|
From: | Jeff Darcy |
Subject: | Re: [Gluster-devel] RFC - "Connection Groups" concept |
Date: | Wed, 26 Jun 2013 11:46:36 -0400 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130510 Thunderbird/17.0.6 |
On 06/27/2013 09:37 AM, Stephan von Krawczynski wrote:
On Wed, 26 Jun 2013 11:04:07 -0400 Jeff Darcy <address@hidden> wrote:[Jeff on UUIDs]I generally vote against using UUIDs and for IPs. In runtime I can easily switch an IP in a replacement situation, but can I switch a UUID in the same easy manner?
I don't see why that would be problematic. The UUIDs we're talking about aren't tied to hardware. They're essentially big random numbers we assign ourselves. IIRC they're just stored in a file, so they can be trivially copied from a system to its replacement. The problem is precisely that DNS names and IP addresses aren't good *system* identifiers. For one thing, they refer to interfaces rather than systems (which might have many interfaces). For another, even that association is too transient. Such IDs are convenient for referring to a system *at a specific point in time* but not permanently, and a permanent ID for the whole system is something we really need. It sure would be nice if the networking community would stop ****ing around when it comes to multi-homed or mobile hosts, but they don't seem inclined to so the rest of us have to fall back on other established patterns for identifying hosts separately from their addresses.
[Prev in Thread] | Current Thread | [Next in Thread] |