#1 IBM solidDB
solidDB is IBM's in-memory database that can be embedded directly into application. It supports standard application interfaces such as SQL, JDBC and ODBC. solidDB is good for critical applications as it keeps two copies of databases and can restore data in seconds in case of failover.
IBM allows you to download and use trial version for 90 days. This Developerworks article is a nice starter tutorial to build PHP based dynamic webpages with imbedded solidDB.
License: see the website above
#2 SQLite
SQLite is a freely available and widely used imbedded database engine. It is claimed as a zero configuration database which does not need to be installed or setup or configured in order to use.
Features:
- cross platform file format - once database file is written, can be used on any machine and any architecture. No need to backup and restore because all architecture and machine utilize the same format.
- ultra compact - everything included, whole SQlite is 275 KB in size.
- supports VARCHAR
- Manifest typing - datatype is decided by the column value itself and not the column type
- supports SQL extensions
License:
quoted from SQlite webpage:
"SQLite source code contains no license since it is not governed by copyright. Instead of a license, the SQLite source code offers a blessing:
May you do good and not evil
May you find forgiveness for yourself and forgive others
May you share freely, never taking more than you give."
There are few more choices such as Firebird and Oracle BerkeleyDB. I am currently evaluating the above two for my embedded db project. I will add my implementation findings to this post, so check back next week.
May you do good and not evil
May you find forgiveness for yourself and forgive others
May you share freely, never taking more than you give."
There are few more choices such as Firebird and Oracle BerkeleyDB. I am currently evaluating the above two for my embedded db project. I will add my implementation findings to this post, so check back next week.
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