Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-22 Thread Rob Clark
> I'm currently planning on running FreeBSD with ZFS, but I wanted to > double-check how much memory I'd need for it to be stable. The ZFS > wiki currently says you can go as low as 1 GB, but recommends 2 GB; > however, elsewhere I've seen someone claim that you need at least 4 GB. > ... > How a

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-18 Thread Peter Jeremy
On 2010-Jul-19 07:15:45 +0800, Richard Elling wrote: >On Jul 18, 2010, at 3:40 PM, Peter Jeremy wrote: >> 3.5GB. Note that in any case, patching ARC to work around the out- >> of-free-memory bug is fairly important. > >Do you have a CR for this bug? This is a FreeBSD-specific bug related to inte

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-18 Thread Richard Elling
On Jul 18, 2010, at 3:40 PM, Peter Jeremy wrote: > On 2010-Jul-17 01:24:57 +0800, Michael Johnson > wrote: >> I'm currently planning on running FreeBSD with ZFS, but I wanted to >> double-check >> how much memory I'd need for it to be stable. The ZFS wiki currently says >> you >> can go as

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-18 Thread Peter Jeremy
On 2010-Jul-17 01:24:57 +0800, Michael Johnson wrote: >I'm currently planning on running FreeBSD with ZFS, but I wanted to >double-check >how much memory I'd need for it to be stable. The ZFS wiki currently says you >can go as low as 1 GB, but recommends 2 GB; however, elsewhere I've seen >so

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Joerg Schilling
"Sam Fourman Jr." wrote: > using FreeBSD 9 w/ ZFSv15 using default settings, nothing in loader.conf > or nothing in sysctl.conf and a GENERIC kernel > > 12GB of memory seems to be all ZFS wanted to use, I have tried > machines with 32GB > but zfs never wants to use more unless you play with loade

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Sam Fourman Jr.
On Fri, Jul 16, 2010 at 12:24 PM, Michael Johnson wrote: > I'm currently planning on running FreeBSD with ZFS, but I wanted to > double-check > how much memory I'd need for it to be stable.  The ZFS wiki currently says you > can go as low as 1 GB, but recommends 2 GB; however, elsewhere I've seen

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Bob Friesenhahn
On Fri, 16 Jul 2010, Michael Johnson wrote: Just curious, why do you say I'd be able to get away with less RAM in FreeBSD (as compared to NexentaStor, I'm assuming)? I don't know tons about the OSs in question; is FreeBSD just leaner in general? The FreeBSD OS itself is normally leaner but Fr

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Garrett D'Amore
On Fri, 2010-07-16 at 11:57 -0700, Michael Johnson wrote: > us, why do you say I'd be able to get away with less RAM in FreeBSD > (as compared to NexentaStor, I'm assuming)? I don't know tons about > the OSs in > question; is FreeBSD just leaner in general? Compared to Solaris, in my estimatio

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Freddie Cash
On Fri, Jul 16, 2010 at 10:24 AM, Michael Johnson wrote: > I'm currently planning on running FreeBSD with ZFS, but I wanted to > double-check > how much memory I'd need for it to be stable.  The ZFS wiki currently says you > can go as low as 1 GB, but recommends 2 GB; however, elsewhere I've seen

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Michael Johnson
Garrett D'Amore wrote: >On Fri, 2010-07-16 at 10:24 -0700, Michael Johnson wrote: >> I'm currently planning on running FreeBSD with ZFS, but I wanted to >>double-check >> how much memory I'd need for it to be stable. The ZFS wiki currently says >you >> can go as low as 1 GB, but recommends 2 G

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Andrew Gabriel
Garrett D'Amore wrote: Btw, instead of RAIDZ2, I'd recommend simply using stripe of mirrors. You'll have better performance, and good resilience against errors. And you can grow later as you need to by just adding additional drive pairs. -- Garrett Or in my case, I find my home dat

Re: [zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Garrett D'Amore
1GB isn't enough for a real system. 2GB is a bare minimum. If you're going to use dedup, plan on a *lot* more. I think 4 or 8 GB are good for a typical desktop or home NAS setup. With FreeBSD you may be able to get away with less. (Probably, in fact.) Btw, instead of RAIDZ2, I'd recommend sim

[zfs-discuss] Recommended RAM for ZFS on various platforms

2010-07-16 Thread Michael Johnson
I'm currently planning on running FreeBSD with ZFS, but I wanted to double-check how much memory I'd need for it to be stable. The ZFS wiki currently says you can go as low as 1 GB, but recommends 2 GB; however, elsewhere I've seen someone claim that you need at least 4 GB. Does anyone here