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關(guān)注：1
2013-05-23 12:21
求翻譯：查詢處理是并行數(shù)據(jù)庫(kù)的核心技術(shù)之一，決定了并行數(shù)據(jù)庫(kù)的性能。并行條件下的查詢處理需考慮數(shù)據(jù)分布、節(jié)點(diǎn)負(fù)載和網(wǎng)絡(luò)開銷等因素，導(dǎo)致其代價(jià)估計(jì)模型、查詢優(yōu)化算法、執(zhí)行計(jì)劃調(diào)度策略和單點(diǎn)數(shù)據(jù)庫(kù)都有很大差異。目前主流的并行數(shù)據(jù)庫(kù)如TeraData、Aster Data和GreenPlum，為了保護(hù)其核心技術(shù)，內(nèi)部的實(shí)現(xiàn)細(xì)節(jié)沒(méi)有公開，著名的開源系統(tǒng)GridSQL及Postgres-XC也沒(méi)有關(guān)于查詢處理的技術(shù)資料。是什么意思？ 待解決
 懸賞分：1
- 離問(wèn)題結(jié)束還有
查詢處理是并行數(shù)據(jù)庫(kù)的核心技術(shù)之一，決定了并行數(shù)據(jù)庫(kù)的性能。并行條件下的查詢處理需考慮數(shù)據(jù)分布、節(jié)點(diǎn)負(fù)載和網(wǎng)絡(luò)開銷等因素，導(dǎo)致其代價(jià)估計(jì)模型、查詢優(yōu)化算法、執(zhí)行計(jì)劃調(diào)度策略和單點(diǎn)數(shù)據(jù)庫(kù)都有很大差異。目前主流的并行數(shù)據(jù)庫(kù)如TeraData、Aster Data和GreenPlum，為了保護(hù)其核心技術(shù)，內(nèi)部的實(shí)現(xiàn)細(xì)節(jié)沒(méi)有公開，著名的開源系統(tǒng)GridSQL及Postgres-XC也沒(méi)有關(guān)于查詢處理的技術(shù)資料。
問(wèn)題補(bǔ)充： |
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2013-05-23 12:21:38
正在翻譯，請(qǐng)等待...
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2013-05-23 12:23:18
Parallel database query processing is one of the core technology, and determine the parallel performance of the database. Parallel query processing conditions needed to consider the distribution of your data, node and network overhead load factors such as cost estimates, and as a result, their model
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2013-05-23 12:24:58
Inquiry processing is one of parallel database core technologies, has decided the parallel database performance.Under parallel condition inquiry processing must consider factors and so on data distribution, node load and network expenses, cause its price to estimate the model, the inquiry optimizati
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2013-05-23 12:26:38
Query processing is one of the core technologies of parallel databases, determines the performance of parallel database. Parallel query processing under the conditions to be considered a data load distribution, node and network overhead and other factors, resulting in the cost estimation models, que
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2013-05-23 12:28:18
正在翻譯，請(qǐng)等待...
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