Symlink_blank tag not working for the map server when configured for Azure blob

[kavinder-Gupta]

We have configured Azure blob to save and receive the tiles cache from the map server. Below is the code that we have configured for the same in the map server configuration file.

<cache name="azure" type="azure">
<url>[https://foo.blob.core.windows.net/tiles/{tileset}/{grid}/{z}/{x}/{y}/{ext}</url>](https://foo.blob.core.windows.net/tiles/%7Btileset%7D/%7Bgrid%7D/%7Bz%7D/%7Bx%7D/%7By%7D/%7Bext%7D%3C/url%3E)
<headers>
<Host>foo.blob.core.windows.net</Host>
</headers>
<id>foo</id>
<secret>foobarcccccccccccccccccccccyA==</secret>
<container>tiles</container>
<symlink_blank>on<symlink_blank/>
</cache>

The symlink_blank tag which we have used for the detect_blank option is not working for the Azure blob. The empty tiles are not getting generated as expected, but the symlink is also not getting created, as a result of which, the overall process is taking too long for execution.
In the case of disk cache, the map server configuration file is getting configured and only one empty tile is getting generated.

\\10.91.1.14\Data\MapServerData\MapCacheTiles\FEMA_FHZ\4.52 on 3

We use symlink_blank and detect_blank options to create the symbolic links for the empty tiles without saving empty tiles.