Cache Notes: Difference between revisions

Revision as of 18:29, 13 July 2010

Here are some things we can investigate to gain more information about the current state of the cache:

Determine what the cache's average hit rate is.
See how performance varies by increasing the cache size.
Look into whether YouTube files are blowing out the cache.
Run a Test Pilot or a smaller experiment to gather user cache data
- In order to gather info on the previous bullet points

Here are some ideas for improving the cache that need to be investigated:

Consider other eviction options
- Prioritize by file type, giving css and js higher priority
- Evict based on frecency, not just recency (frequency + recency)
- Use Adaptive Replacement Cache algorithm: http://en.wikipedia.org/wiki/Adaptive_replacement_cache

Keep dimensions of evicted img files, so layout can still render before the image data arrives across the network
Compress cache entries?
- This could save space and improve I/O time

Here are some links with other documentation on the cache.

Here is a list of bugs filed on the cache. Many are resolved.

@@ Line 16: / Line 16: @@
 **Use Adaptive Replacement Cache algorithm: http://en.wikipedia.org/wiki/Adaptive_replacement_cache
-*Keep dimensions of evicted img files, so layout can still render
+*Keep dimensions of evicted img files, so layout can still render before the image data arrives across the network
+*Compress cache entries?
+**This could save space and improve I/O time
 == List of Other Cache Resources ==