dhis2-devs team mailing list archive

[Bob Jolliffe <bobjolliffe@xxxxxxxxx>]

Hi

On 26 May 2010 13:07, Juma Lungo <jlungo@xxxxxxxxx> wrote:
> anyone with quick answers on these questions
>
> --- On Mon, 5/24/10, Perera,Sriyanjit <PereraS@xxxxxxxxxx> wrote:
>
>> From: Perera,Sriyanjit <PereraS@xxxxxxxxxx>
>> Subject: RE: FW: Proposed WP Sessions to Complete Final Document: Thursday at 11 am
>> To: "Juma Lungo" <jlungo@xxxxxxxxx>, arthur@xxxxxxxx, "Dr. Honest Christopher Kimaro" <honest_c@xxxxxxxxx>
>> Cc: jrubona@xxxxxxxxx, "Sarah Emerson" <sarahemerson@xxxxxxxxx>
>> Date: Monday, May 24, 2010, 9:13 PM
>> Juma,
>> Thank you for this, I guess I am trying to understand what
>> the ideal configuration would be for the national server.
>> When you say various servers I assume you mean everything
>> from regular desktop computers to larger, multi processor,
>> large memory servers?
>>
>> Have any of the other countries been able to provide
>> guidance on what is required for a national installation
>> that needs to exchange data with regional and district
>> installations? When we end up with 133 district
>> installations, 21 regional installations and 6500 facilities
>> trying to submit data via IVR or SMS the national data
>> warehouse server will be busy.
>>
>> In these larger 'national' installations are there
>> advantages/disadvantages with different OS or relational
>> database options?
>>

I think Jason may provide some of these answers as he writes up based
on his experience in Zambia.

I think in terms of a "supported" enterprize configuration we may be
gravitating towards ubuntu server with postgres as that is where the
skills seem to be clustered around.

>> Does the current system support full redundancy? Will you
>> need to change the relational database if this becomes a
>> requirement?

Postgres can be setup with warm standby which should adequately meet
the disaster recovery requirements of the ministry.

>Someone mentioned an installation of a national
>> server using a server at MOHSW. Does this server have
>> appropriate anti-virus and backup functionality?
>>
>> As the number of users accessing the system simultaneously
>> increases I would expect the server requirements to
>> increase. Have you been able to articulate what kind of data
>> connectivity you would like.  I would think the data
>> link to the MOHSW would be a limiting factor for a while
>> until we can really build up the ICT capacity there. Are you
>> able to help articulate this and relate it to the Tanzania
>> national installation requirements.  How much data is
>> transferred to and from the server during a regional or
>> district 'synching'?

I'll leave others to provide some typical stats here.

>>
>> Sorry if these questions are basic or misinformed and sorry
>> to bombard you with so many. Just trying to improve my
>> understanding. We are all in agreement that the vision is to
>> set a path for this to be maintained and operated by the
>> MOHSW within their premises. As we discussed I  want to
>> understand the extent to which the system would require or
>> benefit from a temporary, 1-2 years, offsite hosting
>> arrangement that provides improved system availability,
>> improved physical and environmental security, improved data
>> transmission capacity, reliability of data connectivity,
>> automated monitoring of all applications, servers, network
>> devices and communication services 24*7*365, etc.

Good questions. What is being proposed here - that the national
database (and dhis webapp?) is hosted offsite?  Some vpn setup such as
openvpn will definitely be required here.

Regards
Bob
>>
>> Regards
>> Sri Perera
>>
>>
>>
>>
>>
>> Mr. Sriyanjit Perera
>> HMIS Advisor
>> CTS Global, Inc.
>> Assigned to: The Centers for Disease Control Prevention
>> Phone: +255 (0) 22 212 1440/1442 ext. 8409
>> Mobile: +255 (0) 755 32 55 64
>>
>>
>>
>
>
>
>
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