Getting Started
To use this charm, simple deploy and relation to principle services:
juju deploy bcache-tuning
juju add-relation bcache-tuning ceph-osd
juju add-relation bcache-tuning nova-compute
Cache Set Configuration
Disable performance based congestion behaviour - the SSD or NVMe will in all likelyhood always be faster than the underlying spindle:
congested_read_threshold_us: 0
congested_write_threshold_us: 0
Bcache Backing Device Configuration
Disable cache readahead:
readahead: 0
Disable writethrough of sequential data writes:
sequential_cutoff: 0
Set the amount of dirty data the cache device will hold before starting to persist to the backing device:
writeback_percent: 10
Sets unmanaged cache_mode:
cache_mode: unmanaged