On 10/6/22 05:36, Jaroslav Pulchart wrote:
I apply the echo 0 > /sys/block/vdc/queue/wbt_lat_usec at the production servers. I expect it will disable wbt. Could you please confirm that my expectation is correct?
Hi Jaroslav, I have no experience with WBT. But what I found in the documentation seems to confirm that the above command is sufficient to disable WBT: What: /sys/block/<disk>/queue/wbt_lat_usec Date: November 2016 Contact: linux-block@xxxxxxxxxxxxxxx Description: [RW] If the device is registered for writeback throttling, then this file shows the target minimum read latency. If this latency is exceeded in a given window of time (see wb_window_usec), then the writeback throttling will start scaling back writes. Writing a value of '0' to this file disables the feature. Writing a value of '-1' to this file resets the value to the default setting. Best regards, Bart.
