[
https://issues.apache.org/jira/browse/TS-4707?focusedWorklogId=28743&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-28743
]
ASF GitHub Bot logged work on TS-4707:
--------------------------------------
Author: ASF GitHub Bot
Created on: 11/Sep/16 02:24
Start Date: 11/Sep/16 02:24
Worklog Time Spent: 10m
Work Description: Github user jpeach commented on a diff in the pull
request:
https://github.com/apache/trafficserver/pull/834#discussion_r78286892
--- Diff: proxy/ParentConsistentHash.cc ---
@@ -63,21 +66,104 @@ ParentConsistentHash::getPathHash(HttpRequestData
*hrdata, ATSHash64 *h)
{
const char *tmp = NULL;
int len;
- URL *url = hrdata->hdr->url_get();
+ URL *url = hrdata->hdr->url_get();
+ int num_dirs = 0;
+
+ // Use over-ride URL from HttpTransact::State's
cache_info.parent_selection_url, if present.
+ URL *ps_url = NULL;
+ Debug("parent_select", "hrdata->cache_info_parent_selection_url = %p",
hrdata->cache_info_parent_selection_url);
+ if (hrdata->cache_info_parent_selection_url) {
+ ps_url = *(hrdata->cache_info_parent_selection_url);
+ Debug("parent_select", "ps_url = %p", ps_url);
+ if (ps_url) {
+ tmp = ps_url->string_get_ref(&len);
+ if (tmp && len > 0) {
+ // Print the over-ride URL
+ Debug("parent_select", "Using Over-Ride String='%.*s'.", len, tmp);
+ h->update(tmp, len);
+ h->final();
+ return h->get();
+ }
+ }
+ }
// Always hash on '/' because paths returned by ATS are always stripped
of it
h->update("/", 1);
tmp = url->path_get(&len);
- if (tmp) {
+
+ if (tmp && len > 0) {
+ // Print the Original path.
+ Debug("parent_select", "Original Path='%.*s'.", len, tmp);
+
+ // Process the 'maxdirs' directive.
+ if (max_dirs != 0) {
+ // Determine number of directory components in the path.
+ // NOTE: Leading '/' is gone already.
+ for (int x = 0; x < len; x++) {
+ if (tmp[x] == '/')
+ num_dirs++;
+ }
+ // If max_dirs positive , include directory components from the left
up to max_dirs.
+ // If max_dirs negative , include directory components from the left
up to num_dirs - ( abs(max_dirs) - 1 ).
+ int limit = 0;
+ if (max_dirs > 0)
+ limit = max_dirs;
+ else if (max_dirs < 0) {
+ int md = abs(max_dirs) - 1;
+ if (md < num_dirs)
+ limit = num_dirs - md;
+ else
+ limit = 0;
+ }
+ if (limit > 0) {
+ int x = 0;
+ int count = 0;
+ for (; x < len; x++) {
--- End diff --
```C
for (int x = 0; x < len; ++x) { ... }
```
Issue Time Tracking
-------------------
Worklog Id: (was: 28743)
Time Spent: 9h 10m (was: 9h)
> Parent Consistent Hash Selection - add fname and maxdirs options.
> -----------------------------------------------------------------
>
> Key: TS-4707
> URL: https://issues.apache.org/jira/browse/TS-4707
> Project: Traffic Server
> Issue Type: Improvement
> Components: Parent Proxy
> Reporter: Peter Chou
> Assignee: Peter Chou
> Fix For: 7.0.0
>
> Time Spent: 9h 10m
> Remaining Estimate: 0h
>
> This enhancement adds two options, "fname" and "maxdirs", which can be used
> to exclude the file-name and some of the directories in the path. The
> remaining portions of the path are then used as part of the hash computation
> for selecting among multiple parent caches.
> For our usage, it was desirable from an operational perspective to direct all
> components of particular sub-tree to a single parent cache (to simplify
> trouble-shooting, pre-loading, etc.). This can be achieved by excluding the
> query-string, file-name, and right-most portions of the path from the hash
> computation.
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