[Geoserver-devel] [JIRA] (GEOS-7141) Document "Tile locking mechanism" on "Cached Defaults" page

GeoServer GeoServer Developer
1

Mike Pumphrey created an issue

GeoServer / TaskGEOS-7141

Document “Tile locking mechanism” on “Cached Defaults” page

Issue Type:

TaskTask

Affects Versions:

2.7.2

Assignee:

Kevin Smith

Components:

Documentation

Created:

04/Aug/15 11:43 PM

Fix Versions:

2.7.3

Priority:

LowLow

Reporter:

Mike Pumphrey

This page is lacking info about the “Tile locking mechanism” setting:

http://docs.geoserver.org/latest/en/user/webadmin/tilecache/defaults.html

Kevin, Ben described it as thus:

“”"
GeoWebCache needs to keep track of what file operations are currently ongoing, so that two simultaneous operations do not interfere with one another. By default, GeoWebCache uses in-memory locks since it knows what it is doing. However, if there are two GeoWebCache instances sharing a single on-disk cache, they won’t know what the other is doing and there is the risk of a collision.

The alternative, NIO locking, uses the filesystem’s own locking to prevent simultaneous access. This is a little bit slower, but ensures safety with greater than one GeoWebCache instance.
“”"

If this looks good to you, feel free to reassign and I’ll add it in.

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