Ah cool, didn’t realize there was a neutral definition. We should call that the ‘formal specification’ then.Hm, a UDF that does this rather than a Hive query would probably be better. E.g....of course, now that I've said that, cosmic irony demands we end up implementing in C, or something.SELECTrequest_qualifier(uri_host),count(*)FROMwmf_raw.webrequestWHEREis_pageview(uri_host, uri_path, http_status, content_type)GROUP BYrequest_qualifier(uri_host);Or something like that.-AoOn Dec 15, 2014, at 14:07, Oliver Keyes <okeyes@wikimedia.org> wrote:It's totally tech-agnostic; the neutral definition is on meta. The hive query is just because, since we suspect that's how we'll be generating the data, it makes sense to turn the draft def into HQL for exploratory queries and testing....of course, now that I've said that, cosmic irony demands we end up implementing in C, or something._______________________________________________On 15 December 2014 at 13:46, Toby Negrin <tnegrin@wikimedia.org> wrote:I think the hive code is "representative" in that it's an implementation. It's certainly not the only permitted one.We're moving forward to generate Hive queries that will represent the formal specification.Should a specific implementation (e.g. Hive) represent the formal specification? I tend to think it should be tech-agnostic, no?On Dec 15, 2014, at 12:15, Aaron Halfaker <ahalfaker@wikimedia.org> wrote:Toby, that's right. We're moving forward to generate Hive queries that will represent the formal specification.-Aaron_______________________________________________On Mon, Dec 15, 2014 at 9:12 AM, Oliver Keyes <okeyes@wikimedia.org> wrote:We've written the draft Hive queries and I'm reviewing them with Otto now. Currently blocked on Hadoop heapsize issues, but I'm sure we'll work it through :).--On 15 December 2014 at 12:10, Toby Negrin <tnegrin@wikimedia.org> wrote:Hi Aaron, all --I haven't seen any discussion on this which is a sign that we can forward with turning over the draft. Thoughts?thanks,-TobyOn Tue, Dec 9, 2014 at 5:15 PM, Aaron Halfaker <ahalfaker@wikimedia.org> wrote:_______________________________________________Hey folks,
As discussions on the new page view definition have been calming down, we're preparing to deliver a draft version to the Devs. I want to make sure that we all know the status and that any substantial concerns are raised before we hand things off on Friday, Dec 12th.
For this phase, we are delivering the general filter[1]. This is the highest level filter, and exists primarily to distinguish requests worthy of further evaluation. Our plan is to take the definition as it exists on the 12th, and begin generating high-level aggregate numbers based on it. In future iterations, we will be digging into different breakdowns of this metric, and iterating on it to handle any inconsistencies or unexpected results. There's a few differences from Web Stat Collector's (WSC) version of the general filter that we want to call to your attention to.
- We include searches -- WSC explicitly excludes them.
- We include Apps traffic -- WSC does not detect Apps traffic
- We include variants of /wiki/ (e.g. /zh-tw/, /zh-cn/, /sr-ec/) -- WSC hardcodes "/wiki/"
- We don't include Banner impressions -- WSC includes them.
There are also some known issues with the new definition that are worth your notice:
- Internal traffic is counted
- Note that WSC filters some internal traffic by hardcoding a set of IPs in the definition. We are working on parsing puppet templates in order to automatically detect which IPs represent internal traffic. This will be a /better/ solution, but it's not quite ready yet because parsing puppet is hard.
- Spider traffic is counted
These are problems we're aware of, and will be factoring in as we go forward with our next task: refining the definition using real, hourly-level traffic data. Thanks to everyone who has given feedback and participated in the process thus far, particularly Nemo, Erik, and Christian.
- We will be using the User-agent field to detect and flag spider-based traffic. This "tag definition" will be delivered in a subsequent definition. This actually matches WSC, which does not filter spider for the high-level metrics.
1. https://meta.wikimedia.org/wiki/Research:Page_view/Generalised_filters-Aaron & Oliver
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