Nikk Anderson <Nikk.Anderson@parallel.ltd.uk> writes:
> As our backend systems are writing hundreds of rows of data in per minute
> into the table that needs clustering - will cluster handle locking the
> tables when dropping the old, and renaming the clustered data? What happens
> to the data being added to the table while cluster is running?
Nothing, because there won't be any: cluster acquires exclusive lock on
the table while it runs. Any would-be inserter will block till it's done.
If you are clustering by timestamp of insertion, and you never update or
delete rows, then I think it's a one-time-and-you're-done kind of task
anyway --- newly inserted rows will always get added at the end, and so
will be in timestamp order anyway. But if you need to update the table
then things aren't so nice :-(
regards, tom lane
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