Messages in this thread | | | Date | Wed, 02 Apr 2008 13:00:27 -0500 | From | Richard Frank <> | Subject | Re: [ofa-general] InfiniBand/iWARP/RDMA merge plans for 2.6.26 (what'sin infiniband.git) |
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OK - and the conversation was about using NetPerf to compare performance of RDS to UDP relative to suitability for Oracle use ... so I think those statements still illustrate my points...
1) NetPerf does not do what Oracle does - and hence is not useful from Oracle's perspective in comparing ULPs. 2) For some metrics - it's not valid to compare a non-reliable IPC to a reliable IPC - it's not an apples to apples comparison. Especially when the app is considered and what the app must do to use UDP vs RDS.
I did not say that NetPerf should not be extended to support RDS - just that using it to do a comparison of ULPs to determine how well Oracle would run - is not what we (Oracle) would want - at least that was my intention..
Scott Weitzenkamp (sweitzen) wrote: > Rich, > > On Nov 1, 2007, you wrote this to rds-devel: > > "Netperf is too simplistic in that all it seems to do is stream data > in a > simple loop. This is not how Oracle uses the IPC and again does not > reflect what it would take to make UDP reliable. > > For this reason we are not interested in having Netperf support RDS > and > or seeing Netperf data." > > I would like to see RDS supported by existing common tools like netperf, > iperf, etc. so we can easily compare how RDS performs to UDP for IPC > models other than Oracle. > > Scott Weitzenkamp > SQA and Release Manager > Data Center Access Engineering > Cisco Systems > > > > > >> -----Original Message----- >> From: Richard Frank [mailto:richard.frank@oracle.com] >> Sent: Wednesday, April 02, 2008 10:38 AM >> To: Scott Weitzenkamp (sweitzen) >> Cc: Roland Dreier (rdreier); rds-devel@oss.oracle.com; >> linux-kernel@vger.kernel.org; general@lists.openfabrics.org >> Subject: Re: [ofa-general] InfiniBand/iWARP/RDMA merge plans >> for 2.6.26 (what'sin infiniband.git) >> >> I believe there is a patch for NetPerf which supports RDS - >> although it >> may need to be updated - and submitted. >> >> The only prior discussion I can think of - was whether or not NetPerf >> exercises RDS as Oracle would. >> >> I'm not proposing that we should enhance NetPerf to do that >> (but that's >> OK with me). >> >> We created a tool rds-stress which does that. >> >> Scott Weitzenkamp (sweitzen) wrote: >> >>>> WRT to merging RDS into the kernel - our current plans are >>>> >> to wait to >> >>>> see RDS adopted by more than Oracle - before approaching >>>> >> the kernel >> >>>> community about inclusion of RDS. >>>> >>>> >>> I've seen statements before from someone from Oracle that >>> >> RDS was only >> >>> for Oracle's use, for example, that person did not want >>> >> netperf changed >> >>> to support RDS. >>> >>> Scott Weitzenkamp >>> SQA and Release Manager >>> Data Center Access Engineering >>> Cisco Systems >>> >>>
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