FWIW another backup tool (Acronis) managed a consistent approx. 50-60MB/s dd bs=64k if=/dev/sdb | mbuffer -s 65536 -m -m 50% -P 80 -o /dev/st0l
only manages around 30MB/s On Tuesday, 4 April 2017 02:48:01 UTC+1, David C. Partridge wrote: > > Hmmm I couldn’t find anything about this in the stinit docs. > > > > Dave > > > > *From:* open-iscsi@googlegroups.com [mailto:open-iscsi@googlegroups.com] *On > Behalf Of *The Lee-Man > *Sent:* 03 April 2017 20:05 > *To:* open-iscsi > *Subject:* Re: LTO-4 iSCSI performance less than expected ... > > > > On Friday, March 31, 2017 at 2:23:30 PM UTC-7, > david.partri...@perdrix.co.uk wrote: > > I don't know? How do I find out? Should I have it set? > > > > Have you set the Write Immediate Filemark option for the st driver? > > > > There are a couple of ways to enable writing immediate filemarks in the st > driver. One is to use the MTWEOFI ioctl(). If you have access to the source > code for your application, this is a good way to go. > > But I added a user-settable option with kernel commit > c743e44fbb1f8668941e83de07662b1ecd33d083. It allows you to tell the st > driver to write immediate file marks by setting a sysfs attribute. > > -- > > -- 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 open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at https://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
