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adding note about paging / queue / filters

This commit is contained in:
Clebert Suconic 2015-02-26 22:20:17 -05:00
parent f896a394e9
commit 90c29864cc
1 changed files with 10 additions and 2 deletions
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docs/user-manual/en/paging.md
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@ -25,8 +25,16 @@ acknowledged up to that point.
Browsers will read through the page-cursor system.
Consumers with selectors will also navigate through the page-files and
it will ignore messages that don't match the criteria.
Consumers with selectors will also navigate through the page-files and it will ignore messages that don't match the criteria.
> *Warning:*
> When you have a queue, and consumers filtering the queue with a very restrictive selector you may get into a situation where you won't be able to read more data from paging until you consume messages from the queue.
>
> Example: in one consumer you make a selector as 'color="red"'
> but you only have one color red 1 millions messages after blue, you won't be able to consume red until you consume blue ones.
>
> This is different to browsing as we will "browse" the entire queue looking for messages and while we "depage" messages while feeding the queue.
## Configuration