On 16/07/13 09:45, Petros wrote: > Quoting "Tim Connors" <[email protected]> > >> Don't ever use more than 80% of your file system? Yeah, I know that's not >> a very acceptable alternative. > > The 80% is a bit of an "old time myth", I was running ZFS with higher > usage under FreeBSD until I hit the "slowness".
Chipping in with a bit of real-world info for you here. Yes, ZFS on Linux still suffers from massive slowdowns once you run out of most of the free space. It's more than 80%, I'll grant, but not a whole lot - maybe 90%? > BTW: I don't use dedup. Firstly because I use cloning many times and > after that: Well, that are changes unique to the ZFS in question. > > I have problems to come up with a scenario to use it. But I am pretty > sure someone asked for it. Maybe someone running a big big server farm > and distributing copies of many many Gigabytes of data to many VMs on > the same box? Dedup is really painful on zfs. Attempting to use it over a multi-terabyte pool ended in failure; using it just a subset of data worked out OK, but ended up with >50GB of memory in the server to cope. Fine for a big server, but how many of you are running little fileservers at home with that much? You do save on a fair bit of disk space if you're storing a pile of virtual machine images that contain a lot of similarities. -Toby _______________________________________________ luv-main mailing list [email protected] http://lists.luv.asn.au/listinfo/luv-main
