Closed Bug 550655 Opened 16 years ago Closed 16 years ago

Excess DNS 'A' record duplicate responses

Categories

(mozilla.org Graveyard :: Server Operations, task)

Product:
mozilla.org Graveyard
Component:
Server Operations
Type:
task
Priority:
Not set
Severity:
normal

Tracking

(Not tracked)

Status:
RESOLVED WONTFIX

People

(Reporter: reed, Unassigned)

Details

$ host www.mozilla.org www.mozilla.org is an alias for www-mozilla-org.geo.mozilla.com. www-mozilla-org.geo.mozilla.com is an alias for www-mozilla-org.glb.mozilla.net. www-mozilla-org.glb.mozilla.net has address 63.245.217.21 www-mozilla-org.glb.mozilla.net has address 63.245.217.21 www-mozilla-org.glb.mozilla.net has address 63.245.217.21 www-mozilla-org.glb.mozilla.net has address 63.245.217.21 www-mozilla-org.glb.mozilla.net has address 63.245.217.21 $ host www.mozilla.com www.mozilla.com is an alias for www-mozilla-com.glb.mozilla.net. www-mozilla-com.glb.mozilla.net has address 63.245.209.106 www-mozilla-com.glb.mozilla.net has address 63.245.209.106 What's with all the duplicate 'A' record responses?
I agree that looks squirrely but that's how the GLB software works. There are multiple different A RRs. When the masking happens you get the same quantity but only the IP that is "best" for you. Are you seeing actual problems?
(In reply to comment #1) > I agree that looks squirrely but that's how the GLB software works. There are > multiple different A RRs. When the masking happens you get the same quantity > but only the IP that is "best" for you. I have to say that's probably the dumbest method of handling GLB I've ever seen... You might want to contact the vendor about getting that fixed. > Are you seeing actual problems? No, but it could cause minor performance issues due to the increased number of bytes in the DNS query response... I haven't measured it, so not sure how much of a hit it really is, but it is something to consider.
It is what it is. I'll make a note with Zeus. This is a CANTFIX - we'll pick up an update when they rev the software (or get around to combining it into TM).
Status: NEW → RESOLVED
Closed: 16 years ago
Resolution: --- → WONTFIX
> No, but it could cause minor performance issues due to the increased number of > bytes in the DNS query response... I haven't measured it, so not sure how much > of a hit it really is, but it is something to consider. Minor performance vs. page loading from a closer origin - the latter probably wins. And Minor performance vs. automatic failover, latter again. :)
Product: mozilla.org → mozilla.org Graveyard
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