similar to: Best practices for zpools on zfs

Gents, We want to understand the mechanism of zfs a bit better. Q: what is the design/algorithm of zfs in terms of reclaiming unused blocks? Q: what criteria is there for zfs to start reclaiming blocks Issue at hand is an LDOM or zone running in a virtual (thin-provisioned) disk on a NFS server and a zpool inside that vdisk. This vdisk tends to grow in size even if the user writes and deletes

Deduplication was committed last night by Mr. Bonwick: > Log message: > PSARC 2009/571 ZFS Deduplication Properties > 6677093 zfs should have dedup capability http://mail.opensolaris.org/pipermail/onnv-notify/2009-November/010683.html Via c0t0d0s0.org.

On Thu, Feb 14, 2008 at 11:17 PM, Dave <dave-opensolaris at dubkat.com> wrote: > I don''t want Solaris to import any pools at bootup, even when there were > pools imported at shutdown/at crash time. The process to prevent > importing pools should be automatic and not require any human > intervention. I want to *always* import the pools manually. > > Hrm... what

Hi Everyone ; I will soon be making a presentation comparing ZFS against Veritas Storage Foundation , do we have any document comparing features ? regards <http://www.sun.com/> http://www.sun.com/emrkt/sigs/6g_top.gif Mertol Ozyoney Storage Practice - Sales Manager Sun Microsystems, TR Istanbul TR Phone +902123352200 Mobile +905339310752 Fax +902123352222 Email

Hi gurus, I like zpool iostat and I like system monitoring, so I setup a script within sma to let me get the zpool iostat figures through snmp. The problem is that as zpool iostat is only run once for each snmp query, it always reports a static set of figures, like so: root at exodus:snmp # zpool iostat -v capacity operations bandwidth pool used avail read

On Wed, Aug 12, 2009 at 11:53 AM, Damjan Perenic<damjan.perenic at guest.arnes.si> wrote: > On Tue, Aug 11, 2009 at 11:04 PM, Richard > Elling<richard.elling at gmail.com> wrote: >> On Aug 11, 2009, at 7:39 AM, Ed Spencer wrote: >> >>> I suspect that if we ''rsync'' one of these filesystems to a second >>> server/pool ?that we would

I believe that I have incorporated all of the feedback given (thanks!). Changes since the 2008-11-16 version include: - ksh style & coding standards compliance in test script (Roland) - "dof_init_debug == B_FALSE" vs. "!dof_init_debug" (Adam) The updated webrev is at: http://cr.opensolaris.org/~mgerdts/6750659-2008-12-03/ -- Mike Gerdts http://mgerdts.blogspot.com/

Hello, I''m a grad student working at University of Michigan in computer architecture. I''m writing to open up the idea that instrumentation of the xvm would be extremely useful tool for the research community. Those of us interested in virtualization are very interested in monitoring the behavior of these systems and with low engineering effort! I was hoping to get feedback on

Hello, I have a situation where a host, which is booted off its ''rpool'', need to temporarily import the ''rpool'' of another host, edit some files in it, and export the pool back retaining its original name ''rpool''. Can this be done ? Here is what I am trying to do: # zpool import -R /a rpool temp-rpool # zfs set mountpoint=/mnt

I''ve tried using S10 U6 to reinstall the boot file (instead of U5) over jumpstart as its a ldom, noticed a another error. Boot device: /virtual-devices at 100/channel-devices at 200/network at 0 File and args: -s Requesting Internet Address for 0:14:4f:f9:84:f3 boot: cannot open kernel/sparcv9/unix Enter filename [kernel/sparcv9/unix]: Has anyone seen this error on U6 jumpstart or is

I just received a special offer from Sun (marketing...) promising that I will learn "How to use ZFS snapshots for backup and restore purposes." The relevant doc is at... https://www.sun.com/offers/docs/zfs_snapshots.pdf It says: === Begin quote === Archiving and Restoring Snapshots Another use of snapshots is to create archives for long-term storage elsewhere. In the following

Hi, since hostid is stored in the label, "zpool import" failed if the hostid dind''t match. Under certain circonstances (ldom failover) it means you have to manually force the zpool import while booting. With more than 80 LDOMs on a single host it will be great if we could configure the machine back to the old behavior where it didn''t failed, maybe with a /etc/sytem

[Cross-posting to ldoms-discuss] We are occasionally seeing massive time-to-completions for I/O requests on ZFS file systems on a Sun T5220 attached to a Sun StorageTek 2540 and a Sun J4200, and using a SSD drive as a ZIL device. Primary access to this system is via NFS, and with NFS COMMITs blocking until the request has been sent to disk, performance has been deplorable. The NFS server is a

People might find this entertaining and/or useful: http://www.gnu.org/manual/autoconf-2.52/html_chapter/autoconf_10.html With the help of Jos Backus I just discovered the answer to http://lists.samba.org/pipermail/rsync-cvs/2002-January/001271.html is that Sun's test(1) is breathtakingly broken when passed a dangling symlink: $ ln -s /nowhere bad $ ls -l bad lrwxrwxrwx 1 josb

I am pretty new to Dtrace but use the Dtrace Toolkit when trying to troubleshoot I/O issues On Oracle. I am looking for help on how to do the following: I am trying to answer whether adding more HBA Cards/ports would be effective. To do this, I need to know the i/o''s per second As well as total bandwidth per second. Has anyone done this before? Does anyone have any other ideas on how

Adam, With the blog entry[1] you''ve made about gzip for ZFS, it raises a couple of questions... 1) It would appear that a ZFS filesystem can support files of varying compression algorithm. If a file is compressed using method A but method B is now active, if I truncate the file and rewrite it, is A or B used? 2) The question of whether or not to use bzip2 was raised in the

Short question: I''m curious as to how ZFS manages space (free and used) and how its usage interacts with thin provisioning provided by HDS arrays. Is there any effort to minimize the number of provisioned disk blocks that get writes so as to not negate any space benefits that thin provisioning may give? Background & more detailed questions: In Jeff Bonwick''s blog[1], he

Hi! My name is Markus and I living in germany. I''m new to this list and I have a simple question related to zfs. My favorite operating system is FreeBSD and I''m very happy to use zfs on them. It''s possible to enhance the properties in the current source tree with an entry like "protected"? I find it seems not to be difficult but I''m not an

Does anybody know if native block level replication or block level ?de-duplication? as NetApp calls it will be added? This message posted from opensolaris.org

Is there any update/work-around/patch/etc as of the S10u4 WOS for the bugs that existed with respect to LU, Zones, and ZFS? More specifically, the following: 6359924 live upgrade needs to include support for zfs I can''t even find that bug ID on bugs.opensolaris.org (or via sunsolve when I''m logged in for that matter) anymore. Basically, one couldn''t put zoneroot on