RFE : If DVR is enabled increase reserved_host_memory_mb
Bug #1630583 reported by
Joe Talerico
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
tripleo |
Fix Released
|
Medium
|
Brent Eagles |
Bug Description
If DVR is enabled, each compute node will have extra services running that eat up memory. It is important to properly set the `reserved_
Due to : https:/
This is a very large problem, with 50 Routers we can see upwards of 1GB of memory consumption.
My suggestion would be to increase the default 2GB if we ship with DVR to 5GB, however this will only support ~150 routers.
Changed in tripleo: | |
assignee: | nobody → Brent Eagles (beagles) |
Changed in tripleo: | |
assignee: | Brent Eagles (beagles) → Joe Talerico (jtaleric) |
status: | Triaged → In Progress |
Changed in tripleo: | |
assignee: | Joe Talerico (jtaleric) → Brent Eagles (beagles) |
Changed in tripleo: | |
milestone: | ocata-1 → ocata-2 |
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When you're talking about 150 routers you're also saying that the node runs at least 150 VMs and that each VM belongs to a different network. I think that that's a very specific use case. Typically you have large amount of VMs in a network, and 1 router per network, therefor many VMs per router per host, so you'd end up hitting the VM density limit before you hit any bottleneck with routers. That being said, any cloud that has aggressive multi tenancy such as public clouds is hit by this issue severely.