Red Hat Bugzilla – Bug 1298266
Recommended values for tiering : minfree disk and water mark
Last modified: 2018-01-23 04:06:53 EST
We need to document the recommended values for minfree disk and water mark (high and low) to ensure the hot tier is never full.
Hot tier getting full has lead to lot of issues during testing.
Section Number and Name:
Describe the issue:
Suggestions for improvement:
Please provide the recommended values
Believe 90% is the right number for both the watermark and min-free-disk. Will confirm with team.
Yes, in the tiering chapter, we could say those are the default values and the ones Red Hat recommends. Assuming these numbers work with PM and dev.
Options "cluster.watermark-hi" and "cluster.watermark-low" is already documented . The default value for "cluster.watermark-hi" is 90% and allowed values are 1-99%. The default value for "cluster.watermark-low" is 75% and allowed values are 1-99%.
"cluster.min-free-disk" is already documented .
The recommended values will usually be the default values. Do we still need to add a note that the default values are the recommended values?
Also, please let me know if I have to document any other option.
I was answering the NEEDINFO for comment #2. I do not think we need to modify the documentation given comment #6. Can this bug be closed ?
Raising a Need_Info on Vivek (Bug Reporter) to review Comment 3, Comment 6 and Comment 7 and then close the bug.
Well this was an AI on me from one of the calls, Bhaskarkiran followed up and hence I filed this. We can close this, if the same is documented else where.
Based on Comment 9, raising need_info on Bhaskarkiran.
Could you review the comments in the bug and share your thoughts.
Since we have not received any new values for both. we can close this out.
Based on Comment 11, closing this bug.