> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:openib-general- > [EMAIL PROTECTED] On Behalf Of Mohit Katiyar, Noida > Sent: Friday, March 10, 2006 11:36 AM > To: openib-general@openib.org > Subject: [openib-general] iSER & FC-SAN performance > > Hi All, > Are there any performance related data of iSER is available or some test > results that were performed on iSER? > Are there any kinds of operational issues in the performance of iSER in > an general FC-SAN environment? I am also looking for some reference > material of operations of iSER on FC Gateway environment? > Thanks in advance > > Mohit Katiyar
Mohit, Your question should be broken to two, one is the iSER performance and the other is an IB to FC gateway performance, and both are very implementation dependent iSER initiator uses zero copy and can map a large SCSI command to a single send+rdma transaction, this allows for very high-bandwidths and low CPU% as the message size grow, the performance we saw is >900MB/s per initiator this was tested with a 4X SDR link (1000 MB/s capable), with DDR it may achieve more. As for IB-FC gateway performance, it depends on the HW architecture of the gateway rather than if its iSER or SRP, e.g. what's the memory BW capacity of the gateway, pci-x vs. pci-express, CPU capacity, and FC ports When targeting larger messages the mem/bus bandwidth become much more critical than the cpu capacities. As an example an iSER-FCP gateway would typically implement a store & forward design (other designs can be achieved as well), the SCSI command would be intercepted, data would be fetched to memory (using RDMA), and a SCSI transaction would be performed on the FC side (were the FC adapter will fetch the data using DMA), in a good gateway implementation multiple I/Os can flow in parallel (asynchronous), this can sustain the 900MB/s in some architectures, in addition multiple gateways can be aggregated to scale bandwidth of many GB/s of data, while still enjoying the single name space and even emulate a single session leveraging on iSCSI mechanisms. The different options for iSER to FC gateways would include: 1. Voltaire FCR product 2. FalconStore NSS product on a PC platform (with IB & FC adapters) You can address the different vendors to get more details on their products & performance, I can point you to the right contacts offline Yaron > _______________________________________________ > openib-general mailing list > openib-general@openib.org > http://openib.org/mailman/listinfo/openib-general > > To unsubscribe, please visit http://openib.org/mailman/listinfo/openib- > general _______________________________________________ openib-general mailing list openib-general@openib.org http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general