![]() You are doing performance testing and you don't want disk I/O to be a factor (SSD write times can vary a lot).The files you are working with are sensitive (e.g.This is more efficient, but there may be times you want a pure RAM disk: To deallocate the RAM disk, umount it and delete the disk image: umount /ramdiskĪlthough tmpfs and ramfs are more efficient than using a block device, below are some of their downsides. The truncate command creates an empty file of a given size such that it is initialized (i.e. Mount /ramdisk-storage/ramdisk.img /ramdisk Truncate -s 4G /ramdisk-storage/ramdisk.img To deallocate the RAM disk, unmount it and remove the brd kernel module: umount /ramdiskĪlternatively, you can create a block device inside of ramfs: mkdir /ramdisk-storage /ramdisk )) syntax lets you do arithmetic in the shell. The rd_size parameter is size in kilobytes. The rd_nr parameter specifies how many RAM disks to create (by default, it creates 16, i.e. To create and initialize a 4GB RAM disk: mkdir /ramdisk But it takes more steps to set up, and uses RAM less efficiently. This approach is more predictable since it creates a real ext4 filesystem and never exceeds the limit you specify. On recent Ubuntu versions, this device does not exist by default, but can be created via modprobe brd. However, they are quite expensive, so this is probably only feasible if you absolutely need RAM-level speeds for your work.Besides tmpfs and ramfs, another option is the /dev/ram0 block device. They contain batteries to prevent data loss. This type of drive uses RAM modules instead of traditional SSD modules. Another option for taking advantage of this is looking into purchasing a RAM-based solid-state drive. This way, if there’s a surge or power outage, you’ll be able to shut down your computer safely without losing data. In addition, if you aren’t using a laptop with a strong battery, you should hook up your PC or laptop to a UPS. Luckily, ImDisk pretty much takes care of this. You will need to ensure that data stored on your RAM disk is backed up to an image, of course. A RAM disk can provide the necessary read/write speeds. Statistical modeling: this requires access to data at high speeds.Imagine how smoothly your games would run if you did this. Gaming: if you have a lot of RAM, you can run some games from your RAM disk.Video and photo editing: these processes can be resource-intensive, and more traditional means of storage can create a bottleneck slowing them down.However, with between 8GB and 32GB of RAM, you can do some useful things. In most cases, it isn’t feasible to buy more RAM simply to have a bigger RAM disk. It shows up in Windows File Explorer just like any other drive. You can access and use it just like any normal hard drive. Depending on your use case, that may be disappointing or unusable. ![]() Basically, the drive would act much more like RAM and much less like a disk. It would also disable the RAM drive’s ability to load the previous content. ![]() If you don’t, the contents of your RAM drive will be erased completely every time, with no saved image storage. This will also allow ImDisk to save your RAM drive’s data to an image file when you shut down your computer. With Fast Startup off, boots may take slightly longer, but it’s doubtful that you’ll notice much.ĭisabling fast startup will satisfy the warning window, but let’s consider why. As you may guess, this could mess with your RAM drive’s ability to preserve and track its data. This happens when the computer writes the contents of your RAM to a stable hard drive. Fast Startup speeds up the process of turning on your computer by saving a system state between completely off and hibernation to your hard drive. ![]()
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