Hi George, In order to use FTL with emulated OCSSD drive in QEMU you need to get QEMU from this branch: https://github.com/spdk/qemu/tree/spdk-3.0.0 Please refer to section "FTL usage with OCSSD nvme bdev" and "Configuring QEMU " in https://spdk.io/doc/ftl.html In "Configuring SPDK" section you have example how to create FTL bdev. You can also look in spdk/test/ftl/ directory for examples how to use ocssd bdev with fio or bdevperf. Thanks, Wojtek -----Original Message----- From: ruizhang1230(a)buaa.edu.cn <ruizhang1230(a)buaa.edu.cn&gt; Sent: Wednesday, May 27, 2020 15:10 To: spdk(a)lists.01.org Subject: [SPDK] how to use the OCSSD bdev in the qemu by writing my own program？ Dear all, I have followed the steps which described by the web site https://spdk.io/doc/ftl.html. But i still do not know how to use the OCSSD bdev in the qemu by writing my own program. There is no example code that i can learn from. So can you give me a example code? Thanks, George _______________________________________________ SPDK mailing list -- spdk(a)lists.01.org To unsubscribe send an email to spdk-leave(a)lists.01.org