[Tilesathome] Proposal: Keeping tileset as one file

[Dirk-Lüder Kreie]

Florian Lohoff schrieb:
> On Fri, Jun 06, 2008 at 07:24:20PM +0200, Frederik Ramm wrote:
>> Hi,
>>
>>> The advantage is that writing articles to a storage means only appending
>>> or linear overwriting of the containers storage and expiring the old
>>> locations. Thing about a log structured filesystems.
>> I don't understand this argument. You argue that filesystems cannot
>> be trusted to do efficiently what they were designed to do, and that
>> we would be better of coding something of our on on top?
> 
> Yep - most filesystems are written to be multipurpose. To have a mix of
> large and small files as in your homedirectory. Having thousands or
> millions of small files in one or thousands of directory
> is not a topic which filesystems get optimized for.

Instead of proclaiming a bottleneck, why not show us?

Things I can see in favor of these aggregated files would be that you 
would probably need to look at most at 4 of these on any higher 
zoomlevel (~z14 and up) to get a whole area out of them.

Sadly I don't have any statistics on the workload and/or bottlenecks we 
encounter *serving* the tiles, I only know of the bottleneck of 
uploading the tiles, which is getting the data onto the target disks.
I remain unconvinced that this method you propose would do much.
So let me reiterate:

Show us.

-- 

Dirk-Lüder "Deelkar" Kreie
Bremen - 53.0952°N 8.8652°E


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