Bug 1572496
| Summary: | Creating a VDO volume with --sparseIndex enabled results in an index on-disk size matching that of a dense index [rhel-7.5.z] | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Oneata Mircea Teodor <toneata> |
| Component: | vdo | Assignee: | vdo-internal <vdo-internal> |
| Status: | CLOSED ERRATA | QA Contact: | Jakub Krysl <jkrysl> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | high | ||
| Version: | 7.5 | CC: | awalsh, bgurney, jkrysl, limershe, rhandlin, sweettea |
| Target Milestone: | rc | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | 6.1.0.168 | Doc Type: | If docs needed, set a value |
| Doc Text: |
When a user created a new Virtual Data Optimizer (VDO) volume with the --indexSparse=enabled option, a dense index was created on the volume instead of sparse. Consequently, space savings on the volume were smaller than expected. With this update, the VDO management software now correctly creates a sparse index with the --indexSparse=enabled option.
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Story Points: | --- |
| Clone Of: | 1570156 | Environment: | |
| Last Closed: | 2018-05-14 16:13:39 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1570156 | ||
| Bug Blocks: | |||
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Description
Oneata Mircea Teodor
2018-04-27 07:19:31 UTC
Tested with vdo-6.1.0.168-18:
# vdo create --name vdo --device /dev/mapper/mpatha --sparseIndex disabled --verbose
Creating VDO vdo
grep MemAvailable /proc/meminfo
pvcreate -qq --test /dev/mapper/mpatha
modprobe kvdo
vdoformat --uds-checkpoint-frequency=0 --uds-memory-size=0.25 /dev/mapper/mpatha
vdodumpconfig /dev/mapper/mpatha
Starting VDO vdo
dmsetup status vdo
grep MemAvailable /proc/meminfo
modprobe kvdo
vdodumpconfig /dev/mapper/mpatha
dmsetup create vdo --uuid VDO-e5ce6f31-095f-471e-9422-1173282e3dc5 --table '0 200940480 vdo /dev/mapper/mpatha 4096 disabled 0 32768 16380 on auto vdo ack=1,bio=4,bioRotationInterval=64,cpu=2,hash=1,logical=1,physical=1'
dmsetup status vdo
Starting compression on VDO vdo
dmsetup message vdo 0 compression on
dmsetup status vdo
VDO instance 5 volume is ready at /dev/mapper/vdo
# cat /sys/uds/index/6/name
dev=/dev/mapper/mpatha offset=4096 size=2781704192
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdc 8:32 0 100G 0 disk
└─mpatha 253:2 0 100G 0 mpath
└─vdo 253:4 0 95.8G 0 vdo
# vdo create --name vdo --device /dev/mapper/mpatha --sparseIndex enabled --verbose
Creating VDO vdo
grep MemAvailable /proc/meminfo
pvcreate -qq --test /dev/mapper/mpatha
modprobe kvdo
vdoformat --uds-checkpoint-frequency=0 --uds-memory-size=0.25 --uds-sparse /dev/mapper/mpatha
vdodumpconfig /dev/mapper/mpatha
Starting VDO vdo
dmsetup status vdo
grep MemAvailable /proc/meminfo
modprobe kvdo
vdodumpconfig /dev/mapper/mpatha
dmsetup create vdo --uuid VDO-2b77f213-8ecd-4ed8-95f8-edc6fea90f41 --table '0 159077384 vdo /dev/mapper/mpatha 4096 disabled 0 32768 16380 on auto vdo ack=1,bio=4,bioRotationInterval=64,cpu=2,hash=1,logical=1,physical=1'
dmsetup status vdo
Starting compression on VDO vdo
dmsetup message vdo 0 compression on
dmsetup status vdo
VDO instance 6 volume is ready at /dev/mapper/vdo
# cat /sys/uds/index/7/name
dev=/dev/mapper/mpatha offset=4096 size=23847940096
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sdc 8:32 0 100G 0 disk
└─mpatha 253:2 0 100G 0 mpath
└─vdo 253:4 0 75.9G 0 vdo
So with dense the index size is ~2.6GB, with sparse it is ~22.7GB.
Regressions testing passed.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:1408 |