Hi, Anyone can help on this? Regs, Icy On Tue, 12 May 2020 at 10:44, icy chan <icy.kf.chan@gmail.com> wrote:

Hi,

I had configured a cache tier with below parameters: cache_target_dirty_ratio: 0.1 cache_target_dirty_high_ratio: 0.7 cache_target_full_ratio: 0.9

The cache tier did improved the performance much. And I am targeted to keep the cache tier with only 10% of dirty data. Remaining data ( 80% ) are clean and ready for evict. I don't want the cache tier enter high flushing state which impacting the performance. Are there any methods to keep track the dirty ratio of target cache tier? Which I can plan for adding more OSDs if the dirty ratio keep floating around 50~70%

Regs, Icy