On 9/25/19 6:52 PM, Nathan Fish wrote:
You don't need more mons to scale; but going to 5
mons would make the
cluster more robust, if it is cheap for you to do so.
If you assume that 1 mon rebooting for updates or maintenance is
routine, then 2/3 is vulnerable to one failure. 4/5 can survive an
unexpected additional failure while one is down for maintenance.
Considering your scale, this improvement in uptime might be worthwhile.
I second that. Exactly my thoughts as you can survive longer with a
failing MON. I even recommend this for smaller clusters. 5 MONs can
tolerate a MON failure when one is already down for maintenance for example.
It's about getting the most nines behind 99,XXX% of uptime.
Clients 'randomly' connect to one of the Monitors. So more Monitors
allow you to scale to a larger number of clients, but I don't think
there is data on how many clients is too much for a single MON.
Wido
> On Wed, Sep 25, 2019 at 10:26 AM 展荣臻(信泰) <zhanrzh_xt(a)teamsun.com.cn> wrote:
>>
>>
>> hi all:
>> I have a production cluster, and it had 24 hosts (528 osds,3mons) at a
former.
>> Now we want to add 36 hosts so the osd increase to 1320 .
>> does the monitor need to increase?how many numbers of monitor node is
recommended?
>> Another question is which monitor does monclient commnuicate with? And how it
decide?
>> Any suggestions are welcome!
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