... -quality by the December release. Hammer Filesystem (I) General Storage Abstraction ... effect of this is that HAMMER is fairly loose when it ... of conflict through identifier reuse. HAMMER typically iterates object identifiers sequentially ...

dragonflybsd-kernel - Matthew Dillon - Oct 10 2007 - 15:33

... to recovery corruption generated by the filesystem code itself or corruption caused by ... gives you redundancy. Replication coupled with HAMMER's historical data store gives ... it properly would require HAMMER to support a 'filesystem within a ...

dragonflybsd-kernel - Matthew Dillon - Oct 10 2007 - 21:14

... . Locality of reference is important. HAMMER will also be able to issue ... amount of parallelism supported by the filesystem. HAMMER uses a index-record-data ... that into the design. Finally, HAMMER is designed to allow clusters- ...

dragonflybsd-kernel - Matthew Dillon - Oct 13 2007 - 20:59

... to recovery corruption generated by the filesystem > code itself or corruption caused by ... you redundancy. Replication > coupled with HAMMER's historical data store gives ... it properly would > require HAMMER to support a 'filesystem within a ...

dragonflybsd-kernel - Michael Neumann - Oct 11 2007 - 04:07

... For example, if you had a HAMMER filesystem backed by two volumes you ... is logical replication of the entire filesystem. A logical replication allows the different ... to retain varying amounts of filesystem history. For example, your production ...

dragonflybsd-kernel - Matthew Dillon - Oct 10 2007 - 18:38

... independant > (logical) copies of the filesystem, they can also all be ... logical replication of the entire > filesystem. That is, wholely independant copies ... -other-daemons resource thirst. > Ultimately HAMMER's mirroring features will be ...

dragonflybsd-kernel - Bill Hacker - Oct 10 2007 - 18:36

... independant (logical) copies of the filesystem, they can also all be ... logical replication of the entire filesystem. That is, wholely independant copies ... machines in different locations. Ultimately HAMMER's mirroring features will be ...

dragonflybsd-kernel - Matthew Dillon - Oct 10 2007 - 17:25

... have their own namespace in the :filesystem? : :Wow! I a am really looking ... Records are typed so any given filesystem object can contain multiple key spaces. ... directly accessible by userland. A HAMMER-aware database would be able to ...

dragonflybsd-kernel - Michael Neumann - Oct 11 2007 - 04:18

... answered before, but how :does Hammer handle quotas? Filesystems like XFS and ZFS ... . It seems to me that Hammer could manage quotas as a : ... and the quota state can be updated on the fly when a ... t planning on implementing quotas in HAMMER for 2.0 but it's ...

dragonflybsd-kernel - Matthew Dillon - Oct 13 2007 - 19:36

... and the quota state can be updated on the fly when a ... t planning on implementing quotas in HAMMER for 2.0 > but it's ... to say that quota support for Hammer in 2.0 was the ... a feature-rich and modern filesystem approach, users will eventually appreciate ...

dragonflybsd-kernel - Thomas Zander - Oct 13 2007 - 22:51

... the quota state can be updated on the fly when a ... planning on implementing quotas in HAMMER for 2.0 >> but it' ... say that quota support for Hammer in 2.0 > was the ... a > feature-rich and modern filesystem approach, users will eventually > appreciate ...

dragonflybsd-kernel - Bill Hacker - Oct 14 2007 - 07:31

:Matthew Dillon writes: :> mkfilesystem /hammer/my_source_backup :> replicate /elsewhere/my_source /hammer/ ... to backup the entire change history of the filesystem? :) :------ :Dave Hayes - Consultant - Altadena CA, USA - ...

dragonflybsd-kernel - Matthew Dillon - Oct 11 2007 - 13:17

... > The objects and records making up a HAMMER filesystem is organized into > a single, unified ... multiple I/O threads accessing a single HAMMER filesystem? Shared/exclusive mutexes on the cluster level? (Whomever invented early mornings does ...

dragonflybsd-kernel - Thomas E. Spanjaard - Oct 11 2007 - 02:04

Matthew Dillon wrote: > (VI) Database files > > HAMMER uses 64 bit keys internally and makes key-based ... 3)? Do they have their own namespace in the filesystem? Wow! I a am really looking forward to try out HAMMER!!! Regards, Michael

dragonflybsd-kernel - Michael Neumann - Oct 10 2007 - 19:12

Matthew Dillon writes: > mkfilesystem /hammer/my_source_backup > replicate /elsewhere/my_source /hammer/ ... to backup the entire change history of the filesystem? :) ------ Dave Hayes - Consultant - Altadena CA, USA - dave@ ...

dragonflybsd-kernel - Dave Hayes - Oct 11 2007 - 02:37

... not been implicitly answered before, but how does Hammer handle quotas? Filesystems like XFS and ZFS maintain quota information internally so that a ... not take ages. It seems to me that Hammer could manage quotas as a part of its ...

dragonflybsd-kernel - Thomas Zander - Oct 13 2007 - 13:24

I am going to start committing bits and pieces of the HAMMER filesystem over the next two months. Note that the filesystem will not be operational until we ... backup/mirroring data stream and the filesystem relies a lot more on ...

dragonflybsd-kernel - Matthew Dillon - Oct 10 2007 - 14:41

... necessary? Probably not. Consider a replicated > filesystem with each copy backed by an array ... a disk failure. The copy of the filesystem containing the disk > failure loses a ... a RAID1, and that is all HAMMER provides; the point of RAIDZ (and ...

dragonflybsd-kernel - Thomas E. Spanjaard - Oct 10 2007 - 19:45

... all of these features to be ready and the > filesystem to be beta-quality by the December release. > > > Hammer Filesystem > *snip* Matt, Awesome! Tells me: "ZFS, bend over, grab your ankles and kiss ...

dragonflybsd-kernel - Bill Hacker - Oct 10 2007 - 16:30

... of these features to be ready and the >> filesystem to be beta-quality by the December release. > ... network layers, etc... According to Matt's design document: "All information in a HAMMER filesystem is CRCd to detect corruption." ...

dragonflybsd-kernel - Michael Neumann - Oct 11 2007 - 03:55