Sorry for my ignorance, but can you please tell me why is a bad idea running it as root?

In this particular case as I wanted to change the umask, I launched the two commands from my user directly.
I firstly run the monetdbd start xxx, once it is started I start the database by monetdb start -a

Is there a better way? And issueing the 2nd command is how the mserver5 starts. 
Is that your question?

This in advance
Rgds

On Sat, Sep 8, 2018, 14:15 Stefan Manegold <Stefan.Manegold@cwi.nl> wrote:

...
despite using various "spelling alternatives",
both Sjoerd and myself refer to "mserver5",
i.e., THE server process of the MonetDB database system
(that might get started by the "monetdbd" daemon rather that "by hand")
...

----- On Sep 8, 2018, at 7:00 PM, Sjoerd Mullender sjoerd@monetdb.org wrote:

> How are you running mserver5?  It looks like it is running as root
> (extremely bad idea, by the way), so how does it get started?  It's the
> mserver4 process that writes the file, so the umask Stefan mentioned
> applied to it.
>
> On 08/09/2018 13.32, Ariel Abadi wrote:
>> Stefan
>> Thanks for your info... but, unfortunately didnt work.
>>
>> Ive run it with my user which has umask 0002 and when the file was
>> created by monet, was create RW only for my user :(
>>
>> Thanks either!
>> Rgds
>> Ariel
>>
>> */Ariel Abadi/*
>> Direct: +54 11 5279.2054
>> Mobile:+54 9 11 6050.0101
>> Email: aabadi@starbi.com <mailto:aabadi@starbi.com>
>> Web: www.starbi.com <http://www.starbi.com/>
>>
>> On Fri, Sep 7, 2018 at 5:45 PM, Stefan Manegold <Stefan.Manegold@cwi.nl
>> <mailto:Stefan.Manegold@cwi.nl>> wrote:
>>
>>     Hi,
>>
>>     IMHO the file permissions are determined by the umask
>>     of the user/shell/process that started merser5.
>>
>>     Best,
>>     Stefan
>>
>>     ----- On Sep 7, 2018, at 9:24 PM, Ariel Abadi
>>     aabadi@starconnecting.com <mailto:aabadi@starconnecting.com> wrote:
>>
>>     > Hi!
>>     > We are running some "exports" using the COPY INTO FILE, the
>>     problem we are
>>     > facing is that the file created by monetdb is Read Write ONLY by
>>     the user
>>     > running the database.
>>     >
>>     > -rw------- 1 root monet 9477 Sep 7 15:08 exp.csv
>>     >
>>     > Is there any way so the created file has also RW permission to the
>>     group and NOT
>>     > only the user.
>>     >
>>     > In this case, we are using an NFS share so we are not able to use
>>     setfacl.
>>     >
>>     > Does anybody has an idea how to solve this ?
>>     >
>>     > Thanks a lot in advance!
>>     > Rgds
>>     > Ariel
>>     >
>>     >
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