We are using 1.5TB hard disk and 128GB RAM machine for storing map data using nominatim. Now the OSM data is growing faster. If it needs more than 2TB means,how can it be handled? How it will affect the performance?

asked 03 Sep '14, 13:54

vjaikrishnan's gravatar image

vjaikrishnan
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How to do RAID configuration for a machine with 128GB RAM and more than 4TB hard disk? will it affect I/O performance?

(04 Sep '14, 06:20) vjaikrishnan

In Postgres you can move each table and index to a so called 'tablespace', which is a path in the file system. http://www.postgresql.org/docs/9.3/static/manage-ag-tablespaces.html

This way you can split the database onto several harddrives. The largest tables (planet_osm_ways, planet_osm_nodes, place) are all below 100GB.

I/O performance will probably be slightly better by using two harddrives.

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answered 28 Sep '14, 22:32

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mtmail
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question asked: 03 Sep '14, 13:54

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last updated: 28 Sep '14, 22:32

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