diff options
Diffstat (limited to 'guides/source/asset_pipeline.textile')
| -rw-r--r-- | guides/source/asset_pipeline.textile | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/guides/source/asset_pipeline.textile b/guides/source/asset_pipeline.textile index e385ec4f17..2a15e95282 100644 --- a/guides/source/asset_pipeline.textile +++ b/guides/source/asset_pipeline.textile @@ -70,11 +70,11 @@ The query string strategy has several disadvantages: <ol> <li> - <strong>Not all caches will reliably cache content where the filename only differs by query parameters</strong>.<br> + <strong>Not all caches will reliably cache content where the filename only differs by query parameters</strong>.<br /> "Steve Souders recommends":http://www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/, "...avoiding a querystring for cacheable resources". He found that in this case 5-20% of requests will not be cached. Query strings in particular do not work at all with some CDNs for cache invalidation. </li> <li> - <strong>The file name can change between nodes in multi-server environments.</strong><br> + <strong>The file name can change between nodes in multi-server environments.</strong><br /> The default query string in Rails 2.x is based on the modification time of the files. When assets are deployed to a cluster, there is no guarantee that the timestamps will be the same, resulting in different values being used depending on which server handles the request. </li> <li> @@ -473,6 +473,7 @@ Precompiled assets exist on the filesystem and are served directly by your web s For Apache: <plain> +# The Expires* directives requires the Apache module +mod_expires+ to be enabled. <LocationMatch "^/assets/.*$"> # Use of ETag is discouraged when Last-Modified is present Header unset ETag |