[vdo-devel] Dedup performance / Writes

[Gionatan Danti]

Il 2021-01-27 13:08 Jean-Louis Dupond ha scritto:
> The write speeds drop to +- 20-50MB/sec. Which is quite low. As native
> the system can achieve +1000MB/sec (RAID5 on 12 disks).
> I created the volume with the following arguments:
> --blockMapCacheSize=1G --sparseIndex=enabled --vdoSlabSize=32G

Do you use an hardware RAID controller? If so, does it have a 
powerloss-protected writeback cache? During the slowdown, what do "top" 
and "iostat -x -k 1" report?

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Danti Gionatan
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