Date: Wed, 27 Apr 2016 08:27:00 +1000 From: Andy Farkas <andyf@andyit.com.au> To: freebsd-fs@freebsd.org Subject: Re: How to speed up slow zpool scrub? Message-ID: <571FEB34.7040305@andyit.com.au> In-Reply-To: <571F9897.2070008@quip.cz> References: <698816653.2698619.1461685653634.JavaMail.yahoo.ref@mail.yahoo.com> <698816653.2698619.1461685653634.JavaMail.yahoo@mail.yahoo.com> <571F9897.2070008@quip.cz>
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On 27/04/2016 02:34, Miroslav Lachman wrote: > DH wrote on 04/26/2016 17:47: >>> 5GB of RAM >> >> That seems to be an insufficient amount of system ram when employing >> zfs. >> >> Take a look at this: >> >> http://doc.freenas.org/9.3/freenas_intro.html#ram > > I know 5GB is not much these days but is memory used for scrubbing a > lot? Because I am satisfied with working performance. The only concern > is slow scrubbing and I am not sure that more memory helps in this case. > CPU: Intel(R) Pentium(R) 4 CPU 3.00GHz (3000.02-MHz 686-class CPU) real memory = 4294967296 (4096 MB) avail memory = 3404075008 (3246 MB) ACPI APIC Table: <INTEL D945GTP > ad4: 3815447MB <ST4000DM000 1F2168 CC52> at ata2-master UDMA100 SATA ad5: 3815447MB <ST4000DM000 1F2168 CC52> at ata2-slave UDMA100 SATA ad6: 3815447MB <ST4000DM000 1F2168 CC52> at ata3-master UDMA100 SATA ad7: 3815447MB <ST4000DM000 1F2168 CC52> at ata3-slave UDMA100 SATA NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT z 14.6T 10.1T 4.50T 69% 1.00x ONLINE - scan: scrub repaired 43K in 25h15m with 0 errors <-- NAME STATE READ WRITE CKSUM z ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 ad6 ONLINE 0 0 0 ad4 ONLINE 0 0 0 ad5 ONLINE 0 0 0 ad7 ONLINE 0 0 0 -andyf
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