Hi Sean,   In the RecommendServlet page, we noticed it stated Responds to a GET request to /recommend/[userID](?howMany=n)(&offset=o)(&considerKnownItems=true|false)(&rescorerParams=...)...   We are designing the re-score classes to plugin. For example, pass a list of item-ID to rescorerParams, so that the recommendation only considers the passed item-IDs as recommendation result.   The problem is that the item-IDs list could be very long, and it could easily hit maximum length of HTTP GET request. Are there any suggestions? Is there any Http-Post servlet to do the /recommend/ ?   Thanks. ... View more

Sean,   We are investigating the ways to retrieve and modify the latent feature vectors on the fly... One practical case is to resolve "cold start" problem. For example, given a new item without any user-item associations, we want to "approximate" the item's latent vector. An idea is taking the new item and comparing it's similarity (attribute based similarity, not latent feature similarity) to other items. Then, get the k-NN items' latent vectors to approximate the new items' "latent" vector.   Basically, it's a k-NN based approach. There could be other approaches. Anyway, let say, the new item's latent vector is estimated somehow. Then, we want to "insert" this new entry to existing item latent vectors (Y matrix). I understand there is no end-point API to do that. However, is it feasible to work around, say, using the Java jar level (computation/serving  jar) to getY and then modify Y matrix and "save" it back ? Any suggestions are welcome.   Thanks. Jason ... View more

Hi Sean,   I tried to import a CSV file (150K data with 3000 entries) from the Oryx UI of /ingest (browse to a file and upload). I can see the data saved into /tmp/Oryx (as .csv.gz file). However; in the server console, the uploading of data seems never happened... The console message is as below...   --------------------------------- Fri Oct 03 16:47:53 PDT 2014 INFO Initializing ProtocolHandler ["http-nio-8091"] Fri Oct 03 16:47:53 PDT 2014 INFO Using a shared selector for servlet write/read Fri Oct 03 16:47:53 PDT 2014 INFO Starting service Tomcat Fri Oct 03 16:47:53 PDT 2014 INFO Starting Servlet Engine: Apache Tomcat/7.0.55 Fri Oct 03 16:47:53 PDT 2014 INFO Serving Layer console available at http://192.168.2.6:8091 Fri Oct 03 16:47:53 PDT 2014 WARNING Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Fri Oct 03 16:47:53 PDT 2014 INFO Namespace prefix: file: Fri Oct 03 16:47:53 PDT 2014 INFO No available generation, nothing to do Fri Oct 03 16:47:53 PDT 2014 INFO No available generation, nothing to do Fri Oct 03 16:47:53 PDT 2014 INFO Starting ProtocolHandler ["http-nio-8091"] Fri Oct 03 16:54:53 PDT 2014 INFO No available generation, nothing to do Fri Oct 03 17:01:53 PDT 2014 INFO No available generation, nothing to do Fri Oct 03 17:08:53 PDT 2014 INFO No available generation, nothing to do   ----------------------------   When I "Contrl+C" to terminate the process, then I see the data uploading message (as below). Any idea why ?   ^CFri Oct 03 17:10:51 PDT 2014 INFO Caught signal INT (2) Fri Oct 03 17:10:51 PDT 2014 INFO Pausing ProtocolHandler ["http-nio-8091"] Fri Oct 03 17:10:52 PDT 2014 INFO Stopping service Tomcat Fri Oct 03 17:10:52 PDT 2014 INFO Uploading /tmp/Oryx/oryx-append-2428716983456732298.csv.gz to /Users/............/00000/inbound/oryx-append-2428716983456732298.csv.gz Fri Oct 03 17:10:52 PDT 2014 INFO Uploaded to /....../00000/inbound/oryx-append-2428716983456732298.csv.gz Fri Oct 03 17:10:52 PDT 2014 INFO Stopping ProtocolHandler ["http-nio-8091"] Fri Oct 03 17:10:53 PDT 2014 INFO Destroying ProtocolHandler ["http-nio-8091"]   -------------------------------- ... View more

(1) I tried to invoke "/refresh". The http status code indicates 200. But, I have not noticed the Oryx console messages changed to reflect the re-build of the model matrix. Shouldn't I see some ALS iteration messages in the console ? How do I know the model is refreshing ? Can refreshing take "new" ALS parameters to rebuild the model matrix ?   (2) Is there a way to clean all trainig data and re-set the model ?       ... View more