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The concat module can combine multiple underlying bdevs to a single bdev. It is a special raid level. You can add a new bdev to the end of the concat bdev, then the concat bdev size is increased, and it won't change the layout of the exist data. This is the major difference between concat and raid0. If you add a new underling device to raid0, the whole data layout will be changed. So the concat bdev is extentable. Change-Id: Ibbeeaf0606ff79b595320c597a5605ab9e4e13c4 Signed-off-by: Peng Yu <yupeng0921@gmail.com> Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11070 Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com> Community-CI: Mellanox Build Bot Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> |
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