On Fri, Mar 24, 2017 at 11:45:15AM +0100, Jack Wang wrote: > From: Jack Wang <jinpu.wang@xxxxxxxxxxxxxxxx> > > This series introduces IBNBD/IBTRS kernel modules. > > IBNBD (InfiniBand network block device) allows for an RDMA transfer of block IO > over InfiniBand network. The driver presents itself as a block device on client > side and transmits the block requests in a zero-copy fashion to the server-side > via InfiniBand. The server part of the driver converts the incoming buffers back > into BIOs and hands them down to the underlying block device. As soon as IO > responses come back from the drive, they are being transmitted back to the > client. > > We design and implement this solution based on our need for Cloud Computing, > the key features are: > - High throughput and low latency due to: > 1) Only two rdma messages per IO > 2) Simplified client side server memory management > 3) Eliminated SCSI sublayer > - Simple configuration and handling > 1) Server side is completely passive: volumes do not need to be > explicitly exported > 2) Only IB port GID and device path needed on client side to map > a block device > 3) A device can be remapped automatically i.e. after storage > reboot > - Pinning of IO-related processing to the CPU of the producer > > For usage please refer to Documentation/IBNBD.txt in later patch. > My colleague Danil Kpnis presents IBNBD in Vault-2017 about our design/feature/ > tradeoff/performance: > > http://events.linuxfoundation.org/sites/events/files/slides/IBNBD-Vault-2017.pdf > Hi Jack, Sorry to ask (I haven't attented the Vault presentation) but why can't you use NVMe over Fabrics in your environment? From what I see in your presentation and cover letter, it provides all you need and is in fact a standard Linux and Windows already have implemented. Thanks, Johannes -- Johannes Thumshirn Storage jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
