Hello there, I've been trying to use iscsi to implement some personal projects, but I'm experiencing some very bad write speed performances.
At the target, I'm exposing a partition of an SSD disk, which locally, using fio, I got around 11MB/s write speed. At the initiator, I connect to the target, to the exposed partition, and when I execute the same fio job, the best I can get for iscsi write speed is an average of 1.2MB/s, which is very low. I'm not expecting to get the same speed as local, but I wasn't expecting to get so very low performance at write. For reads, I've got very good results, reaching the top of the network speed (11/12 MB/s. It's a 100Mbit network). I've tried, as target, using targetcli and scsi-targets-utils (tgt project). For the initiator, I'm using open-iscsi. I've tried teaking some configurations on the initiator, since enabling jumbo frames, increasing the number of commands the iscsi session queue, changing the linux I/O scheduler, changing the device block size, but without sucess. I've got the same results if I enable or disable the iscsi cache at the target. Any help with this problem will be very welcome :) Thanks -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
