Yes, you can (and should!) restart them one at a time to avoid downtime.

On Thu, Jan 25, 2018 at 9:57 AM 周 威 <[email protected]> wrote:

> Hi Greg,
>
> Can I restart daemons one by one online?  Or there will be a down time
> before I restart all daemons?
>
> Thanks
> Choury
>
> ________________________________________
> 发件人: Gregory Farnum <[email protected]>
> 发送时间: 2018年1月25日 16:52:46
> 收件人: 周 威
> 抄送: [email protected]
> 主题: Re: [ceph-users] How to migrate ms_type to async ?
>
> You just have the set the config option ("ms_type = async", I think?) and
> restart daemons. Both messengers use the same protocol and there's no
> migration in terms of data or setting up compatibility.
> -Greg
>
> On Thu, Jan 25, 2018 at 9:43 AM 周 威 <[email protected]<mailto:[email protected]>>
> wrote:
> Hi all,
>
> I have a cluster in jewel which is upgraded from hammer , I want to
> migrate ms_type to async, but I can't find documents about it. Does
> somebody know how to do that?
>
> Thanks
> Choury
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