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diff --git a/health/guides/btrfs/btrfs_metadata.md b/health/guides/btrfs/btrfs_metadata.md deleted file mode 100644 index 6c44ee09b..000000000 --- a/health/guides/btrfs/btrfs_metadata.md +++ /dev/null @@ -1,70 +0,0 @@ -### Understand the alert - -The `btrfs_metadata` alert calculates the percentage of used Btrfs metadata space for a Btrfs filesystem. If you receive this alert, it indicates that your Btrfs filesystem's metadata space is being utilized at a high rate. - -### Troubleshoot the alert - -**Warning: Data is valuable. Before performing any actions, make sure to take necessary backup steps. Netdata is not responsible for any loss or corruption of data, database, or software.** - -1. **Add more physical space** - - - Determine which disk you want to add and in which path: - ``` - root@netdata~ # btrfs device add -f /dev/<new_disk> <path> - ``` - - - If you get an error that the drive is already mounted, you might have to unmount: - ``` - root@netdata~ # btrfs device add -f /dev/<new_disk> <path> - ``` - - - Check the newly added disk: - ``` - root@netdata~ # btrfs filesystem show - ``` - - - Balance the system to make use of the new drive: - ``` - root@netdata~ # btrfs filesystem balance <path> - ``` - -2. **Delete snapshots** - - - List the snapshots for a specific path: - ``` - root@netdata~ # sudo btrfs subvolume list -s <path> - ``` - - - Delete an unnecessary snapshot: - ``` - root@netdata~ # btrfs subvolume delete <path>/@some_dir-snapshot-test - ``` - -3. **Enable a compression mechanism** - - Apply compression to existing files by modifying the `fstab` configuration file (or during the `mount` procedure) with the `compress=alg` option. Replace `alg` with `zlib`, `lzo`, `zstd`, or `no` (for no compression). For example, to re-compress the `/mount/point` path with `zstd` compression: - - ``` - root@netdata # btrfs filesystem defragment -r -v -czstd /mount/point - ``` - -4. **Enable a deduplication mechanism** - - Deduplication tools like duperemove, bees, and dduper can help identify blocks of data sharing common sequences and combine extents via copy-on-write semantics. Ensure you check the status of these 3rd party tools before using them. - - - [duperemove](https://github.com/markfasheh/duperemove) - - [bees](https://github.com/Zygo/bees) - - [dduper](https://github.com/lakshmipathi/dduper) - -5. **Perform a balance** - - Balance data/metadata/system-data in empty or near-empty chunks for Btrfs filesystems with multiple disks, allowing space to be reassigned: - - ``` - root@netdata # btrfs balance start -musage=50 -dusage=10 -susage=5 /mount/point - ``` - -### Useful resources - -1. [The Btrfs filesystem on Arch Linux website](https://wiki.archlinux.org/title/btrfs) -2. [The Btrfs filesystem on kernel.org website](https://btrfs.wiki.kernel.org)
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