mitchell852 commented on issue #2009: Traffic Portal Snapshot Diff button to 
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URL: 
https://github.com/apache/incubator-trafficcontrol/issues/2009#issuecomment-373486686
 
 
   that sounds like a good idea. in the interim, you can search for ++ or --
   
   but yes, the CRConfig.json can get very large and the diff is simply a diff 
(performed in the browser in TP) between the current CRConfig.json and what a 
new CRConfig.json will look like (after snapshotting). 
   
   in fact, the CRconfig.json at comcast was so big, the browser could not 
handle it all so i created a setting in traffic_portal_properties.json called 
snapshot.diff.context that dictates how much context (in lines) is given around 
a change. for example, if you set that to 10, you'd get 10 lines before and 
after a change. however, it's hard to determine how much "context" is required 
to truly understand the change. 10 probably wouldn't do it. anyhow, that 
setting can help you limit the size of the diff in TP.

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