Re: [ceph-users] private network - VLAN vs separate switch

2014-11-26 Thread Sreenath BH
Thanks for all the help. We will follow the more careful approach! -Sreenath On 11/26/14, Kyle Bader wrote: >> Thanks for all the help. Can the moving over from VLAN to separate >> switches be done on a live cluster? Or does there need to be a down >> time? > > You can do it on a life cluster. T

Re: [ceph-users] private network - VLAN vs separate switch

2014-11-26 Thread Kyle Bader
> Thanks for all the help. Can the moving over from VLAN to separate > switches be done on a live cluster? Or does there need to be a down > time? You can do it on a life cluster. The more cavalier approach would be to quickly switch the link over one server at a time, which might cause a short io

Re: [ceph-users] private network - VLAN vs separate switch

2014-11-26 Thread Sreenath BH
Thanks for all the help. Can the moving over from VLAN to separate switches be done on a live cluster? Or does there need to be a down time? -Sreenath On 11/26/14, Kyle Bader wrote: >> For a large network (say 100 servers and 2500 disks), are there any >> strong advantages to using separate swit

Re: [ceph-users] private network - VLAN vs separate switch

2014-11-25 Thread Kyle Bader
> 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? Physical isolation will ensure that congestion on one does not affect the other. On the flip side, asymmetric network failures tend to be more

Re: [ceph-users] private network - VLAN vs separate switch

2014-11-25 Thread Iban Cabrillo
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 : > It's mostly about bandwidth. With VLANs, the public and cluster networks > are going to be sharing the inter-switch links. > > For a cluste

Re: [ceph-users] private network - VLAN vs separate switch

2014-11-25 Thread Craig Lewis
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.

[ceph-users] private network - VLAN vs separate switch

2014-11-25 Thread Sreenath BH
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 ___