June 2015
Intermediate to advanced
216 pages
4h 48m
English
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Optimizing btrfs for solid state drives
When creating a btrfs filesystem on multiple SSDs, using the single -m option will ensure that the metadata is not duplicated. On an SSD, duplicating metadata is thought of as a waste of space and has an overhead that can lessen the life of the disk, as shown in the following code:
# mkfs.btrfs -m single /dev/sdb
The second way is to use the ssd mount option. This option will set a few performance options:
- Allows large metadata clusters
- Allows more sequential data allocation
- Disables leaf writing to match key and block order in the b-tree database
- Commits b-tree log fragments without batching multiple processes