After the SP1 release of SharePoint 2010, product team changes offcially the boundaries limits of SharePoint.
You can consult all this new limits in the "SharePoint Server 2010 capacity management: Software boundaries and limits" page on MSDN here:
One of the most important thing is the new recommandation about the size limit of the content databases:
Content database size
(general usage scenarios)
200 GB per content database
We strongly recommended
limiting the size of content databases to 200 GB, except when the
circumstances in the following rows in this table apply.
If you are using Remote BLOB
Storage (RBS), the total volume of remote BLOB storage and metadata in the
content database must not exceed this limit.
Content database size (all
4 TB per content database
Content databases of up to 4
TB are supported when the following requirements are met:
- Disk sub-system performance of 0.25 IOPs per GB. 2 IIOPs per GB is recommended for optimal performance.
- You must have developed plans for high availability, disaster recovery, future capacity, and performance
You should also carefully
consider the following factors:
- Requirements for backup and
restore may not be met by the native SharePoint Server 2010 backup for
content databases larger than 200 GB. It is recommended to evaluate and test
SharePoint Server 2010 backup and alternative backup solutions to determine
the best solution for your specific environment.
- It is strongly recommended to
have proactive skilled administrator management of the SharePoint Server 2010
and SQL Server installations.
- The complexity of
customizations and configurations on SharePoint Server 2010 may necessitate
refactoring (or splitting) of data into multiple content databases. Seek
advice from a skilled professional architect and perform testing to determine
the optimum content database size for your implementation. Examples of
complexity may include custom code deployments, use of more than 20 columns
in property promotion, or features listed as not to be used in the over 4 TB
- Refactoring of site
collections allows for scale out of a SharePoint Server 2010 implementation
across multiple content databases. This permits SharePoint Server 2010
implementations to scale indefinitely. This refactoring will be easier and
faster when content databases are less than 200 GB.
- It is suggested that for ease
of backup and restore that individual site collections within a content
database be limited to 100 GB. For more information, see Site
For more information on
SharePoint Server 2010 data size planning, see Storage and SQL Server capacity planning and
configuration (SharePoint Server 2010).
Content databases of over 4
TB, except for use in document archive scenarios (described in the row
below), are not recommended. Upgrading of site collections within these
content databases is likely to be very difficult and time consuming.
It is strongly recommended
that you scale out across multiple content databases, rather than exceed 4
TB of data in a single content database.