| 期刊名称： |
International Journal of 3-D Information Modeling, |
| 全部作者： |
Xiaoming Li,Weiping Xu,Qing Zhu,Jinxing Hu,Han Hu,Yeting Zhang |
| 出版年份： |
2012 |
| 卷 号： |
1 |
| 期 号： |
3 |
| 页 码： |
37-48 |
| 查看全本： |
|
Thereal-timevisualizationof3DGISatawholecityscalealwaysfacesthechallengeofdynamicdataloadingwithhigh-efficiency.Basedonthemulti-tierdistributed3DGISframework,thispaperpresentsamulti-levelcacheapproachfordynamicdataloading.Itaimstoestablishin3DGISspatialdatabaseengine(3DGIS-SDE)theunifiedmanagementmechanismofcachesonthreelevels,including:theclientmemorycache(CMC)orientedtosharingapplication,theclientfilecache(CFC)organizedbyindex,aswellastheapplicationservermemorycache(ASMC)ofstructuralconsistency.Withthehelpoftheproposedoptimizedcachereplacementpolicy,multi-levelcacheconsistencymaintenanceaswellasmultithreadloadingmodeldesignedinthepaper,theengineisabletoadaptivelymakefulluseofeach-levelcachesaccordingtotheirownapplicationpropertiesandachieveeffectivecoordinationbetweenthem.Finally,apractical3DGISdatabasebasedonOracle11gisemployedfortest.Theexperimentalresultsprovethisapproachcouldsatisfymulti-userconcurrentapplicationsof3Dvisualexploration.
