Reserved memory and disk for mesos

[Arkal Arjun Rao <aa...@ucsc.edu>]

Hi All,

I read this line in the book "Building Applications on  Mesos - David
Greenberg":

" The slave will reserve 1 GB or 50% of detected memory, whichever
is smaller, in order to run itself and other operating system services.
Likewise, it will reserve 5 GB or 50% of detected disk, whichever is
smaller. "

I haven't been able to figure out what "operating system services" refers
to, and whether is is really necessary to block off the entire 5Gb of disk
 for that purpose. Could anyone shed some light on what the disk is used
for, in better detail?

Ideally, I'd like as much of the disk as possible for my framework.

Thanks in advance,
Arjun
--
Arjun Arkal Rao

PhD Student,
Haussler Lab,
UC Santa Cruz,
USA

aarao@ucsc.edu

Re: Reserved memory and disk for mesos

[Arkal Arjun Rao <aa...@ucsc.edu>]

Hi Vinod and Zameer,

Thanks for your replies.

Vinod, I understand it can be overridden with the flag. I guess I want to
know what the consequences of doing so would be.
Zameer, do you feel 5Gb is required or could I go lower?

Arjun

On Tue, Mar 15, 2016 at 11:45 AM, Vinod Kone <vi...@apache.org> wrote:

> Also, note that this is the default behavior which can be overridden by
> the --resources flag.
>
> On Tue, Mar 15, 2016 at 11:24 AM, Zameer Manji <zm...@apache.org> wrote:
>
>> Arkal,
>>
>> There are many services that might need to run on a host adjacent to the
>> slave. For example, you might need a dns resolver, ntp, postfix, sshd, etc.
>> All of these services may need disk space for logging or other uses.
>>
>> On Tue, Mar 15, 2016 at 11:12 AM, Arkal Arjun Rao <aa...@ucsc.edu> wrote:
>>
>>> Hi All,
>>>
>>> I read this line in the book "Building Applications on  Mesos - David
>>> Greenberg":
>>>
>>> " The slave will reserve 1 GB or 50% of detected memory, whichever
>>> is smaller, in order to run itself and other operating system services.
>>> Likewise, it will reserve 5 GB or 50% of detected disk, whichever is
>>> smaller. "
>>>
>>> I haven't been able to figure out what "operating system services"
>>> refers to, and whether is is really necessary to block off the entire 5Gb
>>> of disk  for that purpose. Could anyone shed some light on what the disk is
>>> used for, in better detail?
>>>
>>> Ideally, I'd like as much of the disk as possible for my framework.
>>>
>>> Thanks in advance,
>>> Arjun
>>> --
>>> Arjun Arkal Rao
>>>
>>> PhD Student,
>>> Haussler Lab,
>>> UC Santa Cruz,
>>> USA
>>>
>>> aarao@ucsc.edu
>>>
>>> --
>>> Zameer Manji
>>>
>>> <aa...@ucsc.edu>
>>>
>>
>


-- 
Arjun Arkal Rao

PhD Student,
Haussler Lab,
UC Santa Cruz,
USA

aarao@ucsc.edu

Re: Reserved memory and disk for mesos

[Vinod Kone <vi...@apache.org>]

Also, note that this is the default behavior which can be overridden by the
--resources flag.

On Tue, Mar 15, 2016 at 11:24 AM, Zameer Manji <zm...@apache.org> wrote:

> Arkal,
>
> There are many services that might need to run on a host adjacent to the
> slave. For example, you might need a dns resolver, ntp, postfix, sshd, etc.
> All of these services may need disk space for logging or other uses.
>
> On Tue, Mar 15, 2016 at 11:12 AM, Arkal Arjun Rao <aa...@ucsc.edu> wrote:
>
>> Hi All,
>>
>> I read this line in the book "Building Applications on  Mesos - David
>> Greenberg":
>>
>> " The slave will reserve 1 GB or 50% of detected memory, whichever
>> is smaller, in order to run itself and other operating system services.
>> Likewise, it will reserve 5 GB or 50% of detected disk, whichever is
>> smaller. "
>>
>> I haven't been able to figure out what "operating system services" refers
>> to, and whether is is really necessary to block off the entire 5Gb of disk
>>  for that purpose. Could anyone shed some light on what the disk is used
>> for, in better detail?
>>
>> Ideally, I'd like as much of the disk as possible for my framework.
>>
>> Thanks in advance,
>> Arjun
>> --
>> Arjun Arkal Rao
>>
>> PhD Student,
>> Haussler Lab,
>> UC Santa Cruz,
>> USA
>>
>> aarao@ucsc.edu
>>
>> --
>> Zameer Manji
>>
>> <aa...@ucsc.edu>
>>
>

Re: Reserved memory and disk for mesos

[Zameer Manji <zm...@apache.org>]

Arkal,

There are many services that might need to run on a host adjacent to the
slave. For example, you might need a dns resolver, ntp, postfix, sshd, etc.
All of these services may need disk space for logging or other uses.

On Tue, Mar 15, 2016 at 11:12 AM, Arkal Arjun Rao <aa...@ucsc.edu> wrote:

> Hi All,
>
> I read this line in the book "Building Applications on  Mesos - David
> Greenberg":
>
> " The slave will reserve 1 GB or 50% of detected memory, whichever
> is smaller, in order to run itself and other operating system services.
> Likewise, it will reserve 5 GB or 50% of detected disk, whichever is
> smaller. "
>
> I haven't been able to figure out what "operating system services" refers
> to, and whether is is really necessary to block off the entire 5Gb of disk
>  for that purpose. Could anyone shed some light on what the disk is used
> for, in better detail?
>
> Ideally, I'd like as much of the disk as possible for my framework.
>
> Thanks in advance,
> Arjun
> --
> Arjun Arkal Rao
>
> PhD Student,
> Haussler Lab,
> UC Santa Cruz,
> USA
>
> aarao@ucsc.edu
>
> --
> Zameer Manji
>
> <aa...@ucsc.edu>
>