DBD::SQLite 0.11 is now on CPAN. This upgrades to SQLite 2.4.0, adding views and a few other niceties. I also had to fix the transaction model because running under mod_perl with Apache::DBI it continuously locked up solid. This was because under AutoCommit=0, I would immediately do a "BEGIN TRAN", which locked the database, and even when I issued a commit, it would do "COMMIT TRAN" followed by another "BEGIN" immediately. So now it only does "BEGIN TRAN" when you actually execte some SQL, and just flags whether I'm in a transaction or not. I believe this is how DBD::Sybase does it too.
I also found a couple of bugs in the core SQLite library, which I mailed the author about and he said he'd fix them in the next release (they're nothing major - just cause compiler warnings).
I also wonder if there are any free vector/text based solutions out there (besides csv/dbm).
Thanks for the info. I *do* take interest in these posts, in case our Oracle server is taken from us.
Re:This has me wondering...
Matts on 2002-03-13T23:57:03
I wonder what the performance is on huge (over 1 GB) unindexed tables, say using a basic 'select'.
Why don't you find out for me?Re:This has me wondering...
djberg96 on 2002-03-14T14:37:04
Damn. I was hoping you already had something set up.:) If I get a chance, I'll give it a shot in the next couple of weeks.
Oh, and in case anyone wants a rough comparison of an RDMS versus a commercial text-based solution (in our case, it was BRS by Dataware Technologies), we had eight databases joined, at roughly 4 GB per database, and I could get about 100,000 results in less than a second. With Oracle, I hit my IO limits on a single unindexed 1GB table before I get results.
And you only think I'm exaggerating.
Re:PPM?
Matts on 2002-03-14T09:56:44
Most of my other modules are on Randy Kobe's archive. It would probably be best to coordinate with him, I think...Re:PPM?
lachoy on 2002-03-14T11:38:21
No problem, will do. I'll let you know when I get something usable.Re:PPM?
Matts on 2002-03-15T08:20:08
OK, Randy now has it in his archive.Re:PPM?
lachoy on 2002-03-15T12:45:33
Cool. I emailed Randy and it seems like we might setup a mirror between the sites, so he can have whatever gets put up on mine and vice versa.
