terrible performance of zfs recv with dedup datasets #13814
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berlinxray
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Recently, I have sent several large snapshots (> 3TB) with zfs send and mbuffer over gigabit ethernet to my second NAS.
ZFS recv writes deduplicated snapshots very slowly to my raidz2. Zpool iostat shows 80k/s.
Snapshots without deduplication are written with normal speed: 120M/s.
Is this a known issue? Is there a workaround?
Any help is much appreciated!
MT
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