Re[2]: [zfs-discuss] RAM size tuning for ZFS file servers...

2006-05-14 Thread Robert Milkowski
Hello Erik, Friday, May 12, 2006, 10:34:58 PM, you wrote: ET> So, I'll be using this: ET> 3 x Sun 3511FC SATA JBODs, each with 12 400GB disks. The setup is a ET> 11-wide stripe of 3-disk RAIDZ vdevs, with the remain 3 drives as ET> hot-spares. They'll attach to x4200 Opterons or V440 Sparcs as

Re[4]: [zfs-discuss] Re: Re: Due to 128KB limit in ZFS it can't saturate disks

2006-05-14 Thread Robert Milkowski
Hello Roch, Friday, May 12, 2006, 5:31:10 PM, you wrote: RBPE> Robert Milkowski writes: >> Hello Roch, >> >> Friday, May 12, 2006, 2:28:59 PM, you wrote: >> >> RBPE> Hi Robert, >> >> RBPE> Could you try 35 concurrent dd each issuing 128K I/O ? >> RBPE> That would be closer to how ZFS w

Re[5]: [zfs-discuss] Re: Re: Due to 128KB limit in ZFS it can't saturate disks

2006-05-14 Thread Robert Milkowski
Hello Robert, Sunday, May 14, 2006, 10:55:42 PM, you wrote: RM> Hello Roch, RM> Friday, May 12, 2006, 5:31:10 PM, you wrote: RBPE>> Robert Milkowski writes: >>> Hello Roch, >>> >>> Friday, May 12, 2006, 2:28:59 PM, you wrote: >>> >>> RBPE> Hi Robert, >>> >>> RBPE> Could you try 35 con

Re[2]: [zfs-discuss] Re: Problems with ZFS and 3511 JBODs

2006-05-14 Thread Robert Milkowski
Hello James, Sunday, April 30, 2006, 12:40:09 PM, you wrote: JCM> Robert Milkowski wrote: >> I can also say it's not MPxIO - I turned it off imported pool and have >> the same bahaviour. I also tried to turn off write cache using format -e >> on all disks in a pool - no effect (however I'm not su

[zfs-discuss] Sparse file support in Java?

2006-05-14 Thread Gehr, Chuck R
Does anyone know if there is support in Java for creating holes in a sparse file (like one can do via fcntl(F_FREESP) in C)? Would like to avoid writing JNI code if there is already support for this somewhere in the JDK. Chuck ___ zfs-discuss ma