Minor point on FailureDetector

2010-07-13 Thread Masood Mortazavi
In FailureDetector, in ArrivalWindow, in double p(double t), is return 1 - ( 1 - Math.pow(Math.E, exponent) ); really needed, instead of return Math.pow(Math.E, exponent) ; I believe the integral of the the Exponential Distribution from t to infinity leads to the latter value.

Re: Reviewing . . . RackAwareStrategy.java . . . ( rev 954657 )

2010-06-15 Thread Masood Mortazavi
On Tue, Jun 15, 2010 at 10:55 AM, Jonathan Ellis jbel...@gmail.com wrote: On Mon, Jun 14, 2010 at 11:03 PM, Masood Mortazavi masoodmortaz...@gmail.com wrote: The comment on the top of RackAwareStrategy says: You are correct. RAS sort of works under other conditions but it is primarily

Generated code?

2010-06-14 Thread Masood Mortazavi
Hi, My assumption is that what one finds in interface/thrift/gen-java is actually generated code. If so, why is it checked in as source under SVN? (Certainly, the avro generated code doesn't seem to be checked in.) Regards, Masood

JIRA update notifications ...

2010-04-21 Thread Masood Mortazavi
I never see any JIRA update notifications on dev@cassandra.apache.org (In fact, there seems to be no automated dev notifications there.) This may be by intent. If so, are the JIRA updates directed elsewhere? Is there another target e-mail alias? Sending JIRA notifications to an e-mail

Re: 0.6 insert performance .... Re: [RELEASE] 0.6.1

2010-04-20 Thread Masood Mortazavi
at 5:46 AM, Masood Mortazavi masoodmortaz...@gmail.com wrote: Minimizing GC pauses or minimizing time slots allocated to GC pauses -- either through configuration or re-implementations of garbage collection bottlenecks (i.e. object-generation bottlenecks) -- seem to be the immediate approach

Re: 0.6 insert performance .... Re: [RELEASE] 0.6.1

2010-04-19 Thread Masood Mortazavi
with 0.6, heap usage graphs look almost identical. The GC is a noticeable bottleneck, we’ve tried jdku19 and jrockit vm’s. It basically kills any kind of soft real time behavior. *From:* Masood Mortazavi [mailto:masoodmortaz...@gmail.com] *Sent:* Monday, April 19, 2010 4:15 AM *To:* u