[SNMP4J] TableUtils: The difference between sparse and dense

[Smith, Gary]

If you look at the source (including the latest v1.11) you will see that
Dense Table is not implemented, there is no difference between
TableUtils.getTable() & TableUtils.getDenseTable().



Regards

Gary



Date: Wed, 17 Mar 2010 01:26:36 +0100
From: Frank Fock <fock at agentpp.com>
Subject: Re: [SNMP4J] TableUtils: The difference between sparse and
	dense tables
To: snmp4j at agentpp.org
Message-ID: <4BA021BC.60600 at agentpp.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi,

A dense table is something like:

Index | Values
1     | 1 one xxx
3     | 3 three zzzz
3845  | 4 four kdjfgh

Then a sparse table is:

Index | Values
1     | 1 one xxx
3     | 3     zzzz
3845  |   four kdjfgh

where individual cells are missing (there are not NULL,
because NULL must not be returned by an agent on GETNEXT
or GETBULK).

Best regards,
Frank


On 16.03.2010 17:01, Omair-Inam Abdul-Matin wrote:
> Hi,
>
> I was under the impression that the difference between sparse and
dense
> tables is that a sparse table does not have entries for a given MIB
variable
> at consecutive index whereas a dense table does.  However, I ran the
> SNMPRequest test app on an app in dense and sparse table mode and in
both
> modes it was able to fetch nonconsecutive entries correctly:
>
> Arguments: [-c, public, -v, 2c, -Ot, 10.4.115.198,
1.3.6.1.2.1.2.2.1.2]
> Index = 1:
> 1.3.6.1.2.1.2.2.1.2.1 =
>
4d:53:20:54:43:50:20:4c:6f:6f:70:62:61:63:6b:20:69:6e:74:65:72:66:61:63:
65:00
>
> Index = 65539:
> 1.3.6.1.2.1.2.2.1.2.65539 =
>
50:61:72:61:6c:6c:65:6c:73:20:45:74:68:65:72:6e:65:74:20:41:64:61:70:74:
65:72:00
>
> Arguments: [-c, public, -v, 2c, -Otd, 10.4.115.198,
1.3.6.1.2.1.2.2.1.2]
> Index = 1:
> 1.3.6.1.2.1.2.2.1.2.1 =
>
4d:53:20:54:43:50:20:4c:6f:6f:70:62:61:63:6b:20:69:6e:74:65:72:66:61:63:
65:00
>
> Index = 65539:
> 1.3.6.1.2.1.2.2.1.2.65539 =
>
50:61:72:61:6c:6c:65:6c:73:20:45:74:68:65:72:6e:65:74:20:41:64:61:70:74:
65:72:00
>
> Can someone explain to me what the difference, then, is between a
sparse
> table and a dense table?
>
> Thanks,
>
> Omair
> _______________________________________________
> SNMP4J mailing list
> SNMP4J at agentpp.org
> http://lists.agentpp.org/mailman/listinfo/snmp4j

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