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• Notice - 20090219

  We have tested our NHA-EXT2 on several SSD for a month. - workstation: DELL PowerEdge T105 - workload: developer environment - SSD: MTRON(MSP-SATA7035-064), Samsung(MCCOE64G) There is no bug so far. We are monitoring NHA-EXT2 now.

  posted by kjhnet 324 days ago

• 13th report

  At present, we are developing the NHA-cleaner, but it is difficult to develop the NHA-cleaner. So developing the NHA-cleaner may takes some time. * plans 1. Researchs in the past survey 2. The architecture of NHA-cleaner design 3. Implementation of the NHA-cleaner on linux 4. Test and analysis

  posted by samoman 344 days ago

• 12th week report

  1. We faced some problem which was understanding the linux kernel page cache while we modified the source code of ext2 file system. 2. The present progressing rate of this project is 85% of total rate.

  posted by yongsuk 397 days ago

• nha-ext2-proj nha-ext2-proj file released: nha-ext2-proj.tar.gz

  posted 397 days ago

• File released: /nha-ext2-proj/nha-ext2-proj/nha-ext2-proj.tar.gz

  posted 397 days ago

• 11th week report

  1. We have upgraded the allocation policy of the ext2 and experimented the performace of the system that applied the ext2. 2. The present progressing rate of this project is 70% of total rate.

  posted by samoman 410 days ago

• 10th week report

  1. We are studying the block layer of linux-kernel to implement segment writing. 2. We are making proto-type implementation of segments writing.

  posted by kjhnet 416 days ago

• 9th week report

  We are upgrading NHA-Ext2 allocation policy. Current version of NHA-Ext2 shows slightly low performance. Therefore modification should be required. And we are also upgrading Postmark benchmark source for accurate experiments.

  posted by nha-ext2 416 days ago

• 8th week report

  1. In order to implement New Hybrid Allocation policy,we have studied the delayed allocation and the page cache in the ext2 file system. 2. We faced some problem which was understanding the linux vfs layer while we modified the source code of ext2 file system.

  posted by yongsuk 428 days ago

• 7th week report

  * To optimize the SSD performance, filesystem have to write like the LFS(Log-Struct filesystem)'s allocation policy. So, we are modifying the allocation policy of ext2 filesystem as the LFS. We expect that the performance of modified ext2 will improve.

  posted by samoman 436 days ago