Zhong Yanghong created KYLIN-3335:
Summary: Add project & cube related info to the job id for better
Issue Type: Improvement
Reporter: Zhong Yanghong
Currently it's painful to search cube or project related jobs, since those
infos are hidden in values. Especially, when users want to list job in a period
under one project, by current design, all of the job output info have to be
read into memory. If this kind of operation is very often with a short period,
it's easy to get OOM.
If the job id is prefixed with project and cube names, then we can push down
prefix filters, which is efficient and safe.
This kind of change will cause backward compatibility issue. There're two ways
to deal with this:
* Set a milestone with time tag, if a search relates to data earlier than this
time, then just need to do one scan with prefix filter. Otherwise, two scans
are needed. One with prefix filter and the other use current strategy. As time
goes on, old job infos will be deleted. Once there's no data older than the
time, only one scan is needed.
* Do migration for the old data once.
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