[openstack-dev] [gnocchi] Redis for storage backend
gord at live.ca
Fri Oct 13 13:03:11 UTC 2017
On 2017-10-13 03:37 AM, Julien Danjou wrote:
> On Fri, Oct 13 2017, Yaguang Tang wrote:
>> I see the latest Gnocchi support using Redis as a storage backend, I am
>> testing performance of Redis and Ceph, it seems using Redis as storage
>> backend we can achieve more realtime metric
>> data, gnocchi status shows there is always few metric to process.
>> Is Redis a recommend storage backend ?
> Redis is recommended as an incoming measures backend, not really as a
> storage – though it really depends on the size of your installation.
> Up until 4.0 version, Gnocchi process metrics every
> $metricd.metric_processing_delay seconds. With version 4.1 (to be
> released), the Redis incoming driver has a more realtime processing
> delay which avoids having to poll for incoming data.
what Julien said :)
redis as a storage driver really depends on how you setup persistence
and how much you trust it.
would love to see your redis vs ceph numbers compared to mine :)
(tested part of 4.1 optimisations)
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