Date: Sat, 22 Apr 2023 11:25:34 -0400 From: Robert Fitzpatrick <robert@webtent.org> To: FreeBSD <freebsd-questions@freebsd.org> Subject: ZFS on root with dedupe Message-ID: <edfdb11f-c423-09ce-9d89-2a7859dcfbb5@webtent.org>
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Hi, I installed FreeBSD 13.1 server with ZFS raid 10 to serve a PostgreSQL database, LDAP and DNS. I never noticed until today, I installed some more memory and was checking status after the starting up. DEDUP appears enabled, is that by default? I certainly did not enable. Does this mean it is in fact enabled and what are the repercussions of disabling now? > root@db1:~ # zpool list > NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT > zdb1 262G 26.1G 236G - - 7% 9% 1.00x ONLINE - > root@db1:~ # zpool status > pool: zdb1 > state: ONLINE > scan: scrub repaired 0B in 00:04:52 with 0 errors on Thu Apr 13 10:46:22 2023 > config: > > NAME STATE READ WRITE CKSUM > zdb1 ONLINE 0 0 0 > mirror-0 ONLINE 0 0 0 > ada0p3 ONLINE 0 0 0 > ada1p3 ONLINE 0 0 0 > mirror-1 ONLINE 0 0 0 > ada2p3 ONLINE 0 0 0 > ada3p3 ONLINE 0 0 0 > root@db1:~ # zfs list > NAME USED AVAIL REFER MOUNTPOINT > zdb1 26.0G 228G 96K /zdb1 > zdb1/ROOT 24.8G 228G 96K none > zdb1/ROOT/default 24.8G 228G 14.6G / > zdb1/tmp 1.12M 228G 200K /tmp > zdb1/usr 1.17G 228G 96K /usr > zdb1/usr/home 1.31M 228G 1.30M /usr/home > zdb1/usr/ports 1.17G 228G 1.17G /usr/ports > zdb1/usr/src 96K 228G 96K /usr/src > zdb1/var 5.35M 228G 96K /var > zdb1/var/audit 96K 228G 96K /var/audit > zdb1/var/crash 96K 228G 96K /var/crash > zdb1/var/log 4.78M 228G 660K /var/log > zdb1/var/mail 200K 228G 144K /var/mail > zdb1/var/tmp -- Robert
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