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Re: Thredds - Grib2 Collection Indexing as Independent Task



Thank you, John.  I will begin the upgrade process.

Would there be any way to use an already indexed collection?  Say I were to upgrade to the latest version, set up the feature collection, request it via the web interface, and let it finish indexing.  Could I then take the same configuration for the feature collection and place it in another instance of Thredds(same version and all necessary equivalences of course), start this new instance, and be able to access the aggregation from the new web interface without the usual processing cost of the first indexing? 

Conceptually, this seems to me like it would work because the ncx files would already be written, circumventing the bottleneck.  I do not, however, know how Thredds handles these collections internally.  My theory could easily be hiding an importantly false assumption.  Would this plan ever be possible?  Practical?

Thank you,

Tim

On Wed, Aug 14, 2013 at 11:24 AM, John Caron <address@hidden> wrote:
yes, you will need to do that, there are many bug fixes in later versions, esp for GRIB. so maybe get that process started.

You will need to delete all the .ncx files (.gbx9 are ok) when you get the new tds installed, and let them regenerate. the ncx files are much faster to recreate, as you will see.

ill look for my notes on the 6-hourly cfsr. also ill check with ncdc who ive been working with on this dataset.


On 8/14/2013 10:11 AM, Timothy Lewis - NOAA Affiliate wrote:
John,

We are currently using Thredds 4.3.14.  It's possible to upgrade to
4.3.18, but it would take some coordinating and some time(1 - 2 weeks?).

This is the 6 hourly subset of CFSR.

Thanks,

Tim




On Tue, Aug 13, 2013 at 5:48 PM, John Caron <address@hidden
<mailto:address@hidden>> wrote:

    Hi all:

    1. i see you are using an older version of tds.  which version? can
    you upgrade to 4.3.18?

    2. "olderThan" attribute is ok. how often do these files add/change?

    3. which subset of cfsr is this? monthly, hourly, 6-hourly ??

    John


    On 8/13/2013 2:27 PM, Timothy Lewis - NOAA Affiliate wrote:

        John,

        I've attached the log files after following the steps you requested.

        I've removed the recheckAfter attribute from this aggregation and
        several others that needed it.  As I understand it, the "olderThan"
        attribute is in place to avoid including files that are still being
        written and should not induce any new scans.  I've left this
        attribute
        in the aggregations.  Is this correct?

        Also, where can I find more information on the encoding defects
        for the
        CFSR dataset?

        Thank you again for your help.  We greatly appreciate it.

        Sincerely,

        Tim Lewis



        On Mon, Aug 12, 2013 at 4:30 PM, John Caron
        <address@hidden <mailto:address@hidden>
        <mailto:address@hidden

        <mailto:address@hidden>__>> wrote:


              > 2. change
              >
              >   <collection

        spec="/thredds02/cf___reanalysis/**/ocnh[0-9]{2}\.__gdas\.[0-9]{10}\.grb2"

             recheckAfter="5 min" olderThan="5 min"/>
              >
              > to
              >
              >   <collection

        spec="/thredds02/cf___reanalysis/**/ocnh[0-9]{2}\.__gdas\.[0-9]{10}\.grb2"

             />

             sorry, that should be

               <collection

        spec="/thredds02/cf___reanalysis/**/ocnh[0-9]{2}\.__gdas\.[0-9]{10}\.grb2"

             />
               <update startup="true"/>




        --
        Tim Lewis, Associate Software Engineer
        General Dynamics Information Technology
        NOAA Coastal Data Development Center
        1021 Balch Boulevard, Suite 1003
        Stennis Space Center, Mississippi 39529 USA

        _228.688.2126 <tel:228.688.2126>_

        _address@hidden <mailto:address@hidden>
        <mailto:address@hidden <mailto:address@hidden>__>_
        _address@hidden <mailto:address@hidden>
        <mailto:address@hidden <mailto:address@hidden>__>_





--
Tim Lewis, Associate Software Engineer
General Dynamics Information Technology
NOAA Coastal Data Development Center
1021 Balch Boulevard, Suite 1003
Stennis Space Center, Mississippi 39529 USA

_228.688.2126 <tel:228.688.2126>_



--
Tim Lewis, Associate Software Engineer
General Dynamics Information Technology
NOAA Coastal Data Development Center
1021 Balch Boulevard, Suite 1003
Stennis Space Center, Mississippi 39529 USA

228.688.2126

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