Date: Thu, 22 Nov 2018 17:06:59 +0100 From: Ben RUBSON <ben.rubson@gmail.com> To: freebsd-fs@freebsd.org Subject: [ZFS] Metadata Allocation Classes Message-ID: <82E338C0-09E3-4648-B49B-C028A03B71D7@gmail.com>
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Hi, Intel has pushed the "Metadata Allocation Classes" feature to ZFS on Linux. This allows to store metadata on a so called "special" VDEV, made of SSD for instance. This looks really promising. I wrote a patch 2 years ago which pins metadata in L2ARC, at eviction time. This really helps with some specific workloads. But "Metadata Allocation Classes" should be one step further in terms of performance. Simple question, do you plan to backport this feature to FreeBSD ? Or do you first wait for it to reach Illumos (does not seem to be there yet) ? ZoL discussion : https://github.com/zfsonlinux/zfs/issues/3779 ZoL PR : https://github.com/zfsonlinux/zfs/pull/5182 Thank you very much ! Ben
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