Date: Mon, 7 Feb 2011 14:19:05 -0600 From: Adam Vande More <amvandemore@gmail.com> To: freebsd-emulation@freebsd.org Subject: VirtualBox native iscsi initiator performance is bad Message-ID: <AANLkTinokgSOSQ_%2B3Zzj5mMz3MYf3npzuKACFsUR7oDC@mail.gmail.com>
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Using the native Vbox iscsi initiator for very simple tests I'm getting slightly less than 20 MB/s write speed and VM takes a long time to boot because of DMA LBA errors are being reported on the iscsi/sata disk. If I mount the iscsi on the host, I get close to 50 MB/s and then if I map that to a Virtualbox raw disk, and stick in a VM I get around 42 MB/s write speed. I haven't done any tuning on iscsi target so perhaps that could improve things, but I'm concerned about the huge drop off in performance and reliability issues with the Vbox native version. Does anyone have insight into this? virtualbox-ose-3.2.12 istgt-20110103 These are both recent 8-STABLE versions of Virtualbox. -- Adam Vande More
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