[jira] [Updated] (TS-918) Allow interval-based rotation for round robin entries

["M. Nunberg (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TS-918?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

M. Nunberg updated TS-918:
--------------------------

    Attachment: timed_round_robin.patch

> Allow interval-based rotation for round robin entries
> -----------------------------------------------------
>
>                 Key: TS-918
>                 URL: https://issues.apache.org/jira/browse/TS-918
>             Project: Traffic Server
>          Issue Type: New Feature
>          Components: DNS
>            Reporter: M. Nunberg
>         Attachments: timed_round_robin.patch
>
>
> This patch allows trafficserver to rotate round-robin DNS entries based on interval rather than frequency.
> This is beneficial for HTTP keepalive when there are a small amount of client requests scaled over multiple clients.
> Thus, for e.g. google which tends to return 4-5 RR/SA entries, the normal behavior would be to open 5 TCP connections to google if five clients requested five objects (or even if a single client requested 5 objects, if strict round robin is enabled).
> This patch would help in such situations by making round robin rotation based on an absolute interval, so requests are forwarded to a single TCP connection for each interval. After the interval expires, the DNS RR entry is rotated.

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