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40 results

20170703130158_schedule_merge_request_diff_migrations.rb

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  • Sean McGivern's avatar
    f2d50af9
    Migrate MR commits and diffs to new tables · f2d50af9
    Sean McGivern authored 
    Previously, we stored these as serialised fields - `st_{commits,diffs}` - on the
`merge_request_diffs` table. These now have their own tables -
`merge_request_diff_{commits,diffs}` - with a column for each attribute of the
serialised data.

Add a background migration to go through the existing MR diffs and migrate them
to the new format. Ignore any contents that cannot be displayed. Assuming that
we have 5 million rows to migrate, and each batch of 2,500 rows can be
completed in 5 minutes, this will take about 7 days to migrate everything.
    f2d50af9
    History
    Migrate MR commits and diffs to new tables
    Sean McGivern authored 
    Previously, we stored these as serialised fields - `st_{commits,diffs}` - on the
`merge_request_diffs` table. These now have their own tables -
`merge_request_diff_{commits,diffs}` - with a column for each attribute of the
serialised data.

Add a background migration to go through the existing MR diffs and migrate them
to the new format. Ignore any contents that cannot be displayed. Assuming that
we have 5 million rows to migrate, and each batch of 2,500 rows can be
completed in 5 minutes, this will take about 7 days to migrate everything.
20170703130158_schedule_merge_request_diff_migrations.rb 955 B