search for: maxphi

Greeting ALL Can someone explain to me why I was successfully able issue (through application) an I/Os of 128K each (monitored by DTrace) while my Maxphys=56K only ?????? My understanding is that Maxphys is the max I/O size that the storage device can handle for a single I/O, it has been well documented that if and application issued an I/O larger than Maxphys, it would be break down to

Hi Should I tune maxphys on a box with 8 or more SCSI drives if I''m running ZFS with raidz arrays? Is this just for UFS or will I get better results in ZFS as well? Are there any other things I should tune on my box to get the most out of ZFS. James Dickens uadmin.blogspot.com

Hi, I''m preparing a personal TPC-H benchmark. The goal is not to measure or optimize the database performance, but to compare ZFS to UFS in similar configurations. At the moment I''m preparing the tests at home. The test setup is as follows: . Solaris snv_37 . 2 x AMD Opteron 252 . 4 GB RAM . 2 x 80 GB ST380817AS . Oracle 10gR2 (small SGA (320m)) The disks also contain the OS

...pened with multiple Monte Carlo datasets, and a few different (but very similar) likelihood functions. (They are complicated, but I can send them to someone if desired.)* Instead I try to use optim() for my optimization needs but it fails when finding the 0/0: " Error in optim(c(phi[, k]), maxphi, lower = 0.01, upper = 0.99, method = "L-BFGS-B") : L-BFGS-B needs finite values of 'fn' In addition: There were 50 or more warnings (use warnings() to see the first 50) " Any suggestions? Harlan Campbell McGIll University [[alternative HTML version deleted]]

I was trying to simply test bandwidth that Solaris/ZFS (Nevada b63) can deliver from a drive, and doing this: dd if=(raw disk) of=/dev/null gives me around 80MB/s, while dd if=(file on ZFS) of=/dev/null gives me only 35MB/s!?. I am getting basically the same result whether it is single zfs drive, mirror or a stripe (I am testing with two Seagate 7200.10 320G drives hanging off the same interface

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hi, i have two systems, A (Solaris 10 update 5) and B (Solaris 10 update 6). i''m using ''zfs send -i'' to replicate changes on A to B. however, the ''zfs recv'' on B is running extremely slowly. if i run the zfs send on A and redirect output to a file, it sends at 2MB/sec. but when i use ''zfs send

Hi all, I was intending on trying out gjournal on a new disk i've added in my desktop. I had a look to see what the most recent patch provided by Pawel and found http://people.freebsd.org/~pjd/patches/gjournal6_20061024.patch I created the directories as per Pawel's original post (http://lists.freebsd.org/pipermail/freebsd-fs/2006-June/001962.html) and the patch succeeded with no failed