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vdo: update info about memory

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Add more info about kernel target memory allocation associated with
VDO pool usage.
This commit is contained in:
Zdenek Kabelac 2022-07-04 15:00:26 +02:00
parent 8ca2b1bc21
commit f445624c33
1 changed files with 12 additions and 3 deletions
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13
man/lvmvdo.7_main
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@ -358,8 +358,17 @@ take otherwise as device is already expected to be empty.
.
.SS \n+[step]. Memory usage
.
The VDO target requires 370 MiB of RAM plus an additional 268 MiB
per each 1 TiB of physical storage managed by the volume.
The VDO target requires 38 MiB of RAM and several variable amounts:
.IP \(bu 2
1.15 MiB of RAM for each 1 MiB of configured block map cache size.
The block map cache requires a minimum of 150 MiB RAM.
.br
.IP \(bu
1.6 MiB of RAM for each 1 TiB of logical space.
.br
.IP \(bu
268 MiB of RAM for each 1 TiB of physical storage managed by the volume.
.br
.P
UDS requires a minimum of 250 MiB of RAM,
which is also the default amount that deduplication uses.