[webservices] too strong ws caching of near real-time time-series data?

[Anthony Lomax]

Hi Bruce,

On 2012/02/28 17:40, Bruce Weertman wrote:
> Anthony.
>
> This is a bug with ws-dataselect. It defaults to using the cached data 
> if it's less than one hour old.
>
> I'm not sure how that got left in there. I see that it's supposed to 
> go look at the data and decide if a
> rebuild of cache is warranted.
OK.  Good to hear that this is a "bug", so that it will eventually go 
away.  But no rush for a fix with regards to my application in 
Early-est, it is only an issue of elegance, for the most part!

Thanks,

Ciao,

Anthony
>
> Cheers,
> -Bruce
>
>
> On Feb 28, 2012, at 12:48 AM, Anthony Lomax wrote:
>
>> Hello all,
>>
>> I am using ws-timeseries to plot trace data in a time window from 5 
>> min before to 20 min after picks made in the Early-est real-time 
>> system (http://early-est.alomax.net)
>>
>> If I run ws-timeseries for a channel right after it is picked, then I 
>> get a plot from 5 min before the pick to some small interval T1 after 
>> the pick.  If I then wait some time and re-run ws-timeseries for the 
>> channel, I would expect to get data from 5 min before the pick until 
>> some interval T2>T1 after the pick.  Instead, the plot always ends at 
>> interval T1 after the pick.  The plotted time window remains the same 
>> even if I add filtering to the ws-timeseries request or if I try the 
>> same ws-timeseries request in a different browser, so this behavior 
>> seems to originate on the server side.
>> (you can reproduce this behavior this at 
>> http://early-est.alomax.net/warning_list.html, ws-timeseries is 
>> invoked by the "BRB" and "HF" links in the "stream" column).
>>
>> Any suggestions on how to disable this apparent caching?
>>
>> Or is this something that is inherent in the web-services back-end?  
>> Perhaps behind the scenes ws-timeseries is caching the data window 
>> found for my first request, and using this data window for all later 
>> requests for the same channel, without recognizing that more of the 
>> requested data has become available.  If so, for real-time work it 
>> would be useful that new data is returned as it becomes available.
>>
>> Thanks,
>>
>> Best regards,
>>
>> Anthony
>>
>>
>> -- 
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>>
>> Anthony Lomax
>>
>> 161 Allée du Micocoulier, 06370 Mouans-Sartoux, France
>>
>> tel: +33 (0)4 93 75 25 02     e-mail: alomax at free.fr   web: 
>> http://www.alomax.net
>>
>>
>>
>> ALomax Scientific    http://www.alomax.net/alss
>>
>> Science & Special Topics   http://www.alomax.net/science
>>
>>
>>
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*Anthony Lomax*

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