Hi, I just joined the linux-cluster list after seeing a few of the messages that were cross-posted to linux-kernel. On Thu, Aug 12, 2004 at 03:59:10PM -0700, Steven Dake wrote: > Lars > > Thanks for posting transis. I had a look at the examples and API. The > API is of course different then openais and focused on client/server > architecture. If you havn't looked at it already, you might want to try out the Spread group communication system. http://www.spread.org/ It is, conceptually although not code-wise, a decendant of the Transis work (and the Totem system from UCSB) and is relatively widely used as a production quality group messaging system (Some apache modules use it along with a number of large web-clusters, a few commercial clustered storage systems, and a lot of custom replication apps). It is not under GPL but is open-source under a bsd-style (but not exactly the same) license. Like transis it has a client-server architecture (and a simpler API). > I tried a performance test by sending a 64k message, and then receiving > it 10 times with two nodes. This operation takes about 5 seconds on my > hardware which is 128k/sec. I was expecting more like 8-10MB/sec. Is > there anything that can be done to improve the performance? I would expect transis to definitely do better then 128k/s given tests we ran a number of years ago, but on upto medium sized lan environments the totem/spread protocols are generally faster with less cpu overhead. I know Spread could get 80Mb/s a number of years ago. We recently re-ran a clean set of benchmarks and wrote them up. You can find them at: http://www.cnds.jhu.edu/pub/papers/cnds-2004-1.pdf I admit some bias as I'm one of the lead developers of Spread, and we (the developers) have been building group messaging systems since the early 90's -- so I may look at things a bit differently -- so I would be very intersted in your thoughts on how you could use GCS and whether Spread would be useful. Cheers, Jonathan -- ------------------------------------------------------- Jonathan R. Stanton jonathan@xxxxxxxxxx Dept. of Computer Science Johns Hopkins University -------------------------------------------------------
