... storage. At the moment mtime/atime updates require generating UNDO records and, ... /mtime issue is now complete. WYSIWYG. HAMMER's performance is extremely good now, ... I redo the deadlock avoidance algorithms. HAMMER is within 10% of UFS's ...

dragonflybsd-kernel - Matthew Dillon - Jun 20 2008 - 02:23

... Here's an update on the HAMMER work! Current status: * Passes ... several little-ticket items left. HAMMER will officially go Alpha when ... 0 release in July. Additional HAMMER capabilities (no timeline yet) * Adding ...

dragonflybsd-kernel - Matthew Dillon - Mar 23 2008 - 22:57

... its directory entry both still present. * Updates to the inode_data, which holds the ... are chflagged 'nohistory'. The bane of HAMMER's design is that we absolutely ... do massive aggregation of serial number updates. Besides, how big a performance ...

dragonflybsd-kernel - Matthew Dillon - Jun 20 2008 - 12:57

... :into HAMMER yet. : :Will the FS have the same atomic update features ... messages in lost+found. Basically yes. HAMMER maintains a dependancy hierarchy for directory ... not actually make things any faster. HAMMER's fsync might return early ...

dragonflybsd-kernel - Matthew Dillon - Jun 20 2008 - 14:20

... > :into HAMMER yet. > : > :Will the FS have the same atomic update features ... messages in lost+found. > > Basically yes. HAMMER maintains a dependancy hierarchy for ... actually make > things any faster. > > HAMMER's fsync might return early ...

dragonflybsd-kernel - Johannes Hofmann - Jun 21 2008 - 10:41

... the filesystem. I will add a 'hammer pruneall' command for emergencies which will do the same thing that 'hammer prune everything' does now. There are ... also be responsible for multi-master updates. For the release we will have ...

dragonflybsd-kernel - Matthew Dillon - Jun 22 2008 - 20:05

Here's another update on the state of HAMMER for the release! ... full history mode, and later run hammer prune. This sequence located a number ... mirroring work properly. Buffer cache work HAMMER uses mixed block sizes and under ...

dragonflybsd-kernel - Matthew Dillon - Jun 28 2008 - 20:16

... new commit is streaming mirroring between two HAMMER filesystems! Streaming mirroring is in a ... the latest fully synchronized TID, and HAMMER munges atime/mtime/st_dev so they ... cd /usr/obj/pfs1 <--- re-CD updates TID SLAVE# pwd /usr/obj/@@ ...

dragonflybsd-kernel - Matthew Dillon - Jul 31 2008 - 19:13

... etc... when you do those operations HAMMER caches them in a virtualization layer in ... or soft links, not truncations, nothing. HAMMER uses a modified B+Tree for ... critical path, and neither does HAMMER. Putting in better balancing and ...

dragonflybsd-kernel - Matthew Dillon - Jun 16 2008 - 17:37

... way through it. Meta-data updates to the disk media have ... so mount can see the updated undo info. * Then I have ... point in the above sequence, HAMMER will be able to run ... any partially written meta-data. HAMMER would be able to do ...

dragonflybsd-kernel - Matthew Dillon - Apr 24 2008 - 17:57

... blogbench. It turns out that HAMMER isn't quite as horrible ... 34 15668 52 13569 135 HAMMER is the opposite. It can ... write performance, particularly inconsistencies in HAMMER's performance numbers. There are ...

dragonflybsd-kernel - Matthew Dillon - Jun 11 2008 - 20:27

... etc... when you do those operations HAMMER caches them in a > virtualization layer ... or soft links, not truncations, nothing. > > HAMMER uses a modified B+Tree for ... By adding a right > bounding element HAMMER can cache pointers into its B ...

dragonflybsd-kernel - Erik Wikström - Jun 17 2008 - 13:42

... I will again recommend that people testing HAMMER update and newfs_hammer your filesystems. 53D ... by the flusher, which are not subject to kernel restrictions, can 'take over' ... B-Tree operations appear to be HAMMER's only major hangup right now ...

dragonflybsd-kernel - Matthew Dillon - Jun 9 2008 - 21:08

... information in the nodes? : :-- :Dmitri Nikulin HAMMER has an independant B-Tree for ... a cluster needs to be recovered, HAMMER will simply throw away the B ... on a cluster-by-cluster basis. HAMMER doesn't bother to scan clusters ...

dragonflybsd-kernel - Matthew Dillon - Nov 5 2007 - 16:27

... something like this: set timestamp = `hammer now` cpdup /mountpoint/@@$timestamp targethost:/ ... into your filesystem. set timestamp = `hammer stamp 60s` <------ doesn't sync ... of replication), with both running HAMMER, but only retain a limited ...

dragonflybsd-kernel - Matthew Dillon - Mar 25 2008 - 01:26

... occurs beyond the control of the HAMMER filesystem code. -- NEW MAILING LIST ... created a new mailing list (hammer[-request]@dragonflybsd.org) for people ... for porters only. All general HAMMER bug reports and comments unrelated ...

dragonflybsd-kernel - Matthew Dillon - Aug 6 2008 - 11:56

... by wiping their private key. For HAMMER, the solution is fairly straightforward... ... manage access rights for each client. HAMMER itself would handle local encryption and ... or the client could just ask HAMMER to decrypt its half using its ...

dragonflybsd-kernel - Matthew Dillon - Jan 30 2008 - 14:25

... the 16K single-record writes HAMMER :> does now. This should also, ... to stress other areas of HAMMER or in order to simulate ... then the write-rate on HAMMER. The higher write rate on ... of writer threads to get HAMMER's write rate down closer ...

dragonflybsd-kernel - Matthew Dillon - Jun 17 2008 - 13:01

... :05 pm, Matthew Dillon wrote: > Heads up - 'hammer prune' is being removed, ' ... the filesystem. I will add a > 'hammer pruneall' command for emergencies which will do the same thing > that 'hammer prune everything' does now. Syntactically, ...

dragonflybsd-kernel - Justin C. Sherrill - Jun 22 2008 - 20:34

Here's another update on HAMMER's progress. As people know, HAMMER is basically ready for release minus the mirroring ... I may not get in by the release). Once HAMMER does formally track the demarcation points it won' ...

dragonflybsd-kernel - Matthew Dillon - Jun 25 2008 - 17:16