WingsGo edited a comment on issue #3402:
URL: 
https://github.com/apache/incubator-doris/issues/3402#issuecomment-621145565


   Hi, @morningman I found that CheckDataSizeQuota will only check by logic but 
not check by real disk usage.I have some questions:
   1. One solution is get real disk space avaliable group by storage medium, 
and check is there are avaliable space for specify storage medium  when create 
or alter table/partition, But the solution has a problem that it may cannot 
constrain the existing partition, so, we should separate the FE's High 
Watermark into two aspect, for example hdd_storage_high_watermark_usage_percent 
&& ssd_storage_high_watermark_usage_percent?
   2. should we refacor the checkDataSizeQuota logic  to limit the quota by 
real usage?


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