Or display the Raw with "Beta" or "Experimental" to warn user that it is not a mature feature?
On Fri, Dec 16, 2016 at 12:30 PM, 康凯森 <[email protected]> wrote: > +1. > But the "RAW" measure is still some useful, we could improve it next year > when we have time. > > > ------------------ 原始邮件 ------------------ > 发件人: "ShaoFeng Shi";<[email protected]>; > 发送时间: 2016年12月15日(星期四) 中午12:05 > 收件人: "dev"<[email protected]>; > > 主题: [Discuss] Disable/hide "RAW" measure in Kylin web GUI > > > > Hello developers and users, > > I have a proposal want to disucss here, which is about the "RAW" measure in > Kylin. > > The RAW measure was developed to solve the requirement for getting raw data > when user drill down from high level to low levels. It's performance would > be much better than fetching from source like Hive, so some users like it. > This blog introduces it: > https://kylin.apache.org/blog/2016/05/29/raw-measure-in-kylin/ > > While it has some limitations: > 1) always use dictionary encoding, which means it couldn't support UHC; > since raw columns usually be transaction IDs, numbers, etc, the building > cost is much higher than ordinary dimensions; > 2) the raw messages for a dimension combination are persisted in one big > cell,; When too many rows dumped in one cell, will get BufferOverflow > error. This couldn't be predicted, so for an modeler or analyst he doesn't > know whether this feature could work when he creates the cube. > 3) seems no people maintains it; > > Based on above, I propose hiding this measure on Web GUI by default, so > avoiding confusing user; If someone hear and want to use this, he still can > enable it by simply set in kylin.properties. > > Any input is welcomed. > > -- > Best regards, > > Shaofeng Shi 史少锋 >
