Hi folks, I am newbie to open-iscsi. My case is I export ceph rbd by open-iscsi.
I found the max_sectors_kb is 64, the value is so small, and 4M sequence write is only about 10MB/s. I can not increase max_sectors_kb, if I do it will return "bash: echo: write error: Invalid argument"(But I can change the value to a small one < 64, max_hw_sectors_kb is 32767) Before I export the ceph rbd device by open-iscsi, the max_sectors_kb of bare rbd device is 4096, and 4M sequence write is only about 600MB/s. If I change max_sectors_kb of bare rbd device from 4096 to 64, 4M sequence write will be decreased form 600MB/s to 20MB/s. So I quite curious about max_sectors_kb, it seems that open-iscsi disk throughout may have a relationship with max_sectors_kb. why max_sectors_kb of iscsi disk is so small, can someone explain this? 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 https://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
