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315 views

What parts of the filesystem to tmpfs/squashfs/sparseimage for USB live system

I want to create a live system on a USB key / SDCard with Linux Mint 14 (KDE or Debian Edition) that stores data persistently. The USB key needs to have at least one fat32 partition. As storage for ...
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xfs: writing to 17TB offset doesn't actually write it to specified offset

I have a situation wherein I want to write a few GBs at a very large offset - say 17TB. But when I use the dd command to do so, I notice that the filesystem is doing some kind of optimization - sparse ...
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85 views

Creating a sparse (automatically expanding and contracting) swap file with hole-punching support

I have this crazy idea, and want to know the pitfalls of such an approach (or whether it can even work with no deadlocks.. etc). The goal is to create an automatically expanding and contracting ...
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23 views

Create and use sparse file as non-privileged user

Here is my setup: I am non-privileged user (non-root). I cannot use sudo, nor I can use any other command to switch to root (e.g. su), or run commands as root. As a consequence, I cannot modify the ...
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67 views

How to throttle system resources during transfer from btrfs on file image on cifs mount?

I have a btrfs on a sparse file image (4TB) on a cifs mount of a remote NAS (Synology DS214) with zlib compression enabled. Transferring file from and onto the btrfs causes freezes of Linux (where it ...