Date: Fri, 3 Oct 2014 05:59:48 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: javocado <javocado@gmail.com> Cc: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: Re: Mirrored SSDs for ZIL/SLOG - safety, flushing, capacitors Message-ID: <alpine.BSF.2.11.1410030547070.32407@wonkity.com> In-Reply-To: <CAP1HOmRYy8cX9k7rs4UEzx41Og4phX5U_2OpiUCKBDSRdMf_bQ@mail.gmail.com> References: <CAP1HOmRYy8cX9k7rs4UEzx41Og4phX5U_2OpiUCKBDSRdMf_bQ@mail.gmail.com>
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On Thu, 2 Oct 2014, javocado wrote: > I'm setting up a SLOG to improve performance on my ZFS-based fileserver. I > plan to use 2 mirrored SSD's to create the log device. Before I continue, > I have some specific questions how to approach which hardware to use. > > Primarily, I'm concerned with what damage/corruption may occur when there's > a power loss. Do you have a good UPS? > 2. should I only use SSDs with capacitors? does anyone recommend any? I'm > seeing good things about the Intel s3500 I think the Crucial M550 SSDs have additional backup capacitors also. However, I'm still skeptical about the value of a small SSD power backup versus a true UPS for the entire system.
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