MapGuide RFC 90 - Meta Tiling Support

This page contains an change request (RFC) for the MapGuide Open Source project. More MapGuide RFCs can be found on the RFCs page.

Status

RFC Template Version	(1.0)
Submission Date	(Date/Time submitted)
Last Modified	(your name here) Timestamp
Author	(your name here)
RFC Status	(draft)
Implementation Status	(pending)
Proposed Milestone	(2.2)
Assigned PSC guide(s)	(when determined)
Voting History	(vote date)
no vote

Overview

Add support internally to the MapGuide Server Engine to render larger tiles and then slice them up into the normal tile sizes

Motivation

It's much efficent to render one large tile than many small ones.

Proposed Solution

Add a meta tile factor to the tile service, which then will render larger tiles and then slice them up into the smaller tiles which get served to clients.

Implications

The current approach with polling for lock files is inefficent and is excaerbated by meta tiling. When using a meta tiling factor of 4, 15 tiles will wait and poll for 1s while the meta tile is rendered and sliced up.

Changing to a mutex would help

Test Plan

TBD

Funding/Resources

TBD