[Mrql Wiki] Trivial Update of "Pagerank" by LeonidasFegaras

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The "Pagerank" page has been changed by LeonidasFegaras:
https://wiki.apache.org/mrql/Pagerank?action=diff&rev1=2&rev2=3

  
  To run the same query using Hama, you need to know the number of simultaneous BSP tasks that can run
  in parallel on your Hama cluster without a problem. For example, if you have 16 nodes with 4 cores each,
- you need to set {{{-bsp_tasks}}} less than 64, eg 50.
+ you need to set {{{-nodes}}} less than 64, eg 50.
  First, you need to generate a random graph and store it in a HDFS file
  (if you haven't done so for the !MapReduce example):
  
@@ -49, +49 @@

  
  === Run PageRank on a Spark Standalone Cluster ===
  
- To run the same query using Spark, change the SPARK_MASTER and SPARK_DEFAULT_URI in {{{conf/mrql-conf.sh}}} to point to your Spark cluster URIs.
+ To run the same query using Spark, change the SPARK_MASTER and FS_DEFAULT_NAME in {{{conf/mrql-conf.sh}}} to point to your Spark cluster URIs.
  Then, you need to generate a random graph and store it in a HDFS file
  (if you haven't done so for the others examples):