Ok, so, after reading a bit more of this discussion and after playing
around at the weekend, i have a couple of questions to ask...
1: Do my pools need to be the same? for example, the pool in the datacenter
is 2 1Tb drives in Mirror. in house i have 5 200Gb virtual drives in
RAIDZ1, giving 800Gb usable. If i am backing up stuff to the home server,
can i still do a ZFS Send, even though underlying system is different?
2: If i give out a partition as an iSCSI LUN, can this be ZFS Sended as
normal, or is there any difference?
On Mon, Oct 8, 2012 at 3:51 AM, Richard Elling <richard.ell...@gmail.com>wrote:
> On Oct 7, 2012, at 3:50 PM, Johannes Totz <johan...@jo-t.de> wrote:
> > On 05/10/2012 15:01, Edward Ned Harvey
> > (opensolarisisdeadlongliveopensolaris) wrote:
> >>> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> >>> boun...@opensolaris.org] On Behalf Of Tiernan OToole
> >>> I am in the process of planning a system which will have 2 ZFS
> >>> servers, one on site, one off site. The on site server will be
> >>> used by workstations and servers in house, and most of that will
> >>> stay in house. There will, however, be data i want backed up
> >>> somewhere else, which is where the offsite server comes in... This
> >>> server will be sitting in a Data Center and will have some storage
> >>> available to it (the whole server currently has 2 3Tb drives,
> >>> though they are not dedicated to the ZFS box, they are on VMware
> >>> ESXi). There is then some storage (currently 100Gb, but more can
> >>> be requested) of SFTP enabled backup which i plan to use for some
> >>> snapshots, but more on that later.
> >>> Anyway, i want to confirm my plan and make sure i am not missing
> >>> anything here...
> >>> * build server in house with storage, pools, etc... * have a
> >>> server in data center with enough storage for its reason, plus the
> >>> extra for offsite backup * have one pool set as my "offsite"
> >>> pool... anything in here should be backed up off site also... *
> >>> possibly have another set as "very offsite" which will also be
> >>> pushed to the SFTP server, but not sure... * give these pools out
> >>> via SMB/NFS/iSCSI * every 6 or so hours take a snapshot of the 2
> >>> offsite pools. * do a ZFS send to the data center box * nightly,
> >>> on the very offsite pool, do a ZFS send to the SFTP server * if
> >>> anything goes wrong (my server dies, DC server dies, etc), Panic,
> >>> download, pray... the usual... :)
> >>> Anyway, I want to make sure i am doing this correctly... Is there
> >>> anything on that list that sounds stupid or am i doing anything
> >>> wrong? am i missing anything?
> >>> Also, as a follow up question, but slightly unrelated, when it
> >>> comes to the ZFS Send, i could use SSH to do the send, directly to
> >>> the machine... Or i could upload the compressed, and possibly
> >>> encrypted dump to the server... Which, for resume-ability and
> >>> speed, would be suggested? And if i where to go with an upload
> >>> option, any suggestions on what i should use?
> >> It is recommended, whenever possible, you should pipe the "zfs send"
> >> directly into a "zfs receive" on the receiving system. For two
> >> solid reasons:
> >> If a single bit is corrupted, the whole stream checksum is wrong and
> >> therefore the whole stream is rejected. So if this occurs, you want
> >> to detect it (in the form of one incremental failed) and then
> >> correct it (in the form of the next incremental succeeding).
> >> Whereas, if you store your streams on storage, it will go undetected,
> >> and everything after that point will be broken.
> >> If you need to do a restore, from a stream stored on storage, then
> >> your only choice is to restore the whole stream. You cannot look
> >> inside and just get one file. But if you had been doing send |
> >> receive, then you obviously can look inside the receiving filesystem
> >> and extract some individual specifics.
> >> If the recipient system doesn't support "zfs receive," [...]
> > On that note, is there a minimal user-mode zfs thing that would allow
> > receiving a stream into an image file? No need for file/directory access
> > etc.
> cat :-)
> > I was thinking maybe the zfs-fuse-on-linux project may have suitable
> I'm sure most Linux distros have cat
> -- richard
> zfs-discuss mailing list
zfs-discuss mailing list