[PATCH 0/2] ceph osd: initial VMware VAAI support

[Mike Christie <mchristi@redhat.com>]

Sorry. Edited the wrong line in the --compose screen. Due to the lack of
subject I guess it is going into some spam filters. Here is the mail:

On 03/10/2016 12:34 AM, Mike Christie wrote:
> The following patches made over the ceph master branch
> implement OSD side support for VMware VAAI's Atomic Test
> and Set (ATS) and Write Same (Zero) requests.
> 
> ATS is used for operations like locking and heartbeats. It
> is implemented by as the SCSI COMPARE_AND_WRITE command which
> requires the device to read N blocks, compare them to data
> sent with the command, and if equal, write N blocks.
> 
> Zero is used to initialize blocks to zero. It is implemented
> as the SCSI WRITE_SAME command which passes the device a
> block's worth of data and has it write it multiple times.
> 
> This does not include support for XCOPY/extended copy. I
> am still looking into this, but it seems it might be
> difficult to support due to rbd being more tuned to cloning
> entire devices. When we implement VASA, the cloneVirtualVolume
> might be something we can support though.
> 
> More info on VAAI can be found here:
> http://www.vmware.com/resources/techresources/10337
> 
> The krbd patches which use these requests are in vaai branch of
> this tree:
> https://github.com/mikechristie/linux-kernel
> 
> I did not submit them in this thread, because they depend on other
> patches that are still being reviewed upstream and I did not want
> to waste people's time reviewing them if they change. These OSD side
> patches should be ok to review and merge, because the op format 
> and implemention should not change.
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>