Re: [MooseFS-Users] Upgrade from 2.0.81 to 2.0.88 to 3.0.77

[Piotr R. K. <pio...@mo...>]

> I meant when I upgrade the chunk servers to 3.x is there any chance that they will not recognize the data format from the 2.x chunk servers?

There is no such chance neither theoretically nor practically - of course if all your disks are OK.

I mean there might happen a situation, that during start, MooseFS Chunkserver detects a broken disk and then some undergoal chunks may appear, but this is normal and actually does not connected with upgrade from MFS 2.0 to 3.0 at all.

We ran a lot of tests of MooseFS 3 in past months, then we decided to deploy it on our production environments, and then, after over a month of running MooseFS 3 on our production environments and no error reports, we decided to release it to You - Users, to let you use really, really well-tested version.


Best regards, 

--

  <https://moosefs.com/>
Piotr Robert Konopelko
MooseFS Technical Support Engineer
e-mail : pio...@mo... <mailto:pio...@mo...>
www : https://moosefs.com <https://moosefs.com/>
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> On 09 Jun 2016, at 3:39 PM, web user <web...@gm...> wrote:
> 
> Thanks again. You guys are great...
> 
> I meant when I upgrade the chunk servers to 3.x is there any chance that they will not recognize the data format from the 2.x chunk servers?
> 
> 
> 
> On Thu, Jun 9, 2016 at 9:38 AM, Piotr Robert Konopelko <pio...@mo... <mailto:pio...@mo...>> wrote:
> Hi,
> 
> @1. The issue is, that newer (3.0.x) MooseFS Clients are not able to "talk" with old (2.0.x) MooseFS Master Server (Client returns error: "incompatible Master version").
> 
> Actually there is no problem when you follow our guidelines from "Upgrade Guide" - I mean do the upgrade in supported order (1. Master Server, cli, cgi, cgiserv, 2. Metaloggers, 3. Chunkservers, 4. Clients / Mounts - they should be upgraded at the end).
> 
> Of course 2.0.x Clients can connect to 3.0.x Master Server.
> 
> @2. I'm not sure what did you mean - could you be more precise?
> 
> Best regards, 
> 
> --
> 
> <Mail Attachment.png> <https://moosefs.com/>
> 
> Piotr Robert Konopelko
> MooseFS Technical Support Engineer
> e-mail : pio...@mo... <mailto:pio...@mo...>
> www : https://moosefs.com <https://moosefs.com/>
> 
> <Mail Attachment.png>  <https://twitter.com/MooseFS><Mail Attachment.png>  <https://www.facebook.com/moosefs><Mail Attachment.png>  <https://www.linkedin.com/company/moosefs><Mail Attachment.png> <https://github.com/moosefs>
> This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received it by mistake, please let us know by e-mail reply and delete it from your system; you may not copy this message or disclose its contents to anyone. Finally, the recipient should check this email and any attachments for the presence of viruses. Core Technology accepts no liability for any damage caused by any virus transmitted by this email.
> 
> 
>> On 09 Jun 2016, at 3:24 PM, web user <web...@gm... <mailto:web...@gm...>> wrote:
>> 
>> Thanks for the quick server. Couple of quick followup questions:
>> 
>> 1. What was the problem people were referring to with mounts not recognized?
>> 2. Is the chunk server format still the same?
> 
>