Am 17.09.2013 09:20, schrieb Grant: > I'm convinced I need 3-disk RAID1 so I can lose 2 drives and keep > running. I'd also like to stripe for performance, resulting in > RAID10. It sounds like most hardware controllers do not support > 6-disk RAID10 so ZFS looks very interesting. > > Can I operate ZFS RAID without a hardware RAID controller? > > >From a RAID perspective only, is ZFS a better choice than conventional > software RAID? > > ZFS seems to have many excellent features and I'd like to ease into > them slowly (like an old man into a nice warm bath). Does ZFS allow > you to set up additional features later (e.g. snapshots, encryption, > deduplication, compression) or is some forethought required when first > making the filesystem? > > It looks like there are comprehensive ZFS Gentoo docs > (http://wiki.gentoo.org/wiki/ZFS) but can anyone tell me from the real > world about how much extra difficulty/complexity is added to > installation and ongoing administration when choosing ZFS over ext4? > > Performance doesn't seem to be one of ZFS's strong points. Is it > considered suitable for a high-performance server? > > http://www.phoronix.com/scan.php?page=news_item&px=MTM1NTA > > Besides performance, are there any drawbacks to ZFS compared to ext4? > do yourself three favours:
use ECC ram. Lots of it. 16GB DDR3 1600 ECC ram cost you less than 170€. And it is worth it. ZFS showed me just how many silent corruptions can happen on a 'stable' system. Errors never seen neither detected thanks to using 'standard' ram. turn off readahead. ZFS' own readahead and the kernel's clash - badly. Turn off kernel's readahead for a visible performance boon. use noop as io-scheduler.
