On 28.10.2010, at 21:56, Alexey Kopytov wrote: >> That means that the ranges should be different for every thread. I tried to >> simulate that by >> params[i] = sb_rand(thread_id, oltp_table_size) >> >> Maybe there is a better way to handle this? >> > > Yes, I think there should be a better way. > > Given that the number of threads is typically much lower than > oltp_table_size, there will be a significant overlap in produced ranges for > random values, i.e. they won't be that different. > > To prevent overlapping (i.e. make them really different) you need to > partition the whole table into num_threads segments and then make each thread > work with its own segment. That is, something like: > > params[i] = sb_rand(oltp_table_size / num_threads * thread_id, > oltp_table_size / num_threads * (thread_id + 1)). > > Does this make sense? >
Your proposal makes a lot more sense. I will change the code and apply for another merge. Best, Hakan -- Hakan Küçükyılmaz, QA/Benchmark Engineer, Stuttgart/Germany Monty Program Ab, http://askmonty.org/ Skype: hakank_ Phone: +49 171 1919839 -- https://code.launchpad.net/~hakan-askmonty/sysbench/hakan/+merge/39548 Your team sysbench-developers is subscribed to branch lp:sysbench. _______________________________________________ Mailing list: https://launchpad.net/~sysbench-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~sysbench-developers More help : https://help.launchpad.net/ListHelp
