Hi Yunfeng;
Unfortunately, from the actual experience of online users, V2 has not been significantly improved, and even slightly decreased in some cases. I don’t know the reason. However, V2 is stronger than V1 in terms of code structure and function extension, so I think we should promote V2 first and continue to optimize on the basis of V2. -- 此致！Best Regards 陈明雨 Mingyu Chen Email: chenmin...@apache.org 在 2020-08-18 20:18:03，"Zhao Chun" <zh...@apache.org> 写道： >Hi, Yunfeng > > >Yunfeng Wu <wyfsky...@126.com> 于2020年8月18日周二 下午8:11写道： > >> >> >> >> Can we provide some performance performance comparision between v1 and v2. > >I was worried about the perfomance would slow down when do some string >> field aggs opertion because of the `look up` of the `dict ordinary` >> >> Actually, in theory, segment v2 is more efficient for reading strings than >v1. Because it stores encoded numbers, lighter IO operations are required >when reading. As for the Look-up operation you mentioned, it is an >operation of O1 in the memory, and the time cost is negligible. > >I will appreciate if you can provide some performance comparison test >reports. > >Thanks, >Zhao Chun > > >> >> >> >> >> >> >> >> -- >> >> ------------------------------------------ >> 武云峰 >> email:wyfsky...@126.com >> >> >> >> >> >> 在 2020-08-18 17:22:22，"Zhao Chun" <zh...@apache.org> 写道： >> >+1 >> > >> > >> >Thanks, >> >Zhao Chun >> > >> > >> >41108453 <41108...@qq.com> 于2020年8月18日周二 下午12:24写道： >> > >> >> Yes, it should be like this, saving you having to configure each time >> >> >> >> >> >> >> >> >> >> ------------------ 原始邮件 ------------------ >> >> 发件人: >> >> "dev" >> >> < >> >> morning...@163.com>; >> >> 发送时间: 2020年8月18日(星期二) 中午12:14 >> >> 收件人: "doris-dev"<dev@doris.apache.org>; >> >> >> >> 主题: [DISCUSS] Set SegmentV2 as the default format of Doris Storage >> >> >> >> >> >> >> >> Hi All: >> >> >> >> >> >> I suggest that in version 0.13, SegmentV2 is set as the default storage >> >> format. >> >> All newly created tables are in V2 format. >> >> >> >> >> >> The table created by the user before still retains the original format, >> >> and the user can choose to convert it by himself. >> >> >> >> >> >> >> >> -- >> >> >> >> 此致！Best Regards >> >> 陈明雨 Mingyu Chen >> >> >> >> Email: >> >> chenmin...@apache.org >>
