BytesToBytesMap Append-Only Hash Map

2012-04-06 分类：spark-sql 阅读(1461) 评论(0)

BytesToBytesMap Append-Only Hash Map

BytesToBytesMap is…FIXME

Low space overhead,
Good memory locality, esp. for scans.

`lookup` Method



Location lookup(Object keyBase, long keyOffset, int keyLength)
Location lookup(Object keyBase, long keyOffset, int keyLength, int hash)

Location lookup(Object keyBase, long keyOffset, int keyLength)

Location lookup(Object keyBase, long keyOffset, int keyLength, int hash)

Caution

FIXME

`safeLookup` Method



void safeLookup(Object keyBase, long keyOffset, int keyLength, Location loc, int hash)

void safeLookup(Object keyBase, long keyOffset, int keyLength, Location loc, int hash)

safeLookup…FIXME

Note	`safeLookup` is used when `BytesToBytesMap` does lookup and `UnsafeHashedRelation` for looking up a single value or values by key.

赞(0) 打赏

未经允许不得转载：spark技术分享 » BytesToBytesMap Append-Only Hash Map

标签：spark-sql

关注公众号：spark技术分享

联系我们联系我们

QQ咨询
QQ咨询
回顶
回顶部

BytesToBytesMap Append-Only Hash Map

BytesToBytesMap Append-Only Hash Map

`lookup` Method

`safeLookup` Method

相关推荐

欢迎关注：spark技术分享

热门标签

近期文章

分类目录

关注公众号：spark技术分享

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

微信扫一扫打赏

QQ咨询

回顶部

BytesToBytesMap Append-Only Hash Map

lookup Method

safeLookup Method

相关推荐

欢迎关注：spark技术分享

热门标签

近期文章

分类目录

关注公众号：spark技术分享

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

微信扫一扫打赏

QQ咨询

回顶部

`lookup` Method

`safeLookup` Method