Just in case someone else runs into this post, I think the following two URLs have me sorted:
http://techkites.blogspot.com/2014/06/performance-tuning-and-optimization-for.html http://www.cloudera.com/content/cloudera-content/cloudera-docs/Search/1.1.0-beta2/Cloudera-Search-User-Guide/csug_tuning_solr.html If anyone has anything to add or correct about these two resources, please let me know! Michael Della Bitta Applications Developer o: +1 646 532 3062 appinions inc. “The Science of Influence Marketing” 18 East 41st Street New York, NY 10017 t: @appinions <https://twitter.com/Appinions> | g+: plus.google.com/appinions <https://plus.google.com/u/0/b/112002776285509593336/112002776285509593336/posts> w: appinions.com <http://www.appinions.com/> On Fri, Aug 22, 2014 at 3:54 PM, Michael Della Bitta < michael.della.bi...@appinions.com> wrote: > I'm looking at the Solr Reference Guide about Solr on HDFS, and it's > bringing up a couple of quick questions for me. I guess I got spoiled by > MMapDirectory and how magically it worked! > > 1. What is the minimum number of configuration parameters that enables > HDFS block caching? It seems like I need to set XX:MaxDirectMemorySize when > launching Solr, and then for every collection I want to be able to use > caching with, I need to be sure that the Block Cache Settings are enabled > based on defaults, save for > solr.hdfs.blockcache.write.enabled should be false. > > 2. If I use solr.hdfs.blockcache.global, is the slab count still per core, > or does it apply to everything, or is it no longer relevant? > > 3. Is there a sneaky way of ensuring a given collection or core loads > first so no other cores accidentally override the global blockcache setting? > > 4. In terms of -XX:MaxDirectMemorySize and > solr.hdfs.blockcache.slab.count, is there some percentage of system ram or > some overall maximum beyond which it no longer achieves benefits, or can I > actually just tune this to be nearly all of the ram minus the JVM's > overhead and the RAM needed by the system? Or can it even be set higher > than the overall RAM just to be sure? > > Thanks, > > Michael Della Bitta > > Applications Developer > > o: +1 646 532 3062 > > appinions inc. > > “The Science of Influence Marketing” > > 18 East 41st Street > > New York, NY 10017 > > t: @appinions <https://twitter.com/Appinions> | g+: > plus.google.com/appinions > <https://plus.google.com/u/0/b/112002776285509593336/112002776285509593336/posts> > w: appinions.com <http://www.appinions.com/> >
