On Tue, Jun 29, 2010 at 8:17 AM, Tristram Scott <tristram.sc...@quantmodels.co.uk> wrote: >> >> would be nice if i could pipe the zfs send stream to >> a split and then >> send of those splitted stream over the >> network to a remote system. it would help sending it >> over to remote >> system quicker. can your tool do that? >> >> something like this >> >> s | -----> | j >> -----> | o zfs recv >> (local) l | -----> | i (remote) >> t | -----> | n >> copy from the fifos to tape(s). >> > >> Asif Iqbal > > I did look at doing this, with the intention of allowing simultaneous streams > to multiple tape drives, but put the idea to one side. > > I thought of providing interleaved streams, but wasn't happy with the idea > that the whole process would block when one of the pipes stalled. > > I also contemplated dividing the stream into several large chunks, but for > them to run simultaneously that seemed to require several reads of the > original dump stream. Besides the expense of this approach, I am not > certain that repeated zfs send streams have exactly the same byte content. > > I think that probably the best approach would be the interleaved streams. > > That said, I am not sure how this would necessarily help with the situation > you describe. Isn't the limiting factor going to be the network bandwidth > between remote machines? Won't you end up with four streams running at > quarter speed?
if, for example, the network pipe is bigger then one unsplitted stream of zfs send | zfs recv then splitting it to multiple streams should optimize the network bandwidth, shouldn't it ? > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > -- Asif Iqbal PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
