dm-writeboost-rpm

Package	RPM
dm-writeboost-dkms
kmod-dm-writeboost
dm-writeboost-tools
writeboost (user-space utility)

This repository provides the dm-writeboost unofficial rpmbuild scripts for Red Hat Enterprise Linux, CentOS and Fedora.

• dm-writeboost is block-level log-structured caching driver for Linux, influenced by Disk Caching Disk (DCD). It is written by Akira Hayakawa.
  • See Also: https://github.com/akiradeveloper/dm-writeboost
• dm-writeboost-tools is commandset to help users of dm-writeboost to analyze and report bugs.
  • See Also: https://github.com/akiradeveloper/dm-writeboost-tools
• writeboost is a user-space utility to activate dm-writeboost device mappings. It is written by Dmitry Smirnov.
  • See Also: https://gitlab.com/onlyjob/writeboost

Distro support

Working on:

• RHEL/CentOS 7 x86_64
  • dkms version
    • When you try to install or build on el7, must enable the EPEL repository.
  • kmod version
    • RHEL7.6 / CentOS 7.6.1810 or higher.
  • You can choose either version of dkms or kmod. (Cannot use both at the same system!)
• Fedora x86_64
  • dkms version only

Prerequisites:

• dm-writeboost-dkms
  • dkms-1.95 or higher.
• kmod-dm-writeboost
  • kernel-3.10.0-957.el7 or higher.

Compiled Package

• You can find prebuilt rpm binary from here.
  • FedoraCopr khara/dm-writeboost

el7 dkms: (need epel repo)

$ sudo yum install -y epel-release
$ sudo curl -sL -o /etc/yum.repos.d/khara-dm-writeboost.repo https://copr.fedoraproject.org/coprs/khara/dm-writeboost/repo/epel-7/khara-dm-writeboost-epel-7.repo
$ sudo yum install -y dm-writeboost-dkms

el7 kmod:

$ sudo curl -sL -o /etc/yum.repos.d/khara-dm-writeboost.repo https://copr.fedoraproject.org/coprs/khara/dm-writeboost/repo/epel-7/khara-dm-writeboost-epel-7.repo
$ sudo yum install -y kmod-dm-writeboost

fedora:

$ sudo dnf copr enable khara/dm-writeboost
$ sudo dnf install -y dm-writeboost-dkms

Sample Usage

1. Install Packages

Sample: el7, dkms, tools and user-space utility.

$ sudo yum install -y epel-release
$ sudo curl -sL -o /etc/yum.repos.d/khara-dm-writeboost.repo https://copr.fedoraproject.org/coprs/khara/dm-writeboost/repo/epel-7/khara-dm-writeboost-epel-7.repo
$ sudo yum install -y dm-writeboost-dkms dm-writeboost-tools writeboost

2. Edit Configfile

• /etc/writeboosttab

Sample:

## dm-writeboost "tab" (mappings) file, see writeboosttab(5).
##{DM target name}    {cached block device e.g. HDD}    {caching block device e.g. SSD}    [options]
##
## wb_hdd     /dev/disk/by-uuid/2e8260bc-024c-4252-a695-a73898c974c7     /dev/disk/by-partuuid/43372b68-3407-45fa-9b2f-61afe9c26a68    writeback_threshold=70,sync_data_interval=3600
##
wbdev     /dev/sdb     /dev/sdc    writeback_threshold=70

3. Activate writeboost device

$ sudo wbcreate wbdev /dev/sdb /dev/sdc --reformat --writeback_threshold=70

4. Other as needed ...

• enable init service...

$ sudo systemctl enable writeboost.service

• mkfs...

$ sudo mkfs.xfs /dev/mapper/wbdev

• check status...

$ sudo dmsetup status wbdev | sudo wbstatus

• mount setting on fstab...

/dev/mapper/wbdev    /mnt/wb xfs     defaults        0 0

If you are using a large caching device, occasionally mount may time out. In such cases it may be improved with the following workaround.

• Edit: /usr/lib/systemd/system/writeboost.service
  • Please increase TimeoutStartSec

TimeoutStartSec=600

• Edit: /etc/fstab

/dev/mapper/wbdev /data defaults,x-systemd.requires=writeboost.service 0 0

or

/dev/mapper/wbdev /data auto,nofail,x-systemd.device-timeout=1200 0 0

Disclaimer

• This repository and all files that are included in this, there is no relationship at all with the upstream and vendor.