Time to move table to new tablespace

[Jason Buberel <jason@xxxxxxxxxxxxxxxxx>]

I'm considering the migration of an existing large (2.3TB) table to a new tablespace. The table size, according to the '\dt+' command:

 public | city_summary | table | altosresearch | 2345 GB    | 

Are there any considerations - besides the usual disk and network IO constraints - that I need to take into account when estimating the amount of time that would be required for the following commands to complete?

psql> create tablespace 'newstorage' location '/some/new/path';

psql> alter table city_summary set tablespace = 'newstorage';

Any other recommendations are welcome, such as "You are an idiot for not using partitioning in the first place" :)

--
Jason L. Buberel
CTO, Altos Research
http://www.altosresearch.com/

650.603.0907