VDO – Virtual Data Optimizer RHEL 8 De-Duplication capable

╰+攻爆jí腚メ 2023-10-08 08:08 47阅读 0赞

BY [ARK][] · AUGUST 1, 2019

Virtual Data optimizer – manage kernel VDO devices and related configuration information. VDO in RHEL 8 will provide much data savings.

VDO config is written in /etc/vdoconf.yml

1.  1:10 ratio for VDO logical size Virtual machines, containers
2.  1:3 for object storage
3.  Its Virtual disk optimizer
4.  Thin-provisioned storage
5.  Provides ultimate de-duplication and compression for storage space savings
6.  Best for cloud storage / container environments
7.  UDS index runs inside the kernel as the uds kernel module

VDO – Virtual Data Optimizer RHEL 8

\# yum install vd0 kmod-kvdo

\# vdo create --name=vdtest --device=/dev/sdb --vdoLogicalSize=200G

Creating VDO vdtest

Starting VDO vdtest

Starting compression on VDO vdtest

VDO instance 0 volume is ready at /dev/mapper/vdtest

\# mkfs.xfs -K /dev/mapper/vdtest

meta-data=/dev/mapper/vdtest isize=512 agcount=4, agsize=13107200 blks

= sectsz=4096 attr=2, projid32bit=1

= crc=1 finobt=1, sparse=1, rmapbt=0

= reflink=1

data = bsize=4096 blocks=52428800, imaxpct=25

= sunit=0 swidth=0 blks

naming =version 2 bsize=4096 ascii-ci=0, ftype=1

log =internal log bsize=4096 blocks=25600, version=2

= sectsz=4096 sunit=1 blks, lazy-count=1

realtime =none extsz=4096 blocks=0, rtextents=0

\# mkfs.ext4 -E nodiscard /dev/mapper/vdo-name

\# udevadm settle

In Case of EXT4: /dev/mapper/vdotest /media ext4 defaults,\_netdev,x-systemd.device-timeout=0,x-systemd.requires=vdo.service 0 0

Monitoring VDO FS

\# vdostats --human-readable

Device Size Used Available Use% Space saving%

/dev/mapper/vdtest 20.0G 4.0G 16.0G 20% 99%

Discard unused blocks regularly by starting below service

\# systemctl enable --now fstrim.timer

Created symlink /etc/systemd/system/timers.target.wants/fstrim.timer → /usr/lib/systemd/system/fstrim.timer.

To start & stop particular VDO volumes

vdo start --name=vdotest

vdo stop --name=vdotest

To activate/De-activate VDO volumes

vdo activate --name=vdotest

vdo deactivate --name=vdotest

Check status of vdo

vdo status --name=vdotest

Enable / Disable De-duplication

vdo enableDeduplication --name=vdotest

vdo disableDeduplication --name=vdotest

Compression

vdo enableCompression --name=vdotest

vdo disableCompression --name=vdotest

To increase logical size of the VDO volume

\# vdo growLogical --name=vdotest --vdoLogicalSize=new-logical-size

To increase Physical size of the VD0 volume

vdo growPhysical --name=vdotest

Remove VDO volumes

umount -f /dev/mapper/vdotest

udevadm settle

dmsetup remove vdotest

vdo remove --force --name=vdotest

run discard unused blocks manually

fstrim /media

[ARK]: https://arkit.co.in/author/admin/

VDO – Virtual Data Optimizer RHEL 8 De-Duplication capable

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