similar to: Maxphys and ZFS

I executed sync just before this happened.... ultra:ultra# mdb -k unix.0 vmcore.0 Loading modules: [ unix krtld genunix specfs dtrace ufs sd pcipsy md ip sctp usba fctl nca crypto zfs random nfs ptm cpc fcip sppp lofs ] > $c vpanic(7b653bd8, 7036fca0, 7036fc70, 7b652990, 0, 60002d0b480) zio_done+0x284(60002d0b480, 0, a8, 7036fca0, 0, 60000b08d80) zio_vdev_io_assess+0x178(60002d0b480, 8000,

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, We have a number of 4200''s setup using a combination of an SVM 4 way mirror and a ZFS raidz stripe. Each disk (of 4) is divided up like this / 6GB UFS s0 Swap 8GB s1 /var 6GB UFS s3 Metadb 50MB UFS s4 /data 48GB ZFS s5 For SVM we do a 4 way mirror on /,swap, and /var So we have 3 SVM mirrors d0=root (sub mirrors d10, d20, d30, d40) d1=swap (sub mirrors d11, d21,d31,d41)

Hi Here is System tap''s representives response to my comments and mine back to that list. Since it was on a public mailing list i''m reposting here, since there is obvious interest. James Dickens uadmin.blogspot.com ---------- Forwarded message ---------- From: James Dickens <jamesd.wi at gmail.com> Date: Sep 13, 2006 1:51 PM Subject: Re: Systemtap vs Dtrace web page

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

OK, I know that there''s been some discussion on this before, but I''m not sure that any specific advice came out of it. What would the advice be for supporting a largish number of users (10,000 say) on a system that supports ZFS? We currently use vxfs and assign a user quota, and backups are done via Legato Networker. >From what little I currently understand, the general

After multiple power outages caused by storms coming through, I can no longer access /dev/zvol/dsk/poolname, which are hold l2arc and slog devices in another pool I don''t think this is related, since I the pools are ofline pending access to the volumes. I tried running find /dev/zvol/dsk/poolname -type f and here is the stack, hopefully this someone a hint at what the issue is, I have

> Matthew Ahrens wrote: > > Ross Newell wrote: > >> What are this issues preventing the root directory being stored on > >> raidz? > >> I''m talking specifically about root, and not boot which I can see > >> would be > >> difficult. > >> > >> Would it be something an amateur programmer could address in a > >>

Not sure if this document will be shown to any dtrace users but here is a link if you want to comment on it http://sources.redhat.com/systemtap/wiki/SystemtapDtraceComparison I have went line by line and commented on its content and in accuracies and posted it both to the systemtap email list and my blog, you can see the blogged version at

Dear all, we''re currently looking forward to restructure our hardware environment for our datawarehousing product/suite/solution/whatever. We''re currently running the database side on various SF V440''s attached via dual FC to our SAN backend (EMC DMX3) with UFS. The storage system is (obviously in a SAN) shared between many systems. Performance is mediocre in terms

Hi All, I posted this in a different threat, but it was recommended that I post in this one. Basically, I have a 3 drive raidz array on internal Seagate drives. running build 64nv. I purchased 3 add''l USB drives with the intention of mirroring and then migrating the data to the new USB drives. I accidentally added the 3 USB drives in a raidz to my original storage pool, so now I have 2

This may not be the answer you''re looking for, but I don''t know if it''s something you''ve thought of. If you''re pulling a LUN from an expensive array, with multiple HBA''s in the system, why not run mpxio? If you ARE running mpxio, there shouldn''t be an issue with a path dropping. I have the setup above in my test lab and pull cables

Hi i''m trying to write my first dtrace script apparently i bit off a bit more than i can chew, i want to track io over sockets, i found your socketsize.d that gave me how to track writes, but i''m at a loss how to track reads, frankly i don''t see how your write tracker works because it uses a probe in a function that only takes two arguments but you grab size of write

how does one free segment(offset=77984887808 size=66560) on a pool that won''t import? looks like I found http://bugs.opensolaris.org/view_bug.do?bug_id=6580715 http://mail.opensolaris.org/pipermail/zfs-discuss/2007-September/042541.html when I luupgrade a ufs partition with a dvd-b62 that was bfu to b68 with a dvd of b74 it booted fine and I was doing the same thing that I had done on

this is off list on purpose ? > run zpool import, it will search all attached storage and give you a list > of availible pools. then run zpool import poolname or add a -f if you > didn''t export before the install/upgrade. assume worst case someone walks up to you and drops an array on you. They say "its ZFS an'' I need that der stuff ''k? " all

Hi All, I''ve just built an 8 disk zfs storage box, and I''m in the testing phase before I put it into production. I''ve run into some unusual results, and I was hoping the community could offer some suggestions. I''ve bascially made the switch to Solaris on the promises of ZFS alone (yes I''m that excited about it!), so naturally I''m looking

Hello, I have a problem with files locks on share. My server is running FreeBSD 10.2 (amd64) with ZFS pool (raidz) for windows share and samba 4.3.3 (ROLE_ACTIVE_DIRECTORY_DC). The server has approximately 100 users accounts and computers accounts. >From one windows workstation I open a file e. g. text file (file.txt) the smbstatus shows DENY_WRITE and everything seems right. But when I open

Hi, I have setup an old Compaq Proliant DL580 with 2 xeon @700MHz 2Gb RAM two SmartArray 5300 controllers and 12 drives in an array enclosure. I am running the latest opensolaris update bfu''ed from binaries since I could not build from source. I am controlling the drives with the cpqary3 driver (Solaris 10) from HP. Initially the array had 7 drives and I created a raidz zfs pool

I''m seeing some pretty pitiful performance using ZFS on a NFS server, with a ZFS volume exported (only with rw=host.foo.com,root=host.foo.com opts) and mounted on a Linux host running kernel 2.4.31. This linux kernel I''m working with is limited in that I can only do NFSv2 mounts... irregardless of that aspect, I''m sure something''s amiss. I mounted the zfs-based

Hi, Bug ID: 6775100 stat() performance on files on zfs should be improved was fixed in snv_119. I wanted to do a quick comparison between snv_117 and snv_122 on my workstation to see what kind of improvement there is. I wrote a small C program which does a stat() N times in a loop. This is of course a micro-benchmark. Additionally it doesn''t cover a case if doing stat() on not cached