![]() In the most simple case, to create a 1GB ( -o size=1g) RAM drive and mount it on /mnt/ramdisk, we can use mount.tmpfs (virtual memory filesystem): $ mkdir /mnt/ramdisk They allocate part of the physical memory and mount it on the filesystem. RAM drives are used to speed up operations with especially big files. In that case, we can use a special approach to leverage whole file buffering - a RAM drive. When plenty of RAM is available for the file we want to work with, the bottleneck will only be disk IO. Using these editors might be the best choice due to performance reasons: they’re much faster than using a (disk-based) swap. Some commonly used editors require the whole file to fit in physical memory: ![]() Of course, the network packets during transfer employ the same strategy.Īs we’ll see below, we can leverage the same idea for reads and seeks. ![]() For example, files can be automatically split during transfer. rwxrwxrwx 1 x x 12G Aug 01 00:00 rejoinedhugefile Similarly, after we finish processing, we can rejoin the chunks via cat (concatenate) and redirection: $ time cat x* > rejoinedhugefile Splitting into 50MB chunks ( –bytes=50M), we get multiple full 50MB files and one 39MB file. rwxrwxrwx 1 x x 12G Aug 01 00:00 hugefileīefore the split, we can see the file was around 12GB. rwxrwxrwx 1 x x 12G Aug 19 12:53 hugefile We can just temporarily split the file in question: $ ls -lh That doesn’t necessarily mean permanently restructuring data. The most basic way of dealing with huge files is to not have them in the first place.
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