Eric Sandeen wrote: > Chris Snook wrote: >> Eric Sandeen wrote: >>> Peter Robinson wrote: >>> >>>> Do you have recommended FS creation parameters for SSDs? >>> Not really; there has unfortunately been very little (or no) >>> optimization of ext4 for SSDs at this point ... >>> >>> It'd probably be an allocator heuristic change but nobody's looked into >>> that yet. >>> >>> Once we get ext4 raid-geometry-aware, we can probably use some of that >>> geometry info to better match up with the erase block sizes on an SSD at >>> least... >> In my testing (without a filesystem), raid-optimized access works quite well on >> SSDs, so that should carry over quite effortlessly. The places where we need >> work are: >> >> a) Make jbd do fewer small writes. >> >> b) Write a partitioning tool that doesn't suck the way fdisk and parted do, so >> we can partition properly for the geometry of modern storage. > > parted and fdisk can do 512-byte sector granularity; what do you need here? > >> c) Put an alignment option in the installer, so people can optimize their >> partitions and filesystems for SSDs, RAID, and anything else where alignment >> matters. > > mkfs should be doing this, not the installer. mkfs.xfs does; > mkfs.ext$FOO should too. > > -Eric > >> -- Chris >> > -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
