HAMMER Approaches Alpha Status
(Tue, 25 Mar 2008 13:49:48 +0000)
Matthew Dillon posted on update on his evolving HAMMER filesystem, noting that it "passes all standard filesystem stress tests and buildworld will run with a HAMMER /usr/obj". He also noted, "pruning and reblocking code is in and partially tested, but now needs more stringent testing; full historical access appears to be working but needs testing." He added, "there are two big-ticket and several little-ticket items left. HAMMER will officially go Alpha when the big-ticket items are done, and beta when we get a few of the little-ticket items done." The two "big-ticket" items left to be completed are UNDO crash recovery code, and handling for full filesystems. Matt summarized:
"I have no time frame for these items yet. It will depend on how quickly HAMMER moves to Alpha and Beta status. I will say, however, now that HAMMER's on-disk format has solidified, that I have a very precise understanding of the protocols that will be needed to accomplish fully cache coherent remote access for both replicated and non-replicated (remote mount style) access. And, as you know, fully coherent filesystem access across machines is going to be the basis for DragonFly's clustering across said machines. In summary, things are progressing very well."