[Users] Migration from Exchange to Zimbra very slow

[Frédéric Nass]

Le 12/12/2018 à 02:58, Fabio S. Schmidt a écrit :
> Hi,
>
> Has anyone done any migration recently from Exchange to Zimbra using 
> the Migration Tool?
>
> We are trying to migrate a customer of us from Exchange and the Zimbra 
> migration tool is very slow. I mean, it's taking about 40 minutes to 
> migrate an account with just 300mb and 6000 items.
>
> We couldn't find any bottleneck. CPU, RAM, I/O,  and NETWORK 
> performance/sizing are OK.
>
> Best regards.
> Fabio S. Schmidt
>

Hi Fabio,

Something that crosses my mind by reading your post is related to the 
redologs. I don't know how the Migration Tool works exactly but you 
might want to disable the redologs on stores that import mailbox data.
It might speed things up.

zmprov desc -a zimbraRedoLogEnabled
zimbraRedoLogEnabled
     whether redo logging is enabled

                type : boolean
               value :
            callback :
           immutable : false
         cardinality : single
          requiredIn :
          optionalIn : globalConfig,server
               flags : serverInherited
            defaults : TRUE
                 min :
                 max :
                  id : 74
     requiresRestart : mailbox
               since :
     deprecatedSince :

Regards,
Frédéric.
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