> I'm doing pvmove of some rather large volumes from a Dell Equallogic system to > Dell Compellent. Both are connected on iSCSI to vmware and the guest OS seems > to do this well, but it's slow. I get around 50MB/s at most, even though the > Equallogic is connected at 4x1Gbps and the Compellent is on 10Gbps. Without > multipath, this should give me 100MB/s or so, but then, I get half of that. > Interestingly, the "utilisation" reported by munin shows me a 100% in total of > the two devices compared, as in https://karlsbakk.net/tmp/pvmove-dev-util.png > > Any idea why this utilisation is so high, and what I can do to speed this thing > up? I'm at a 14 days mark to move these 40TiB or so, and I'd like to reduce it > if possible. The backend is obviously not a problem here. Anyone with an idea on this? I just don't think it makes sense... Vennlig hilsen / Best regards roy -- Roy Sigurd Karlsbakk (+47) 98013356 http://blogg.karlsbakk.net/ GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt -- Da mihi sis bubulae frustrum assae, solana tuberosa in modo Gallico fricta, ac quassum lactatum coagulatum crassum. Quod me nutrit me destruit. _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
