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| author | Akira Yoshiyama <akirayoshiyama@gmail.com> | 2013-02-09 14:26:04 +0000 |
|---|---|---|
| committer | Akira Yoshiyama <akirayoshiyama@gmail.com> | 2013-02-13 14:31:12 +0000 |
| commit | 625e074033bc4d4b42f2ef641a69dd425965ac8f (patch) | |
| tree | 88d8bb7f53499752cd75ae4e6de9aa3c7e7bb602 /nova/exception.py | |
| parent | d980805880c681881504e269e03130e4452630ab (diff) | |
| download | nova-625e074033bc4d4b42f2ef641a69dd425965ac8f.tar.gz nova-625e074033bc4d4b42f2ef641a69dd425965ac8f.tar.xz nova-625e074033bc4d4b42f2ef641a69dd425965ac8f.zip | |
Added a service heartbeat driver using Memcached.
Today the heartbeat information of Nova services/nodes
is maintained in the DB, while each service updates the
corresponding record in the Service table periodically
(by default -- every 10 seconds), specifying the timestamp
of the last update. This mechanism is highly inefficient
and does not scale. E.g., maintaining the heartbeat
information for 1,000 nodes/services would require 100 DB
updates per second (just for the heartbeat).
This patch adds nova.servicegroup.drivers.memcached, a
service heartbeat driver using Memcached. You can reduce
DB updates with it.
blueprint memcached-service-heartbeat
Change-Id: I60bdb1cfbce1fea051f276ebfd6ccc4ad8fe6d2b
Diffstat (limited to 'nova/exception.py')
0 files changed, 0 insertions, 0 deletions