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Re: zfs update
From: Scott Duensing <firstname.lastname@example.org>
To: silug-discuss <email@example.com>
Subject: Re: zfs update
Date: Sat, 19 Apr 2014 22:22:08 -0500
It took you a week to move 2.3T of data? That sounds very wrong. I have a similar setup here (10 x 4TB in RAIDZ2) and migrated my 9TB+ of data in just a couple days across GigE.
I attribute at least part of the slowness of the first pass to the 4096:512 emulation which the ashift=12 parameter should have fixed on the return pass. There's something -- possibly inadequate caching memory space -- that ran up the load factor on the return pass to over 8 at one point. The pod has only 8GB and the smallest/slowest AMD 6000 series CPU. Another possibility is that the 1:5 SATA port expanders are inefficient. The main server with a 2TB ZFS array has a proper server motherboard with dual quad-core 2000 series AMD CPUs and 32GB of ECC registered RAM.
- zfs update
- From: "Robert G. (Doc) Savage" <firstname.lastname@example.org>
- Re: zfs update
- From: Scott Duensing <email@example.com>