Often a single object or page may become stale, such as when a website is updated. Rather than invalidate or expire all objects from Avi Load Balancer’s HTTP content cache, only the impacted items should be invalidated. When the virtual service and pool are running on redundant or scaled-out SEs, purging the object from the cache will be performed on all applicable SEs for the pool.
The following commands show how to perform this action from the CLI.
Procedure
- Check to see if the desired object exists within the cache. The truncated example below returns the stats from the object found in the cache.
: > show pool prod-l7-pool httpcache filter resource_name analytics.js
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URI: /path1/analytics.js
ctype: text/javascript
raw_key: pool-0-4]avinetworks.com:/path1/analytics.js
key: e6ce7ac2ab8668a8acc9f2d505281412
key_extn:
data_size: 146398 meta_size: 172 hdr_size: 414 body_size: 145984
date_time: 1449185388 last_mod_time: -1 etag: "-725089702"
(Thu Dec 3 23:29:48 2015) (Wed Dec 31 23:59:59 1969)
in_time: 1449187395 exp_age: 120 init_age: 2007 last_used:
(Fri Dec 4 00:03:15 2015) (Fri Dec 4 00:05:15 2015)
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- To clear the object from cache:
: > clear pool prod-l7-pool httpcache resource_name analytics.js
- Validate the object has been removed from cache:
: > show pool prod-l7-pool httpcache filter resource_name analytics.js
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