Date: Wed, 5 Aug 2020 02:55:52 -0400 From: Greg Marsh <greg.marsh@gmail.com> To: freebsd-questions@freebsd.org Subject: Question re ZFS with mixed drive speeds & types Message-ID: <575C4647-8F20-4187-9B74-2D509D31A249@gmail.com>
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Hello everyone. I hope you are well.=20 I=E2=80=99m budgeting to upgrading my home file server. Sort of for more dat= a capacity, but mostly for more physical space, flexibility and to try some t= hings storage wise. It=E2=80=99s currently got a 6x2tb SATA raidz of WD reds= w/ssd for l2arc & logging.=20 1st goal - mirror that ssd. Now, I=E2=80=99ve got a big box of still working Seagate Cheetah 15k scsi dr= ives & several controllers, both raid and not. The drives are only 146gb, bu= t 15k. However, I=E2=80=99m wondering if I were to make a VDEV pool of like 7= of them, add that to my volume and what, if any positive benefit it might t= o my ZFS storage? I ask because about 10 years ago, I was involved in a project that had a HUG= E storage component. Many of the vendors we brought in to pitch, including S= un, were promoting tiered storage. Sun in particular were quite proud of thi= s tech. Their system ran ZFS and had a hybrid of ssd, sas & SATA, with the s= ystem dynamically moving data around the different speed/capacity drives, ba= sed on their activity, all transparent to the application or user. Most ofte= n used data coming from the ssd & sas drives, with less active files kept on= the SATA drives. I=E2=80=99m wondering if this capability made it into the open source versio= n of ZFS. Because that would be fantastic. Thank you all for any insight or advice. Cheers, Greg Sent from my iPhone=
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