Peter Humphrey <pe...@prh.myzen.co.uk> schrieb: > On Friday 20 June 2014 19:48:14 Kai Krakow wrote: >> microcai <micro...@fedoraproject.org> schrieb: >> > rsync is doing bunch of 4k ramdon IO when updateing portage tree, >> > that will kill SSDs with much higher Write Amplification Factror. >> > >> > I have a 2year old SSDs that have reported Write Amplification Factor >> > of 26. I think the only reason is that I put portage tree on this SSD >> > to speed it up. >> >> Use a file system that turns random writes into sequential writes, like >> the pretty newcomer f2fs. You could try using it for your rootfs but >> currently I suggest just creating a separate partition for it and either >> mount it as /usr/portage or symlink that dir into this directory (that >> way you could use it for other purposes, too, that generate random short >> writes, like log files). > > Well, there's a surprise! Thanks for mentioning f2fs. I've just converted > my Atom box's seven partitions to it, recompiled the kernel to include it, > changed the fstab entries and rebooted. It just worked.
It's said to be twice as fast with some workloads (especially write workloads). Can you confirm that? I didn't try it that much yet - usually I use it for pendrives only. I have no experience using it for rootfs. And while we are at it, I'd also like to mention bcache. Tho, conversion is not straight forward. However, I'm going to try that soon for my spinning rust btrfs. -- Replies to list only preferred.
