> > > > - besize template 'aAuU', anything else tempplate I can use to > > > > prepare fix length data ? - if yes, but how do I assuming the > > > > block size is? In case, if I write a binary file and I wanna > > > > use seek. > > > > > > You are going to have to explain that in more detail. > > > > In case, I am doing something like a log with User v TimesOfSignIn. > > So, user name will set as 30 char long, and the Signin times is about > > in scope of a normal integer. I wanna make this a simple DB for this > > but not a list of single files for each user. So I wanna make this > > doable for ramdom read write, so, that should be in a binary file. > > You want to have a look at DBM files. Read > perldoc DB_File > or > perldoc SDBM_File > > Or you may try to install DBD::SQLite. That would give you the full > power of SQL without having to install anything but the module. > > > However, as the file is in a binary, I think there could be a size > > benfit for me to compress the data length. > > "Premature optimization is the root of all evil." > > How many users are we talking about? Millions? I would not sweat over > a few KB you might save.
Yes, that's very right, I should have to do that with some db modules!!! I am sorry I missed something to declare here . I just do it as an experiment to know and learn how pack works in this ways. So, I still looking for a pack way to get this job done. Actaully, I am still quite confuse on what I can expect pack and unpack can giving help to me, in furture. I guess I would have some light to know what pack is while this get done. Would you help for a little bit more ? Thanks in advise.
