Bootstack Charmers Next Bcache Tuning

You will need Juju 2.9 to be able to run this command. Learn how to upgrade to Juju 2.9.

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Channel	Version	Revision	Published	Runs on
latest/stable	2	2	18 Mar 2021	Ubuntu 20.04 Ubuntu 18.10 Ubuntu 18.04 Ubuntu 16.04

Platform:

20.04 18.04 16.04 18.10

Helper charm for tuning of bcache block devices Read more

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This charm performs best-practice performance tuning of bcache devices on SD/NVMe based installations.

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

Disable writethrough of sequential data writes:

sequential_cutoff: 0

Increase the amount of dirty data the cache device will hold before starting to persist to the backing device:

writeback_percent: 10

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

This charm presents no configuration options.