... please to announce POHMEL high performance network filesystem. POHMELFS stands for Parallel ... This release brings following features: * Fast transactions. System will wrap all writings ... failure. Details in notes [1]. * Failover. It is now possible to ...

linux-kernel - Evgeniy Polyakov - May 13 2008 - 13:45

... to announce POHMEL high performance network filesystem. > POHMELFS stands for Parallel ... release brings following features: > * Fast transactions. System will wrap all writings ... of failure. > Details in notes [1]. > * Failover. It is now possible to ...

linux-kernel - Jeff Garzik - May 13 2008 - 15:09

... to support the case where the server filesystem dataset > > does not fit entirely on one ... for high LAN file performance similar to what you report with POHMELFS and ... fs, while also supporting database style transactions and coherent queries, in a self- ...

linux-kernel - Jamie Lokier - May 13 2008 - 20:52

... for high LAN file performance > similar to what you report with POHMELFS and ... fs, while also supporting database style transactions and > coherent queries, in a self- ... special purpose (like databasefs or whatever) filesystems will get the niche. IMHO of ...

linux-kernel - Evgeniy Polyakov - May 14 2008 - 03:57

... is coming to be a filesystem too. It has many qualities ... high LAN file performance > similar to what you report with POHMELFS ... while also supporting database style transactions and > coherent queries, in a ... know BTRFS nor CRFS or POHMELFS but i will take a ...

linux-kernel - Florian Wiessner - May 13 2008 - 21:16

... storage device is usually slower than network wire speed. > > Multiple nodes helps ... but POHMELFS client design was > specially created to increase network performance ... but can not easily increase network > bandwidth. Actually experiments with async ...

linux-kernel - Evgeniy Polyakov - May 14 2008 - 18:50

... in approrpiate address space/inode operations. Transactions follow netlink (which is very ugly ... header corresponds to any command (except transaction header). So one can pack ( ... cases. So far POHMELFS does not work as distributed filesystem, so it should ...

linux-kernel - Evgeniy Polyakov - May 13 2008 - 16:51

... if your connection between the DB-servers have high latency/many hops. Did FUSE start to ... ) greatly increases performance. If you are using async processing (like POHMELFS, iirc it is the only such approach in networked fs, cifs/smbfs and others wait ...

linux-kernel - Evgeniy Polyakov - May 14 2008 - 04:10

... change writeback path for POHMELFS to test things. If there will not be any performance degradataion (and I believe there will not be, ... long as no improvements, since tests were always network bound), I will use that approach. -- ...

linux-kernel - Evgeniy Polyakov - May 14 2008 - 09:56

... multiple connections is worse for high-performance networks and is a great win ... , but reduce opportunities to aggregate transactions into fewer > message. It's an ... with different > optimal results for different networks. Probably idea I described in ...

linux-kernel - Evgeniy Polyakov - May 14 2008 - 18:02

... multiple connections is worse for high-performance networks > and is a great win ... but reduce opportunities to aggregate transactions into fewer > > message. It's ... different > > optimal results for different networks. > > Probably idea I described in ...

linux-kernel - Jamie Lokier - May 14 2008 - 18:28

... storage device is usually slower than network wire speed. > Multiple nodes helps remove ... , but POHMELFS client design was specially created to increase network performance as ... ), but can not easily increase network bandwidth. But, as was already noted ...

linux-kernel - Evgeniy Polyakov - May 14 2008 - 18:41

... ' client protocol already, there are transactions, which are only committed completed, when ... that they are, there is also failover reconnection and timeout detection features as ... these things are only necessary for > performance in scenarios you might not ...

linux-kernel - Evgeniy Polyakov - May 15 2008 - 03:34

... that's how things exist today - POHMELFS client connects to number > of servers ... including telling the client if the transaction failed or succeeded (as it ... to additional replicas before the transaction may proceed. Jeff -- To unsubscribe ...

linux-kernel - Jeff Garzik - May 14 2008 - 17:34

... probably a lot), so I will extend writeback path of the POHMELFS not to kmap pages, but instead use ->sendpage(), which if ... shared structure or use per-page wait. Right now there are transactions (and they will be used for all operations eventually), so ...

linux-kernel - Evgeniy Polyakov - May 14 2008 - 03:40

... a lot), so I will extend writeback path of the POHMELFS > not to kmap pages, but instead use ->sendpage(), which ... wait. That sounds exactly like wait_on_page_writeback()? > Right now there are transactions (and they will be used > for all operations ...

linux-kernel - Andrew Morton - May 14 2008 - 04:01

... > connects to the control and data networks, and performs the necessary > load/store operations. > > Personally, I think the most simple thing ... Well, that's how things exist today - POHMELFS client connects to number of servers and can ...

linux-kernel - Evgeniy Polyakov - May 14 2008 - 17:19

... complex" clients must join the data network. Hardware manufacturers are putting so much ... quick action to commit/abort the transaction. You can even shortcut the process ... to the control and data networks, and performs the necessary load/store operations ...

linux-kernel - Jeff Garzik - May 14 2008 - 16:37

... 45:24 +0400 Evgeniy Polyakov wrote: > I'm please to announce POHMEL high performance network filesystem. If any thread takes more than one kmap() at a time, it is deadlockable. Because there ...

linux-kernel - Andrew Morton - May 14 2008 - 02:33

... desired robustness in the event of > > node/network failures. During any time while the ... when possible. E.g. as a filesystem, during netsplits you might configure the ... down. If all changes (or generally, transaction traces) to /home/user1 are in ...

linux-kernel - Jamie Lokier - May 14 2008 - 17:19