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Difference between revisions of "Btrfs/en"
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= Btrfs maintenance = | = Btrfs maintenance = | ||
Btrfs needs maintenace like every filesystem. The more you use advanced features of btrfs, the more you have to watch for the right maintenance. | Btrfs needs maintenace like every filesystem. The more you use advanced features of btrfs, the more you have to watch for the right maintenance. Please also have a look at [[Btrfs Maintenance|Btrfs_Maintenance]] | ||
=== Fragmentation === | === Fragmentation === | ||
Files on btrfs tend to get somewhat fragmented, when they are appended or changed often. If you use a mechanical disk with slow seeks, it may be advisable to defragment some heavy used files from time to time (like once in a month). | Files on btrfs tend to get somewhat fragmented, when they are appended or changed often. If you use a mechanical disk with slow seeks, it may be advisable to defragment some heavy used files from time to time (like once in a month). | ||
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There is an '''easy and secure way''' to move a volume to another disk/device. If you use Btrfs itself to move the volume, there will be no danger. You even can do this '''while the volume is in use'''. | There is an '''easy and secure way''' to move a volume to another disk/device. If you use Btrfs itself to move the volume, there will be no danger. You even can do this '''while the volume is in use'''. | ||
* Create the partition you want to use as ''destination'' '''without formatting''' it. Or remove the filesystem when one is present | * Create the partition you want to use as ''destination'' '''without formatting''' it. Or remove the filesystem when one is present | ||
* Add the ''destination'' device to your volume by {{RootCmd|command=btrfs device add /dev/[destination]}} | * Add the ''destination'' device to your volume by {{RootCmd|command=btrfs device add /dev/[destination] [path to filesystem]}} | ||
* Remove the ''source'' device from your volume by {{RootCmd|command=btrfs device remove /dev/[source]}} | * Remove the ''source'' device from your volume by {{RootCmd|command=btrfs device remove /dev/[source] [path to filesystem]}} | ||
Btrfs will notice, that it is necessary for this setup to move all data from the source device to the destination device. And it will start immediately to move data in the background. Meanwhile you can use your PC as you want. | Btrfs will notice, that it is necessary for this setup to move all data from the source device to the destination device. And it will start immediately to move data in the background. Meanwhile you can use your PC as you want. | ||
* Empty Blocks will not be moved | * Empty Blocks will not be moved | ||