About :: TODO :: Blog :: RSS :: Old blog :: Projects :: GIT :: Gallery :: Notes

Sun, 25 May 2008

New POHMELFS release. Full transaction support. Data and metadata cache coherency.

Irish Tullamore Dew helped this POHMELFS release to see the light.

Short changelog:

• Full transaction support for all operations (object creation/removal, data reading and writing). Data reading transactions are not optimal yet and will be improved in the next release (although fast).
• Data and metadata cache coherency support. More details on how this is implemented one can find in appropriate section.
• Transaction timeout based resending. If given transaction did not receive reply after specified timeout, transaction will be resent (possibly to different server).
• Switched writepage path to ->sendpage() which improved performance and robustness of the writing.
• Preliminary support for parallel data processing. Code to write data to multiple servers in parallel and balance reading between them was imported, but is not used right now.
• Fair number of bugfixes.

• Improved reading transactions.
• Server redundancy extensions (ability to store data in multiple locations according to regexp rules, like '*.txt' in /root1 and '*.jpg' in /root1 and /root2.
• Client parallel extensions: ability to write to multiple servers and balance reading between them. Code was imported to the current version, but not enabled yet.
• Client dynamical server reconfiguration: ability to add/remove servers from working set by server command and from userspace.
• Start generic server distribution development.

/devel/fs :: Link / Comments ()