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Wed, 20 Nov 2024 12:23:22 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface List-Id: Filesystems List-Archive: https://lists.freebsd.org/archives/freebsd-fs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-fs@FreeBSD.org MIME-Version: 1.0 Date: Wed, 20 Nov 2024 17:22:21 +0000 From: void To: freebsd-fs Message-Id: <7c108c57-e005-47d4-b9e2-947502d951da@app.fastmail.com> In-Reply-To: References: Subject: Re: improving nfs client & server performance Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Spamd-Result: default: False [-4.05 / 15.00]; NEURAL_HAM_LONG(-1.00)[-0.999]; NEURAL_HAM_SHORT(-1.00)[-0.996]; NEURAL_HAM_MEDIUM(-0.96)[-0.964]; DMARC_POLICY_ALLOW(-0.50)[f-m.fm,none]; R_DKIM_ALLOW(-0.20)[f-m.fm:s=fm1,messagingengine.com:s=fm1]; R_SPF_ALLOW(-0.20)[+ip4:202.12.124.128/27]; RCVD_IN_DNSWL_LOW(-0.10)[202.12.124.149:from]; MIME_GOOD(-0.10)[text/plain]; XM_UA_NO_VERSION(0.01)[]; DWL_DNSWL_NONE(0.00)[messagingengine.com:dkim]; ARC_NA(0.00)[]; FREEMAIL_ENVFROM(0.00)[f-m.fm]; RCPT_COUNT_ONE(0.00)[1]; FREEMAIL_FROM(0.00)[f-m.fm]; MIME_TRACE(0.00)[0:+]; TO_DN_ALL(0.00)[]; MLMMJ_DEST(0.00)[freebsd-fs@freebsd.org]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_TLS_LAST(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; PREVIOUSLY_DELIVERED(0.00)[freebsd-fs@freebsd.org]; DKIM_TRACE(0.00)[f-m.fm:+,messagingengine.com:+] X-Rspamd-Queue-Id: 4Xtp9R6bQFz4R6H X-Spamd-Bar: ---- Hi, On Fri, 15 Nov 2024, at 16:30, J David wrote: > Perhaps I'm overstating the case, but I believe that using ZFS on SMR > disks is strongly discouraged. I haven't tried myself, mainly due to > the horror stories I've read. Stories that sound a lot like yours. I've heard about SMR drives too [0]. But when I was offered one at a Great Price [1] I installed it. I'll admit i didn't hear about SMR+ZFS combination being inadvisable, though. it *was* working ok for the purpose I allocated it - namely, more like a tape drive than a hard drive, in terms of write speed. But read speed *was* acceptable. Ish. It's this which has deteriorated. Everything that was on that drive that was important is now on other non-SMR based hardware or backed up offsite. [0] in the context of archiving not-often-accessed data [1] a gift [2] theoretically, with eg copies=3 it should have been self-healing errors [3] a failure mode of slowing down is preferable to completely giving up. Now, with all the data off it, it'll be junked as too slow for purpose.