Hi, From my humble opinion if you have enough money, separate switches are always a better choice.
Regrads, I 2014-11-25 20:47 GMT+01:00 Craig Lewis <cle...@centraldesktop.com>: > It's mostly about bandwidth. With VLANs, the public and cluster networks > are going to be sharing the inter-switch links. > > For a cluster that size, I don't see much advantage to the VLANs. You'll > save a few ports by having the inter-switch links shared, at the expense of > contention on those links. > > If you're trying to save ports, I'd go with a single network. Adding a > cluster network later is relatively straight forward. Just monitor the > bandwidth on the inter-switch links, and plan to expand when you saturate > those links. > > > That said, I am using VLANs, but my cluster is much smaller. I only have > 5 nodes and a single switch. I'm planning to transition to a dedicated > cluster switch when I need the extra ports. I don't anticipate the > transition being difficult. I'll continue to use the same VLAN on the > dedicated switch, just to make the migration less complicated. > > > On Tue, Nov 25, 2014 at 3:11 AM, Sreenath BH <bhsreen...@gmail.com> wrote: > >> Hi >> For a large network (say 100 servers and 2500 disks), are there any >> strong advantages to using separate switch and physical network >> instead of VLAN? >> >> Also, how difficult it would be to switch from a VLAN to using >> separate switches later? >> >> -Sreenath >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > -- ############################################################################ Iban Cabrillo Bartolome Instituto de Fisica de Cantabria (IFCA) Santander, Spain Tel: +34942200969 PGP PUBLIC KEY: http://pgp.mit.edu/pks/lookup?op=get&search=0xD9DF0B3D6C8C08AC ############################################################################ Bertrand Russell: *"El problema con el mundo es que los estúpidos están seguros de todo y los inteligentes están llenos de dudas*"
_______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
