> What I intend is to have the best performance and reliability storage as > cheaper as possible... > So, I already tested the open-iscsi target and iniciator on a fedora > box. The results were not > so good, the best result were with a fedora target and windows XP > iniciator.
Are your test results available? I would be curious to see what made the Microsoft Software Initiator (v2.0?) faster than the Open-ISCSI one. Both of them are software based so there shouldn't be a big difference in the speed of them. > > In my inicial goal, I would like to have a linux box as a target and > Gbit NIC cards for acessing > it. Putting four 500GB SATA II HD in a RAID10 assemble for reliability, > creating a 1TB redundant storage... > The redundancy was nice with mdtools, but the performance with the > open-iscsi was not good... > > Speaking about the CPU load, as the storage will be a dedicated file > server, the whole CPU will > be for file sharing and storage... Right. That is unavoidable on the target side. I was thinking on the client (initiator) where the data-gram check-summing would be offloaded to the HBA. There is nothing you can do about the target side to off-load the check-summing (well, not yet). > > So that´s why I am asking about the QLogic HBA´s... If you go with the HBA, you will get the no CPU usage on your initiator (good) and there won't be any extra overhead in unmarshalling TCP->iSCSI->SCSI. I don't know how "much" faster it would be in doing I/O. If you go this route I would advise on buying it with a return-back policy so that you can test it against the software based initiators and if the I/O benchmarks don't make it look that sexy - you can return the HBA. Also be aware that the switches (or the lack of them) between your target and initiator are important. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to email@example.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---