kangpinghuang commented on issue #779: reader will failed because the version is compacted URL: https://github.com/apache/incubator-doris/issues/779#issuecomment-492045007 this problem will be solved by using the following mechanism(deferred delete mechanism): 1. add a delete flag field and delete_time field to the rowset 2. delete rowset will not be added unused rowsets queue. It will be reserved for a peroid(eg: 10 minutes, can be configured by config) so that the late reader with the old version will get the old version rowset. 3. Tablet will manage a extra deleted rowsets queue and will check the queue periodically to move the timeout rowsets in the deleted rowsets queue to the unused rowsets in StorageEngine. 4. One point to figure out is that make sure the rowset version can be obtained from version graph and can be aquired through tabblet's get_rowset api.
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