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* Local caching of maps and data is in use. AWIPS2 always did some caching of this data but one of the thin client features was the optional removal (or short-circuiting) of the “does the server have a newer version” check/response (i.e., eliminate one potential round trip query per fetch.) Removing round-trips was important for decent performance via satellite links. * There is no need for a proxy server, as httpd-pypies uses compression by default on the EDEX machine. Does the current Unidata version of the EDEX thrift server support compression as well? Is the client compressing the request packets sent to EDEX/Pypies? FYI, the other use case of the proxy configuration was to work in restricted networks that don’t allow unusual ports to be open except dynamically to accommodate normal web browsing (i.e. incident meteorologist who might be setup in a hotel or school or even using airplane wifi! ). * Unidata CAVE runs alertviz on start, the same as non-thin client mode. Whether you could run CAVE with both ‘-alertviz’ and ‘-component thinclient’ options variously worked or broke over many different releases. Sometimes it even varied between Windows and Linux builds in the same release, so last I heard the combination was not officially supported. The question is if the Unidata build supports those few extra features of thin_client mode that eke out that last little bit of network performance (thrift compression, “use cache only” options, don’t connect JMS, etc) and if they are worth supporting. > let me remind folks that Unidata does not support NWS AWIPS II, so if you > download the NWS Windows client and have trouble connecting to a Unidata EDEX > server, you're on your own :) NWS CAVE to Unidata EDEX and vice-versa has never worked for me. Now that Unidata has a MacOS client, there is not yet a common EDEX that can serve all of Linux, MacOS, Windows. -- Erik From: awips2-users-bounces@xxxxxxxxxxxxxxxx [mailto:awips2-users-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Michael James Sent: Friday, December 11, 2015 2:25 PM To: awips2-users@xxxxxxxxxxxxxxxx Subject: Re: [awips2-users] AWIPS2 Thin Client Thanks for the in-depth explanation, Erik. The current release of Unidata CAVE (14.4) makes use of many thin client mode features (to be sure, there is no "thin client" executable separate from CAVE, instead it's a mode of operation). * Local caching of maps and data is in use. * There is no need for a proxy server, as httpd-pypies uses compression by default on the EDEX machine. * Unidata CAVE runs alertviz on start, the same as non-thin client mode. As for Windows, Unidata has not released a Windows client yet, but plans to. The NWS Windows release is available at http://collaborate2.nws.noaa.gov/partners/<https://urldefense.proofpoint.com/v2/url?u=http-3A__collaborate2.nws.noaa.gov_partners_&d=CwMFaQ&c=DsZY2bea7iNIzyp-7sZ0t0F2UfNQZUfZhEPCv_2wBI0&r=QclfWik6GMvrzUddwYI95lvAzqClSLsmZgTYxAvoGGc&m=75liiZ6EearTY_LBHgAaumW-wfQ7MWrfEIuitt9OORU&s=Wp0lo3pA_stvAaa85-_XT6gJvlo2qSrjLNPca1V_mHU&e=> in the various version subdirectories (distributed as .exe and .msi files). For clarity, let me remind folks that Unidata does not support NWS AWIPS II, so if you download the NWS Windows client and have trouble connecting to a Unidata EDEX server, you're on your own :) Michael James Unidata Program Center Boulder, CO On Fri, Dec 11, 2015 at 12:04 PM, Magnuson.Erik <Magnuson.Erik@xxxxxxxxx<mailto:Magnuson.Erik@xxxxxxxxx>> wrote: Thin Client has been implemented in the NWS version of AWIPS2 since version 11.x for both Linux and Windows builds. It's described in Chapter 14 of the AUM and Chapter 26 of the Combined SMM. Like most network programs, AWIPS2 performance depends on both latency and throughput of the link and so Thin Client mode attempts to optimize these albeit at the cost of some loss of functionality. In addition, AWIPS2 was designed to be have all configuration data centrally controlled and dynamically updated but this means a lot of round-trip client-server transactions for every action. The java serialization of these transactions was also optimized for flexibility and not size/speed. * The "Localization Caching" and "Map Caching" options disable checking for new versions of this data and uses what's local. You may even pre-load all localization data to the client which will speed CAVE startup considerably over a slow link. * Product data caching becomes more aggressive at the cost that partially populated products may not be updated when complete. * You can define a proxy server so both EDEX and Pypies use a single external port (e.g. port 80 or port 443.) If you set this up as described, all communications to/from the server will also utilize gzip compression (really helps with some transactions, not so much for satellite images.) * You can turn off the JMS push notification of new data and replace it with timed updates. Last I checked, Thin Client mode required AlertViz and CAVE to be started separately (and with their respective '-component thin..." argument.) -- Erik ________________________________________ From: awips2-users-bounces@xxxxxxxxxxxxxxxx<mailto:awips2-users-bounces@xxxxxxxxxxxxxxxx> [awips2-users-bounces@xxxxxxxxxxxxxxxx<mailto:awips2-users-bounces@xxxxxxxxxxxxxxxx>] On Behalf Of Brendon Hoch [bhoch@xxxxxxxxxxxx<mailto:bhoch@xxxxxxxxxxxx>] Sent: Friday, December 11, 2015 11:38 AM To: Neil Smith; awips2-users@xxxxxxxxxxxxxxxx<mailto:awips2-users@xxxxxxxxxxxxxxxx> Subject: Re: [awips2-users] Teaching in a Computer Lab Environment? [...] I had read that NOAA and Unidata were separately working on developing a AWIPS 2 Thin Client which would run under Windows and use remote servers, but haven't seen any recent news regarding their efforts. The information contained in this email message is intended only for the use of the individual(s) to whom it is addressed and may contain information that is privileged and sensitive. If you are not the intended recipient, or otherwise have received this communication in error, please notify the sender immediately by email at the above referenced address and note that any further dissemination, distribution or copying of this communication is strictly prohibited. The U.S. Export Control Laws regulate the export and re-export of technology originating in the United States. This includes the electronic transmission of information and software to foreign countries and to certain foreign nationals. Recipient agrees to abide by these laws and their regulations -- including the U.S. Department of Commerce Export Administration Regulations and the U.S. Department of State International Traffic in Arms Regulations -- and not to transfer, by electronic transmission or otherwise, any content derived from this email to either a foreign national or a foreign destination in violation of such laws. _______________________________________________ awips2-users mailing list awips2-users@xxxxxxxxxxxxxxxx<mailto:awips2-users@xxxxxxxxxxxxxxxx> For list information, to unsubscribe, or change your membership options, visit: http://www.unidata.ucar.edu/mailing_lists/<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.unidata.ucar.edu_mailing-5Flists_&d=CwMFaQ&c=DsZY2bea7iNIzyp-7sZ0t0F2UfNQZUfZhEPCv_2wBI0&r=QclfWik6GMvrzUddwYI95lvAzqClSLsmZgTYxAvoGGc&m=75liiZ6EearTY_LBHgAaumW-wfQ7MWrfEIuitt9OORU&s=Ydevla4DCxwjBCS-v-mLEHfGv_JYzQVIG0mDuzx2LZ0&e=>
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