[Tiling] Tilestore Benchmarks

[Oliver Tonnhofer]

On 02.05.2011, at 16:45, Oliver Tonnhofer wrote:

> 
> On 02.05.2011, at 16:05, Steven M. Ottens wrote:
>> Any idea if the speed increase on reading tiles from an SQLite database is due to a better caching of tiles/tilelocations? I find it interesting that reading from the database has a much steeper curve than straight from disk. I would have assumed that disk management should be able to cache the file-location-table.
> 
> 
> I think it's because of the deep nesting of the TileCache directory structure and that the internal inode/directory caches fill up. But that's just guessing. 

Ok, I ran some tests again and the FS cache is just 'warming up' much slower than the SQLite cache. It finally peaked at 20k tiles/s after 400 runs of 16k requests, and was constantly around 21k after 600 runs. 

Regards,
Oliver

-- 
Oliver Tonnhofer    | Omniscale GmbH & Co KG    | http://omniscale.de
http://mapproxy.org | https://bitbucket.org/olt | @oltonn