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Posted to issues@trafficcontrol.apache.org by "Jeremy Mitchell (JIRA)" <ji...@apache.org> on 2016/12/13 18:13:58 UTC
[jira] [Comment Edited] (TC-68) To support an HA TO,
regex_revalidate.config should not be written to the file system
[ https://issues.apache.org/jira/browse/TC-68?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15745778#comment-15745778 ]
Jeremy Mitchell edited comment on TC-68 at 12/13/16 6:13 PM:
-------------------------------------------------------------
Obviously, it is going to be slower to pull regex_revalidate.config thru the system as opposed to pulling it off the file system.
curling to https://to.domain.com/Trafficserver-Snapshots/cdn-name/regex_revalidate.config <-- file sitting on the file system
time_namelookup: 0.005
time_connect: 0.058
time_appconnect: 0.000
time_pretransfer: 0.000
time_redirect: 0.000
time_starttransfer: 0.000
----------
time_total: 0.063
curling to https://to.domain.com/genfiles/view/server-host-name/regex_revalidate.config <-- this goes thru mojolicious / Perl / DB
time_namelookup: 0.005
time_connect: 0.062
time_appconnect: 0.307
time_pretransfer: 0.307
time_redirect: 0.000
time_starttransfer: 0.781
----------
time_total: 0.781
was (Author: mitchell852@apache.org):
Obviously, it is going to be slower to pull regex_revalidate.config thru the system as opposed to pulling it off the file system.
curling to https://to.domain.com/Trafficserver-Snapshots/cdn-name/regex_revalidate.config
time_namelookup: 0.005
time_connect: 0.058
time_appconnect: 0.000
time_pretransfer: 0.000
time_redirect: 0.000
time_starttransfer: 0.000
----------
time_total: 0.063
curling to https://to.domain.com/genfiles/view/server-host-name/regex_revalidate.config
time_namelookup: 0.005
time_connect: 0.062
time_appconnect: 0.307
time_pretransfer: 0.307
time_redirect: 0.000
time_starttransfer: 0.781
----------
time_total: 0.781
> To support an HA TO, regex_revalidate.config should not be written to the file system
> -------------------------------------------------------------------------------------
>
> Key: TC-68
> URL: https://issues.apache.org/jira/browse/TC-68
> Project: Traffic Control
> Issue Type: Improvement
> Components: Traffic Ops
> Reporter: Jeremy Mitchell
> Fix For: 2.0.0
>
>
> Currently, when an "invalidate content" request is created via one of these 2 routes:
> - POST /api/$version/user/current/jobs (thru the API)
> - POST /job/external/new (thru the UI)
> regex_revalidate.config is written to the file system at the location dictated by the 'snapshot_dir' parameter:
> https://github.com/apache/incubator-trafficcontrol/blob/master/traffic_ops/app/db/seeds.sql#L32
> In order to support a highly-available/redundant TO, we need to remove all dependencies on files written to the file system.
> My suggestion is that we remove all calls to snapshot_regex_revalidate() which will stop regex_revalidate.config from being written to the file system.
> https://github.com/apache/incubator-trafficcontrol/blob/master/traffic_ops/app/lib/MojoPlugins/Job.pm#L35
> After this is done. regex_revalidate.config can be retrieved like all other ATS config files using the following route: /genfiles/view/:host_name/regex_revalidate.config
> If this change is made, ORT would also have to change
> https://github.com/apache/incubator-trafficcontrol/blob/master/traffic_ops/bin/traffic_ops_ort.pl#L2159
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