LECCIÓN 13 ITER CRIMINIS
2. LOS ACTOS PREPARATORIOS
Multiple active Satellite rows are similar to Satellite overloading. Satellite overloading is discussed previously, in section 6.8 above. The concept here indicates that there are several rows per key that are “alive, active, and valid” all at the same time. In most cases, they would be arriving in the Satellite from different systems. However, there are times when the data is normalized (as in the example below) that make it a better choice to have multi-active Satellite rows.
For in
nstance, a pa VE part; in th uses from mu user and dep
y (most of th es, you may w pose howeve
many phone bers, other d bers is variab mns in a Sate ne_3…. Etc…
isely for thes re 6-12 below archical Cobo didate for this nknown num ment to the pr ussed in sect tify the data.
art number w he planning s
ultiple system pending on th
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ble. In this c ellite, and the causing wid se reasons th w demonstra ol data set. A s technique.
mber of eleme rimary key kn tion 3.2 of th
which is assig system it’s an ms, and they he definition o
plitting the da t further by a ave a list of p umns will arr see 5, and ev ase, it is extr e last thing t de rows, spar hat multi-activ ates the loadi
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Figure 6-12
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remely difficu hat should b rse populatio ve Satellite r ing of hierarc cal structure ing the struct ent record. T
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2: Multi-Activ
ithin each so ers on incom ays your load e same load ult to “archite
e considered n, and a bun ows exist!
chical XML da d informatio ture, the arch The normalize number. Su provide a mec
ve Satellite R
manufacturi number may (depending o ve Satellite r most cases), ource system ming data; tha ding process batch – the ect” the right d is: phone_1 nch of null co
ata; it could a n with variab hitecture is w ed Satellite h
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ng system it’
y have multip on the view p number of ph t set of phone 1, phone_2, olumn values
also represen ble list length
well-suited to has an additio
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Figure 6-13:
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