Hi Liu, For small data set, I suggest you use MemoryIDMigrator for experiment.
Jeff Zhang On Wed, Dec 23, 2009 at 3:48 AM, 刘逸哲 <[email protected]> wrote: > Hi,zhang > Could you give some example show how to use it? > > -----邮件原件----- > 发件人: Jeff Zhang [mailto:[email protected]] > 发送时间: 2009年12月23日 19:41 > 收件人: [email protected] > 主题: Re: Does the FileDataModel still require the UserID and ItemID numeric? > > Hi 刘, > > In the mahout 0.20, the user and item id must be long type. It is for > performance. > If your data model's id is string type , you should implement the interface > IDMigrator which help you convert string to long. There's also some > implementation such as MySQLJDBCIDMigrator in mahout which you can refer > to. > > > Jeff Zhang > > > > On Wed, Dec 23, 2009 at 3:15 AM, 刘逸哲 <[email protected]> wrote: > > > I saw this "Further, this ID value must be > > numeric; it is a Java long type through the APIs" in the taste > documation. > > But in the javadoc of FileDataModel,there is "The user and item IDs are > > ready literally as Strings and treated as such in the API" > > Does it mean that userID and ItemID could be string now, for example, my > > data is look like this: > > "Auser,apple,1 > > User2,banana,2 > > User3,car,3" > > Could I use FileDataModel directly? > > Thanks > > > > > > > > This email (including any attachments) is confidential and may be legally > > privileged. If you received this email in error, please delete it > > immediately and do not copy it or use it for any purpose or disclose its > > contents to any other person. Thank you. > > > > > > > 本电邮(包括任何附件)可能含有机密资料并受法律保护。如您不是正确的收件人，请您立即删除本邮件。请不要将本电邮进行复制并用作任何其他用途、或透露本邮件之内容。谢谢。 > > >
