dm-writeboost-dkms software package provides log-structured caching for Linux, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install dm-writeboost-dkms
dm-writeboost-dkms is installed in your system.
Make ensure the dm-writeboost-dkms package were installed using the commands given below,
$ sudo dpkg-query -l | grep dm-writeboost-dkms *
You will get with dm-writeboost-dkms package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Kernels |
| Package | dm-writeboost-dkms |
| Version | 2.2.6-1 |
| Description | log-structured caching for Linux |
| Sub Section | Kernels |