte :)


I mean... at the risk of asking a loaded question - have you tried an ssd?

Because, I'm also spoiled on RAM so I don't have to pick, but if I haaad to pick - I'd take a machine with 8gb of RAM and an SSD over 32gb of RAM and an HDD almost any day (actually - literally any day except when I'm running our full service stack at work, which needs about 12gb of RAM to be workable)

If I have a bunch of media - sure, throw it on a spinning 2tb drive or something. I'm not saying don't use cheap storage, I'm just saying... try the SSD. It costs about the same as coffee for the week.


Yep. All the laptops in the house are SSD. I really haven't noticed much of a difference, sorry.

Everything is linux too, but I find it hard to believe that would matter. I mean, NTFS is a notoriously slow file system (Hedgewars, Firefox and Minecraft all had to rearchitect to handle its horrendous handling of many small files), but the reasons for it I think would not change that much with SSD.

The thing is. How would you really notice a difference after first load of an app? SSD, spinning rust, linux, everything is mem caching these days... It's really hard to tell unless you're actually memory constrained.

It's quite likely that if I had to work on an enormous number of new files, I might notice something? But my software projects aren't like that - the games and videos are, but they wouldn't fit on an SSD anyway. That's why I have an 8 terabyte hard drive.


Alright, fair enough - we might just have fairly different workloads.

I absolutely notice a pretty major difference. If you don't - hey, if it's not broken, don't fix it I guess.


As I think about this, maybe it really is a Windows vs Linux thing. On raw read speeds, SSD is only about 2-3x faster than HDD. This is barely noticeable compared to the speed from RAM, or for almost anything you could reasonably launch. (Videos are huge, but those are basically streamed anyway)

But, random access reads of many small files scattered across the disc, obviously SSD will do much better. Sequential reads (large files, non-fragmented filesystem) it's not so clear.

Maybe it's simply that Linux, as well as being better at file caching and not wasting RAM, is also better at not being fragmented. Perhaps I have my OS filesystems to thank for my indifference.

On that front I guess it's also saving me money by allowing me to enjoy ginormous cheap discs :)


Hmmm another thought. Linux also (typically and traditionally) does a lot more library reuse thanks to the open source ecosystem. So, there's less DLL hell and fragmentation there. That could be another reason for my not noticing. Most of my system libraries that any random app needs are already loaded and ready for use after boot.


Yeah - you might be onto something there - I suspect fragmentation matters a lot for the spinning disks. If you've got huge disks in there, you probably have mostly sequential reads for just about everything.


I mean - I also run the ginormous cheap discs. I don't think anyone is saying to load your media library all onto an ssd, it just doesn't matter enough. But the OS/applications are a big deal.

And 2-3x faster is low. For my wife's machine, moving from a 5400rpm spinning disk to a relatively cheap samsung ssd made effective read times about 12x faster. Technically a 5400 rpm drive can do ~75mb/s, but that mostly ignores seek time, and assumes sequential reads. In reality, it was often doing less than 40mb/s. The SSD caps at about 540mb/s, but in reality it mostly does around 450.

It's the difference between having MS teams take ~5 seconds to load, vs more than a minute (locking most of the machine for that period as well).


I just launched Microsoft Teams for Linux on this spinning rust work machine here. It launched a meeting link (letting me into the room) in between 2 and 3 seconds (one-onethousand two-onethousand)

I last launched Teams on this machine a couple of days ago.

For a "fair" comparison (keep in mind, again, the whole point I was making that RAM dominates these days), I then ran:

sync; echo 3 > /proc/sys/vm/drop_caches

And launched Teams again. It opened in between 8-10 seconds with ALL OS caching of disc dropped.

I think what you're seeing here is Windows being helped along by SSD making it usable...

It reminds me of the change we made in Hedgewars. We had no idea it was taking 20-30 seconds to launch our gui in Windows since it opened instantaneously in Linux even with all caches flushed. We had to add lazy page loading to get reasonable performance on Windows - it was probably all about NTFS being insanely slow (and maybe crap at laying out data reasonably).

*Edit - I updated my time estimate upwards slightly for teams after testing the flush several times and my own counting skills.

The flush was also a good test of launching firefox, since I did it once between to update nightly, it also opened very quickly post flush. Barely noticeable delay.


I agree about this. SSD leads to impressively fast boot/early load times, and it might help if you have to run workloads that stress both RAM and I/O, but other than that it doesn't really matter if you're running a proper OS. And you can put a swap file/partition on a spinning disk without worrying about endurance or having less space for files. So the performance argument goes both ways, and the extra storage space of spinning rust is very convenient.


> First time I ever added a part to a PC, it was to add 256mb of ram, and that was huge deal

I remember the first memory stick I bought (a measly 4mb of RAM) and even wholesale via a friend who worked for a large PC repair shop, it was still $450 give or take.

Now 30 years later, my most recent memory purchase was eight 32gb ECC RDIMMs for about the same price. So not only did the amount of ram per dollar increase 64,000x, it’s also WAY faster and more resilient.


Linux still works OK on spinny disk (though exponentially worse every year as applications trend towards bloated Electron), but Win10 is nigh unusable on a spinny disk (technically works but very unpleasant). It works quite comfortably on ancient hardware though given a SSD and sufficient RAM.




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