Hello,
Previously, caching was disabled on our proxy servers. Now we need to cache some content (files about 10 MB in size).
So we changed the squid.conf:
#Disable caching
#cache deny all
#no_cache deny all
#cache_mem 0
cache_dir ufs /data/squid/cache 32000 16 256 max-size=12000000
#no_cache deny all
#cache_mem 0
cache_dir ufs /data/squid/cache 32000 16 256 max-size=12000000
We have 24 workers on each proxy.
We saw that some requests were taken from the cache, and some were not.
The documentation says:
"In SMP configurations, cache_dir must not precede the workers option and should use configuration macros or conditionals to give each worker interested in disk caching a dedicated cache directory."
I found Amos' comment that "rock cache type *is* SMP-aware" (http://lists.squid-cache.org/pipermail/squid-users/2018-October/019410.html)
So we switched to a rock cache_dir:
cache_dir rock /data/squid/cache 32000 max-size=12000000
Now everything seems to be working fine in the test environment, but I found limitations on the RockStore (https://wiki.squid-cache.org/Features/RockStore):
"Objects larger than 32,000 bytes cannot be cached when cache_dirs are shared among workers."
Does this mean that RockStore is not suitable for caching large files?
Should I switch back to the UFS and configure 24 cache_dirs (this will lead to a significant consumption of disk space)?
Kind regards,
Ankor
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