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.\" Please adjust this date whenever revising the manpage.
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.SH NAME
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render_expired \- expires a list of map tiles so that they get re-rendered.
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.SH SYNOPSIS
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.Brender_expired
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.RI [ options ] <"expire.list"
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.SH DESCRIPTION
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This manual page documents briefly the
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.Brender_expired
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.Brender_expired
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is a helper utility that takes a list of map tiles from stdin and expires them such that they will get re-rendered.
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Render_expired has three potential strategies of how to expire map tiles:
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1) Render tiles directly: Render_expired can connect to the renderd socket and submit rendering requests for expired tiles directly
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2) Delete tiles: Render_expired can delete expired tiles from disk. The next time the tile then gets viewed it will get re-rendered, assuming a dynamic rendering setup like mod_tile is installed
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3) Mark tiles as dirty: A dynamic tile rendering system like mod_tile decides if a tile needs re-rendering by comparing the timestamp of the tile with the time of the planet-import-complet timestamp. Render_expired can set the timestamp of a tile back many years, ensuring it is older than the db import time, thus causeing the tile to be considered dirty and in need for re-render.
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These three strategies can be combined and applied at different zoom levels. E.g. Zoom level 17-18 get deleted, z11 - z16 get marked dirty and z6 - z10 get rendered directly.
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Render_expired takes a list of tiles from stdin which should be expired. The format of the list is one tile per line specified as z/x/y.
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render_expired will automatically expand the list to cover the effected tiles at other zoom levels.
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.SH OPTIONS
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This program follows the usual GNU command line syntax, with long
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options starting with two dashes (`-').
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\fB\-V\fR|\-\-version
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Print out the version number for render_expired
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.SH SEE ALSO
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.BR renderd(1),
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.BR mod_tile (1).
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.SH AUTHOR
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render_expire was written by OpenStreetMap project members.
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