[infinispan-dev] poll on self-tuning ISPN / JGROUPS paramters

[Paolo Romano]

Hi,

in the last Cloud-TM's meeting in Rome we have discussed the idea of 
posting a poll asking to ISPN's users which parameters they consider 
more complex to tune, or which parameters they consider as more 
important to be self-tuned.

Before we post the poll, however, we thought to first ask you if you 
think that we could suggest also different parameters.

The current list of parameters includes:

     - size of the marshalling buffer

     - frequency with which replicationQueue (for asynchronous acks) is 
processed:
         - clustering->async-> replQueueMaxElements
         - clustering->async-> replQueueInterval

     -number of max concurrent transactions  (currently this is 
unbounded, but we could self-tune the multi-programming level to 
maximize performance depending on the number of available cores, the 
actual conflict rate among transactions etc.)

     -lock striping, also adapting size of lock pool (striping can lead 
to false sharing, but reduce the memory footprint and the size of the 
exchanged messages)

     -adaptive timeout for deadlock detection, based on the avg duration 
of a transaction/conflict rate etc

Any suggestions?

Cheers,

     Paolo