[zfs-discuss] Re: How to backup a slice ? - newbie

2007-02-13 Thread Andrew Miller
> Now, so my humble guess, I need to know the commands > to be run in the new install to de-associate c0d0s7 > from the old install and re-associate this drive with > the new install. > All this probably happened through the '-f' in 'zpool > create -f newhome c0d0s7'; which seemingly takes > preced

[zfs-discuss] Re: How to backup a slice ? - newbie

2007-02-11 Thread Andrew Miller
> Both work properly. Half of the job done; now I have > the new home mounted, but inactive. So I can rm -Rf * > or similar there; in order to 'cp -a' the content of > the old home to the new home. > Still the other half is unresolved: How do I mount > the old home which is in no fstab (mnttab), on

[zfs-discuss] Re: How to backup a slice ? - newbie

2007-02-11 Thread Andrew Miller
> Get the content of c0d1s1 to c0d0s7 ? > c0d1s1 is pool home and active; c0d0s7 is not > active. > I have not tried this particular use case, but I think this is a case for "zfs send" and "zfs receive". You'd create a new pool containing only c0d0s7 and do something like this, assuming your o

[zfs-discuss] Re: What SATA controllers are people using for ZFS?

2007-01-10 Thread Andrew Miller
I am running a home fileserver with a pair of 4-port cheapo Silicon Image 3114 based cards. I had to down-rev the firmware on the cards to make them dumb SATA controllers vs. RAID cards. I bought them at Fry's, they were about $70/ea, they're "SIIG SATA 4-channel RAID", part number appears to

[zfs-discuss] Re: ZFS compression / ARC interaction

2006-12-07 Thread Andrew Miller
> Be careful here. If you are using files that have no > data in them yet > you will get much better compression than later in > life. Judging by > the fact that you got only 12.5x, I suspect that your > files are at > least partially populated. Expect the compression to > get worse over > time.

[zfs-discuss] Re: ZFS compression / ARC interaction

2006-12-07 Thread Andrew Miller
> Looking at the source code overview, it looks like > the compression happens "underneath" the ARC layer, > so by that I am assuming the uncompressed blocks are > cached, but I wanted to ask to be sure. > > Thanks! > -Andy > > Yup, your assumption is correct. We currently do > compression

[zfs-discuss] ZFS compression / ARC interaction

2006-12-07 Thread Andrew Miller
Quick question about the interaction of ZFS filesystem compression and the filesystem cache. We have an Opensolaris (actually Nexenta alpha-6) box running RRD collection. These files seem to be quite compressible. A test filesystem containing about 3,000 of these files shows a compressratio